Gregory Kielma • October 21, 2023
223 Remington/5.56 x 45mm NATO Cartridge
223 Remington/5.56 x 45mm NATO Cartridge
Hey Gregory,
Today's workbench is written by guest contributor and AGI Certified Gunsmith and GCA Moderator Robert Dunn:
There isn’t a day of my life that goes by that I don’t work with, reload, think or write about the .223 Remington and 5.56 NATO cartridges. Those cartridges are what a couple of my favorite and most used rifles are chambered for.
When I worked in an ammunition factory, I would sometimes get paid in .223 ammunition. When I was growing up in the early 1970s I became familiar with the .223 Remington cartridge, as it was the new round being used by our Armed Forces.
Warfighters throughout the world had realized the advantage of automatic firepower, but finding the perfect firearm and cartridge design is a huge challenge. In the case of the .223 Remington, many sources helped bring this cartridge into use by both civilians and the military.
Eugene Stoner of ArmaLite (then a division of Fairchild Industries) had gained the attention of the Military with his 7.62 x 51mm chambered AR-10 rifle. Like many high powered rifles, the AR-10 was hard to control during automatic fire.
Consequently, Fairchild Industries and Stoner were asked to scale down the AR-10 to fire a smaller caliber cartridge. Stoner came up with a prototype AR-15 and after a demonstration for the army, he was asked to produce more rifles for testing in 1957.
Select engineers and other companies like Remington Arms, Winchester as well as ArmaLite were asked to take part in developing this project. Springfield Armory’s Earle Harvey lengthened the .222 Remington case to the required specifications and it became the .224 Springfield, which was commercially known as the .222 Remington Magnum.
Frank Snow (of Sierra Bullets) and Eugene Stoner calculated the ballistics data for the .222 Remington to find the best bullet for the project, which ended up being a 55 grain bullet. Meanwhile, the Technical Editor for Gun and Ammo magazine, Robert Hutton, worked up a propellant recipe that could attain a velocity of 3,300 fps. Ultimately, Remington came up with the .222 Special cartridge, which was later renamed the .223 Remington because there were so many .222 designations.
Just a few of the military requirements for the firearm and cartridges were that they needed to be able to penetrate one side of a US Steel helmet at 500 yards, had to be able to exceed supersonic speed at 500 yards, had to be .22 caliber and select fire. From years of research and development of the AR-10 and AR-15, ArmaLite was facing financial difficulties and sold the rights for the rifles to Colt in 1959.
The AR-15 and the T44E4 rifle that would later be known as the M14 were being testing at the same time. To make a long story short, it was found that the AR-15 had far less failures per 1,000 rounds fired and that riflemen had a higher hit probability when firing Stoner’s rifle.
After Air Force General Curtis Le May test fired the AR-15, he ordered a batch of AR-15s to replace some of the M2 carbines that the Air Force was using. As the trials and testing continued, it was found that during marksmanship testing that many more men were achieving Expert shooting status with the AR-15 than they were with the M14. With these findings and the failure rate of the AR-15 going down even further, General Le May placed an order for 80,000 rifles in 1961.
In 1962, Remington filed the specs for the .223 Remington cartridge with SAAMI (Sporting Arms and Ammunition Manufacturer’s Institute) and the cartridge was later marketed commercially as a chambering for the Remington 760 rifle in 1963.
At this point in time, the United States was embroiled in the conflicts arising in Southeast Asia. It was politically decided that contracts for rifle manufacturing could be bid on by the private sector and Colt was awarded the contract to provide AR-15 rifles to fill orders for the Vietnam War.
The AR-15 rifle and the .223 Remington cartridge were formally adopted in 1964 and designated the XM16E1 rifle, commonly referred to as the M16, and the 5.56 Ball M193 cartridge. It was decided that the South Vietnamese troops would be supplied with the M16 rifle. Eventually, the Air Force, the US Army, Special Forces, the Coast Guard, the US Navy, the Marines as well as the SEAL teams had orders in for M16 rifles and cartridges. In 1965, Colt received orders for 800,000 M16E1 rifle and over 28,000 M16 rifles.
The M16 and the 5.56 Ball ammo would go through some major growing pains as the rifles and cartridges were issued to troops in Vietnam. Besides not being trained on how to properly clean the gun, the rifle suffered from many types of jams and failures.
Broken extractors and extractor springs accounted for many ejection failures and through more research, it was found that the propellant being used in the cartridges was creating horrific fouling of the gas and bolt system. The ball powder that was being used also created a longer pressure spike, which caused the case to expand in the chamber but it would not contract enough to be extracted.
The extractor would simply tear through the case rim, leaving the stuck case in the chamber. By using a different propellant, chrome plating the barrels and replacing the buffer with a new design that slowed down the cyclic rate, along with some other design changes, the problems were gradually sorted out. Unfortunately many American lives were lost because of these errors.
The process of selecting a smaller cartridge for use by NATO forces began in 1960. The cartridge design was based on the .223 Remington cartridge and its development was placed in the hands of FN Herstal. The rimless bottlenecked cartridge was named the 5.56 x 54mm NATO cartridge.
In 1980, the 5.56 NATO cartridge became the standard NATO rifle cartridge (known as the SS109 for NATO and the M855 for the United States). The 5.56mm cartridges allowed the soldier to be able to carry more ammunition, which equated to more firepower and logistically many more rounds could be transported to hot spots around the world by weight than the larger 7.62 NATO cartridges. On a global scale this can equal a savings of millions of dollars.
The number of firearms that are chambered for the 5.56 NATO cartridge is too numerous to list here. Just think about all of the different squad automatic weapons, rifles, carbines and machine guns that each NATO country uses…that is a lot of different weapons!
The Frankford Arsenal, Remington and Winchester produced the first lots of .223 ammunition for the United States Armed Forces. During the trials and testing of the AR-15, 19 Million .223 cartridges were purchased. When a cartridge does well for the military, the Law Enforcement and civilian communities usually follows their lead. If you have ever read the 27 page document for the military specifications for the M855 cartridge (5.56 x 54mm), you can see that heavy scrutiny has already been applied to the 5.56mm round!
The .223 Remington cartridge has become one of the most used cartridges in the United States. It is a great varmint and predator cartridge and could be used for larger game if need be by loading a heavier bullet like a Hornady GMX or Barnes TSX 70-grain projectiles. These slower moving heavier bullets seem to do quite well in windy conditions. The above attributes make the 5.56mm round a flexible survival cartridge too.
You may have noticed or even been annoyed by the interchanging .223/5.56 terminology, here are of the important similarities and difference between the two cartridges. The case dimensions are exactly the same, though case thickness/propellant capacity can vary significantly between manufacturers which will have an effect on the resulting pressures.
The 5.56 x 45mm NATO or other military 5.56 ammo tends to be loaded hotter, so chamber pressures will be greater than the typical .223 Remington load. For this reason, .223 Remington rounds can be safely fired in a 5.56 chambered gun but 5.56mm ammo should not be fired in a .223 Rem chambered gun.
The reason for this really comes down to the differences in the chamber dimensions between .223 and 5.56 barrels. The throat/free bore and leade of a 5.56mm chamber is longer. The throat of the chamber is the unrifled section of the chamber just forward of the neck and gives the bullet a place to sit. Leade or lead is the section of the bore of a rifled barrel located just ahead of the throat of the chamber. It is a conical shaped transition from end of the throat to the fully rifled part of the barrel.
In an effort to gain more accuracy from the 5.56mm NATO cartridge, Bill Wylde created the .223 Wylde, which is a chamber design that utilizes the same external dimensions and lead angle of a 5.56 NATO cartridge and the freebore diameter of the .223 Remington cartridge. Another company that uses a proprietary chamber design to achieve better accuracy from the 5.56mm NATO cartridge is Noveske. A Noveske barrel is not cheap but they are known for their precision and high quality products.
SAAMI specs are followed by manufacturers in the U.S. loading .223 Remington ammo but those same manufacturers who also load 5.56 ammo do not follow SAAMI specs because the 5.56 rounds are loaded to military specifications and thus not held to SAAMI specs. In Europe, the international organization C.I.P. tests and sets the safety standards for firearms and ammunition. In countries that are regulated by the C.I.P., .223 Remington ammunition is proof tested at the same maximum service pressure as the 5.56 x 54mm NATO cartridges.
There have been a lot of challenges that had to be met throughout the history of the AR-15 and the 5.56 x 54mm cartridge. The twist rate of a barrel and the chamber dimensions greatly effect performance and accuracy. The shorter barreled M4 carbines and the requests for even shorter barrel lengths coming from the Special Forces communities have kept firearms and ammunition engineers busy. At this point in time, the AR-15 style rifles and the .223 Rem and 5.56 NATO cartridges offer a very reliable and accurate shooting platform.
The AR-15 rifle and .223/5.56 cartridge combination have gone through many changes together. They are still being used by our Military/Law Enforcement and civilian populations to good affect every day. This combo is a must for 3-gun competition. The .223 Remington cartridge is not overly expensive and there is always a wide variety of ammunition to choose from. There is a lot of surplus ammo to select from as well. Many other firearms are chambered in .223 Rem besides the AR-15 type guns.
The 5.56mm round is a good cartridge to reload for, as there is a huge variety of quality components to choose from as well. In 1964, the year I was born, these cartridges were the new warfighting cartridge and the US Armed Forces began using them. It’s easy for me to remember how many years these cartridges have been in use!
Become an American Gunsmith and continue to preserve our Firearm’s Heritage!
Robert Dunn,
Gunsmith & Community Moderator
American Gunsmithing Institute
Gunsmithing Club of America
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Why Monitoring Your Blood Pressure Matters By Gregg Kielma Tactical K Training and Firearms 01/20/2026 As an ERT Captain and certified instructor, I provide blood pressure checks, if wanted, during all my classes I offer. This has helped us detect clients with potentially serious heart issues they were unaware of. While not a physician, I can identify critical warning signs requiring further attention. High blood pressure is often called the “silent threat” for a reason—it rarely shows symptoms, yet it can quietly damage your heart, blood vessels, kidneys, and brain over time. Regular monitoring is one of the simplest and most effective steps people can take to protect their long-term health. Checking your blood pressure at home gives you real time insight into how your body responds to daily stress, diet, sleep, and activity. It helps you catch changes early, long before they turn into serious medical problems. For many people, home monitoring also provides more accurate readings than occasional doctor visits, since it removes the stress and pressure of the clinical environment. Consistent tracking empowers you to make informed decisions about your lifestyle and health. It allows you to share accurate data with your healthcare provider, helping them tailor treatment, adjust medications, or recommend preventive steps. In short, monitoring your blood pressure isn’t just a habit—it’s a form of self-protection and early detection that can truly save lives. Thank you for taking the time to read this and help save your life or others. If you have any questions, please let know. Gregg Kielma
Why Some Virginia Lawmakers Push for Strict Gun Laws and Bans By Gregg Kielma Tactical K Training and Firearms 01-19-2026 Debates over firearm legislation in Virginia have intensified in recent years, with several lawmakers proposing sweeping restrictions on gun ownership, magazine capacity, and permitting requirements. While these proposals are controversial and often opposed by responsible gun owners, it’s important to understand the motivations driving them. Knowing the “why” behind these efforts helps gun owners stay informed, engaged, and prepared to advocate for their rights. 1. Rising Concerns About Public Safety and Gun Violence Many Virginia legislators argue that stricter gun laws are necessary to address concerns about public safety. Bills such as SB1109, introduced in 2025, aim to tighten handgun purchase regulations and expand background checks, reflecting a belief that limiting access will reduce misuse. Supporters claim these measures are intended to prevent firearms from falling into the hands of individuals who may pose a risk. 2. A Push for More Comprehensive Vetting Several proposals focus on expanding the vetting process for firearm permits. These include: • Mandatory fingerprinting • More extensive background checks • Reviews of criminal history and mental health records These measures are framed as efforts to ensure only “qualified” individuals can obtain permits. While many responsible gun owners already exceed these standards through training and safe practices, lawmakers argue that uniform statewide requirements are necessary. 3. Influence of Gun Control Advocacy Groups Organizations that support firearm restrictions have become increasingly active in Virginia. Groups promoting “evidence based” gun violence prevention policies advocate for licensing systems, storage mandates, and magazine bans as ways to reduce crime and accidental shootings. Their messaging often influences legislative priorities, especially in districts where voters favor tighter regulations. 4. Political Shifts in Key Regions Urban and suburban areas of Virginia — particularly Northern Virginia — have grown rapidly and tend to elect representatives who support stricter gun laws. These lawmakers often cite constituent pressure to pass bans on certain firearms or accessories, such as the proposed magazine ban highlighted in recent legislative discussions. 5. A Belief That Restrictions Will Reduce Crime Some legislators believe that limiting access to certain firearms or magazines will reduce violent crime. For example, proposals to raise penalties for violent offenders using firearms are framed as crime reduction strategies. While critics argue that these laws target lawful gun owners instead of criminals, supporters maintain that restrictions are part of a broader public safety strategy. Kielma’s Parting Shot Virginia’s push for strict gun laws is driven by a combination of political pressure, advocacy influence, public safety concerns, and shifting demographics. Whether or not these laws are effective is a separate debate — but understanding the motivations behind them helps responsible gun owners stay informed and engaged. Gregg Kielma
Outside The Waste Band Holster. Open Carry Understanding Brandishing or Improperly Exposing a Firearm By Gregg Kielma_ Tactical K Training and Firearms 01/19/2026 I always field questions during training classes about brandishing a firearm in public, what are the consequences and how will it impact my life, my career or my family’s life? Let’s take a LOOK: My Thoughts Brandishing — or improperly exposing a firearm — is one of the most misunderstood areas of firearms law. Many gun owners assume that if they don’t point a gun at someone, they’re safe from legal trouble. The law takes a much broader view. Knowing what qualifies as brandishing is essential for every responsible gun owner. What “Brandishing” Actually Means Across most jurisdictions, brandishing refers to displaying a firearm in a threatening, intimidating, or aggressive manner. Importantly, the firearm does not need to be pointed at anyone for the act to be considered brandishing. According to legal sources: Even unintentional exposure can lead to accusations if someone feels threatened. • Brandishing is the act of displaying a firearm “to intimidate, threaten, or cause fear in another person”. • It includes “displaying, waving, or showing a weapon in a manner that is threatening or intended to intimidate”. • The key elements often include: o Another person is present o The display is aggressive or alarming o The intent (or perceived intent) is to cause fear What Brandishing Is Not: Context matters — and perception matters even more. If a reasonable person would feel threatened, the situation can escalate quickly. • Simply carrying a firearm in a lawful manner • Printing or accidental brief exposure while concealed carrying • Displaying a firearm in a non-threatening context (e.g., holstering at a range, cleaning at home) Potential Legal Consequences Brandishing is treated as a serious offense because of its potential to escalate into violence, even when no shot is fired. Depending on the state and circumstances, consequences may include: Criminal Charges • Misdemeanor or felony charges • Arrest and potential jail time • Heavy fines Loss of Firearm Rights • Suspension or revocation of concealed carry permits • Possible long-term loss of firearm ownership rights Civil Liability • Lawsuits from individuals who felt threatened • Financial damages for emotional distress or other claims Long-Term Impact • Criminal record • Loss of employment opportunities • Damage to reputation and credibility Why This Matters for Responsible Gun Owners I teach in my classes responsible firearm ownership and marksmanship, it matters. It’s about judgment, restraint, and understanding the law. Brandishing charges often arise from emotional reactions, poor decision-making, or misunderstandings that could have been avoided with proper training. A responsible gun owner should always: • Keep the firearm concealed unless legally justified to draw • Avoid escalating confrontations • Understand state-specific laws • Prioritize de-escalation, avoid, escape and as a last resort defend. Be the reasonable person. Always have a plan. Kielma’ Parting Shot Brandishing or improperly exposing a firearm is a serious legal matter with consequences that can follow a person for life. Education, awareness, and disciplined behavior are the best tools to prevent these situations. When gun owners understand the law and act responsibly, they protect not only themselves but the entire firearms community. Gregg Kielma
Wanda Kielma, Office Boss: A Life Defined by Strength, Service, and Steadfast Values Wanda Kielma i s a woman whose life reflects resilience, dedication, and a deep commitment to the people around her. Known for her unwavering work ethic and her ability to bring calm, order, and compassion into any environment, Wanda has earned the respect of colleagues, friends, and family alike. Raised with strong values and a clear sense of responsibility, Wanda built her reputation through decades of consistent service and leadership. Whether managing complex tasks, supporting others through challenges, or stepping into roles that demanded reliability and integrity, she has always been the person people could count on. Wanda’s professional life is marked by diligence and loyalty. She approaches every responsibility with a level of care that sets her apart—never cutting corners, never compromising her standards, and always putting people first. Her ability to balance firmness with kindness has made her a trusted presence in every setting she enters. Beyond her work, Wanda is the heart of her family . She is the steady voice of reason, the quiet force that keeps things moving forward, and the person who shows up—every time, without fail. Her strength is not loud or boastful; it’s the kind that’s built through years of perseverance, sacrifice, and love. Those who know Wanda describe her as grounded, dependable, and deeply principled. She leads not through titles or recognition, but through example. Her life is a reminder that true character is revealed in the everyday choices we make and the way we treat the people around us. In a world that often celebrates the flashy and the temporary, Wanda Kielma stands out for all the right reasons: her integrity, her humility, and her unwavering commitment to doing what’s right. Her legacy is one of quiet strength—and the countless lives she has touched along the way. Our God is Great Wanda Amen….Love you for everything you have done for the past 40 plus years....
Gregg Kielma Tactical K Training and Firearms Who I Am and Why I Teach: A Personal Message from me, Gregg Kielma Owner of Tactical K Training and Firearms to You, My Family, Friends, Clients and Students Running Tactical K Training isn’t just a business for me — it’s a responsibility I take seriously. Every day, I meet people who want to become safer, more capable, and more confident in their own lives. My job is to give them the tools, the knowledge, and the mindset to do exactly that. I’ve spent years working with firearms, optics, equipment, and real-world defensive concepts. Over time, I’ve learned that skill alone isn’t enough. What matters most is judgment — knowing when to avoid, when to de-escalate, when to escape, and only as a last resort, how to defend yourself or your family. That philosophy guides everything I teach. My approach is simple: clear instruction, real world context, and respect for the responsibility that comes with firearm ownership. I don’t teach fantasy scenarios or “tactical cosplay.” I teach practical, lawful, life preserving skills that ordinary people can use under stress. Whether I’m helping someone mount their first optic, refine their dry fire routine, or understand Florida’s self-defense laws, my goal is always the same — empower them to make smart, safe decisions. I believe in building a community of responsible gun owners who value safety, education, and continuous improvement. That’s why I write articles, update my website, and stay engaged with students long after their class ends. Training isn’t a onetime event. It’s a mindset. If you train with me, you’ll get honesty, professionalism, and instruction tailored to your experience level. You’ll also get someone who genuinely cares about your growth and your safety. I’m proud of the work we do here, and I’m grateful for every student who trusts me to guide them. Stay safe, stay prepared, and keep learning. — Gregg Kielma Tactical K Training & Firearms
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Houston straw purchasing ring charged with smuggling firearms to North Korea Friday, January 9, 2026 U.S. Attorney's Office, Southern District of Texas Alleged ringleader was illegal alien from China with expired U.S. visa HOUSTON – Seven people have been charged for their alleged roles in a firearms trafficking scheme, announced U.S. Attorney Nicholas J. Ganjei. The indictment alleges Chinese national Shenghua Wen, 39, whose U.S. visa expired in 2013, served as the ringleader. He has now made his appearance in Houston federal court. Also charged are Chinese nationals Sifu Zhao, 24, Yiyang Wu, 40, and Mingtong Tan, 27, who all resided in Houston; Jin Yang, 60, Ontario, California; Max Mingze Li, 36, Houston; and Richard Arredondo, 51, a U.S. citizen who resided in Mexicali, Mexico. According to the indictment returned Oct. 8, 2025, Wen and his girlfriend, Yang, purchased a gun store and directed the purchase of specific firearms and their sale to straw purchasers, such as Zhao, Tan, Wu, Mingze Li, and Arredondo. Wu also allegedly recruited one straw purchaser into the ring and transported pistols to a second Houston gun dealer for sale to others. Between 2023 and 2024, the group obtained approximately 170 firearms and several thousand rounds of ammunition that were destined for North Korea, according to the indictment. The charges allege Wen recruited Zhao and Tan to act as straw purchasers. They, along with Mingze Li and Arredondo, allegedly bought firearms on Wen’s behalf. Some of the firearms were later transported to another Houston firearms dealer for resale to members of the ring, according to the charges. Wen and Yang are charged with conspiracy and conspiracy to commit firearms trafficking which carry respective terms of five and 15 years in prison, upon conviction. Wen could also receive an additional five years if convicted on any of the seven counts of aiding and abetting false statements to a federal firearms licensee. Mingze Li, Arrendondo, Wu, Zhao and Tan each face one count of conspiracy and varying counts of aiding and abetting false statements to a federal firearms licensee with possible five-year maximum terms of imprisonment on all counts, upon conviction. All charges also carry as possible punishment a maximum $250,000 fine. The Bureau of Alcohol, Tobacco, Firearms and Explosives conducted the investigation with assistance from Immigration and Customs Enforcement – Homeland Security Investigations and Houston Police Department. Assistant U.S. Attorney John Ganz is prosecuting the case. An indictment is a formal accusation of criminal conduct, not evidence. A defendant is presumed innocent unless convicted through due process of law. Updated January 9, 2026
Ohio Man Arrested and Charged for Firearms Dealing, Unlawful Possession of Firearms and Ammunition Wednesday, January 14, 2026 U.S. Attorney's Office, District of Massachusetts BOSTON – An Ohio man has been arrested and charged in connection with multiple sales of firearms transported from Ohio to Massachusetts. Ruben Joel Sanchez Jr., 31, was charged with one count of engaging in the business of dealing in firearms without a license and one count of being a felon in possession of firearms and ammunition . Sanchez made an initial appearance in federal court in Boston on Jan. 9, 2026. According to the charging documents, beginning at least as early as June 2025 through January 2026, Sanchez engaged in the business of unlawful trafficking in firearms. In June 2025, Sanchez, who is not licensed to deal in firearms, sold three firearms to an individual in exchange for $4,000. On Jan. 8, 2026, Sanchez was recorded and observed selling four additional firearms to the same individual in return for $8,500. When Sanchez was arrested at the scene, an AR-style pistol equipped with a loaded, 100-round drum; a rifle equipped with a loaded, 100-round drum; a loaded pistol equipped with an extended magazine; and an additional loaded pistol were recovered. The charge of felon in possession of firearms and ammunition provides for a sentence of up to 15 years in prison, three of supervised release and a fine of up to $ 250,000. The charge of unlawful trafficking in firearms provides for a sentence of up to five years in prison, three years of supervised release and a fine of up to $ 250,000. Sentences are imposed by a federal district court judge based upon the U.S. Sentencing Guidelines and statutes which govern the determination of a sentence in a criminal case. United States Attorney Leah B. Foley and Thomas Greco, Special Agent in Charge of the Bureau of Alcohol, Tobacco, Firearms, and Explosives made the announcement today. Assistant U.S. Attorney Julissa Walsh of the Major Crimes Unit is prosecuting the case. The details contained in the charging documents are allegations. The defendant is presumed innocent unless and until proven guilty beyond a reasonable doubt in a court of law. Updated January 14, 2026
9mm Hollow Point Ammo Hollow Point vs. Regular Range Ammo and How a Hollow Point Actually Works By Gregg Kielma 01/18/2026 New students often ask me about my everyday carry. I use a Glock 19 loaded with 9mm, 124-grain hollow points that I reload myself using new brass. I always keep one in the chamber for quick access. If needed when I take it out of its holster it’s ready to fire I do not have to rack the slide. This, in my opinion, saves me precious time. This is my plan, yours maybe different. Let’s Take a LOOK at range ammo and hollow points. These are my Thoughts. 1. What is a “regular range ammo round”? FMJ is inexpensive, reliable, and ideal for training. It’s not designed for controlled terminal performance. Most shooters mean FMJ (Full Metal Jacket) when they say, “range round.” FMJ bullets have: • A lead core fully enclosed in a copper jacket • A solid, rounded or pointed nose • Minimal or no expansion on impact • Straight-line penetration through soft targets 2. What is a Hollow point? This expansion round increases stopping effectiveness and reduces the risk of over penetration. A hollow point (HP) — often a Jacketed Hollow Point (JHP) — has: • A cavity or hollow opening in the nose of the bullet • A jacket engineered to peel back or mushroom • A design purposefully built for expansion on impact 3. How a hollow point works (simple explanation): This controlled expansion is why hollow points are the standard for self-defense and law enforcement When a hollow point strikes soft tissue: 1. Fluid enters the cavity in the nose. 2. Pressure forces the bullet’s jacket and lead core to expand outward. 3. The bullet mushrooms, creating: o A larger wound channel o More energy transfer o Reduced penetration depth compared to FMJ 4. Key differences Range Ammo Hollow Point (JHP) Nose Design Solid Hollow Cavity On impact Minimal expansion Expands/mushrooms Penetration Often over penetrates Controlled, reduced Best use Training, target shooting Self defense Cost Low Higher 5. Why some ranges restrict hollow points Some ranges — especially indoor facilities — limit hollow points due to: • Backstop wear concerns • Ricochet management • Local policy or insurance requirements
