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Handgun Stopping Power: Sizing Up Your Options

Handgun Stopping Power: Sizing Up Your Options

The author fired 100 handgun loads into ballistic gelatin, measuring velocity, penetration and expansion for each.

By Richard Mann, Field Editor

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8/29/2012

The term handgun “stopping power” generally relates various opinions about the ability of handguns to create ballistic wounds sufficient to incapacitate a target. Using muzzle velocity, caliber, bullet weight and energy, there have been multiple attempts to create formulas to rate handgun stopping power. The problem is that these theories are tied to mortality; the notions are based on the handgun’s ability to kill. From a hunting standpoint, that makes sense, but when looking at the role of a defensive handgun, it’s at least partially of no consequence.

The goal of the hunter is to kill as humanely as possible. The goal of an armed citizen using a defensive handgun is to stop an attacker as fast as possible. As similar as killing and stopping may sound, they are two very different things. It’s true that if you kill something you have stopped it, but unlike a hunter who can shoot an animal and let it run off a short distance to expire, a defensive handgun user needs to stop an attack immediately.

Causing immediate death with any firearm is difficult, achievable almost only by a shot to the cranial vault that destroys the brain and nervous system. That is difficult to accomplish in a dynamic situation. It is why law enforcement officers, soldiers and civilians train to shoot center mass of the available target; it increases hit probability. As a result, that is where the debate of handgun stopping power is centered.

What handgun/ammunition combination will do the best job of stopping an attack when a bullet is placed center mass of the attacker? The operative word here is stop, not kill. If an attack is not halted immediately, death might be the ultimate result, but it might arrive too late to matter.

Animals, and that includes humans, die when their brains run out of oxygen. As a law enforcement officer, the first murder I investigated was perpetrated with a .17-cal. pellet rifle, proving to me that about any bullet through any vital organ can kill. But it can take from 10 seconds to 10 minutes to occur. In 10 seconds an attacker can carve you up like a Christmas turkey. What’s needed is a combination that’s very likely to make an attacker stop doing the thing that is endangering you, immediately.

Jim Cirillo, a New York City cop who survived many gunfights, once wrote, “The only one-shot stops I ever saw were a .38 Special Super Vel hollow point and a 12 gauge slug. Both shots were to the brain.” Two other cops, Evan Marshall and Ed Sanow, authored three books examining one-shot stops from defensive handguns. Their work is shrouded in controversy for several reasons, but something that cannot be ignored is that they found multiple instances with every common defensive handgun cartridge where one-shot stops had occurred. Keep in mind their study was about one-shot stops, not one-shot kills. It is most important to recognize that Marshall and Sanow did not find a single cartridge that had not produced multiple one-shot stops.

How could that be? How could small caliber, pipsqueak guns stop attacks? The answer is simple; pain and fear. Police officers know that pain compliance is an important tool. They are issued batons and pepper spray to bring that about. But you don’t have to be a cop to know that. Few things control human behavior like pain. Smack your thumb with a hammer hard enough and you’ll immediately stop what you’re doing, and even the toughest cage fighter can be stopped with a solid hit to the groin, kidney or liver.

The key to immediately stopping an attacker with a handgun is either through the conscious fear that you’ll shoot him or through the conscious or unconscious fear and/or pain the shot inflicts. Fear and pain are why things such as pepper spray, batons and less-lethal rubber bullets are effective too. Regardless of how determined someone is to doing harm to someone else, if the aggressor is hurt badly enough he or she will stop. So, the logical approach to handgun stopping power would seem to be to use the combination capable of causing the most pain.

The problem with pain is that there is no way to measure the amount any combination might produce. It would seem that those loads that make very wide and nasty, but sometimes shallow wounds, such as Corbon’s 165-gr., .45 ACP +P load, would hurt the most; it will literally chew up the first 6" of a gelatin block. Loads like that damage a great deal more tissue than those that punch a neat hole all the way through a bad guy like a 230-gr., .45 ACP full-metal-jacket (FMJ) load, which can penetrate 3 ft. in gelatin. The data collected by Marshall and Sanow seem to support that conclusion. So do the results of the controversial Strasbourg Tests, in which multiple goats were shot while being electronically monitored.

That all makes sense, but by itself can be a foolhardy approach because pain is not experienced the same by everyone and pain can be blocked by adrenalin and drugs. Soldiers and police officers who have battled through pain become heroes, bad guys that do the same become wanted. It’s likely that the adrenaline in your attacker will be high and it’s possible he could be under the influence of a mind altering drug. Pain and fear are effective but might not be enough.

So what is the answer? Some like to base conclusions on caliber, bullet weight and energy. So let’s consider those. The caliber of the unfired bullet matters very little since bullets radically change shape in the first several inches of penetration. And, after dynamic expansion has occurred, the wound created varies minimally regardless of expanded bullet diameter. Jim Cirillo stated in his book, Bullets, and Gunfights, Lessons and Tales from a Modern-Day Gunfighter, “The forensic experts I have questioned while attending many post mortem examinations stated that they could not tell the difference between a .32 caliber round nose bullet and a .45 caliber round nose if both passed through the body, since both only make small wound channels as they pass through tissue.” My testing has confirmed this; in 10 percent ordnance gelatin their wound channels are indistinguishable.

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Comments

  • Rick

    12/12/2012 7:26:00 AM

    What about the truncated bullet? It was quite the rage a few years back.Anyone know how effective it has turned out to be?

  • nvrpc

    12/1/2012 6:58:23 PM

    I still like the 45 ACP with th Black Talon and Wilson Combat JHP staggered in the mag.

  • Bob

    11/15/2012 7:23:53 PM

    I don't agree that pain will stop an attacker. All the examples you give (solid hit to the groin, kidney or liver), represent specific trauma to areas of the body that cause specific physical reactions in the body that can incapacitate an attacker for a limited or protracted amount of time. Trauma and pain are different and pain won't stop an attacker. Damaging the body so it cannot function or delivering trauma to the body such that it reacts involuntarily, will. Professional athletes and weekend warriors alike compete with pain all the time. Motivation and adrenalin allow people to continue the fight, shrugging off pain. By contrast, trauma that causes injury or an involuntary physical reaction cannot be shrugged off. An attacker who is on drugs, or just super motivated won’t stop to say “ouch, that hurts”. And yes, when I hit my thumb with a hammer, it stops me for a few seconds- about long enough to say a few swear words but after that I resume working. If I can “push through the pain” a psychopathic killer hyped up on meth will not even notice you broke his nose (very painful) with a perfect strike or kick. That’s not going to stop him. When defending yourself, never focus on causing pain. Cause injury.

  • Ray

    9/23/2012 5:30:28 PM

    There are three ballistic categories; internal, external and terminal. Velocity is part of external ballistics as is foot pounds energy. Terminal ballistics is what the projectile does on impact with the target. It is not a smorgasboard as the article presents. Some lower velocity rounds meet or exceed the higher velocity rounds, hence velocity isn't part of terminal ballistics.

  • John

    9/19/2012 1:28:09 PM

    This write up is not correct. Simple fact is physics, larger the bullet, faster it's traveling = force of impact. Force of impact / by resistance = Stopping power. To create resistance you can use jhp instead of fmj. A 50 bmg has more stopping power then a .22. This thing about bullets rapidly changing size is/. Bullets don't change size, mass can't be destroyed or created remember? The more lead in a target means the faster they go down, end of story.

  • Pfletch83

    9/14/2012 1:14:46 AM

    What about the .410 revolvers and the 2-1/2 inch '000' buckshot loads? They offer a very good chance at structural damage,and two shots (if needed) from such 4-pellet loads equal what the threat would get from a single 12 gauge '000' load

  • Gary

    9/6/2012 3:30:54 PM

    As you have all noticed over the years, lots of articles on stopping power, lots of one-stop formulas, and lots of inconclusive results. The problem with handgun cartridges is that they're not rifle cartridges. They are woefully lacking in raw power and shocking power is nonexistent. So what's a guy to do? You have to create advantages in your favor. Bigger holes are better than smaller ones because they can cut a nerve bundle or artery that a smaller hole would miss. Heavier bullets are better than lighter ones because they will plow through bone instead of getting deflected and don't forget that all the major organs are protected by bone. Deep penetration is better than shallow because you can drive one deep through clothes, bones, and important organs. Velocity is needed because it creates expansion but expansion limits penetration. You can overcome that with more bullet weight (momentum). So the ideal weapon would be a long-barreled .44 Magnum. You have large diameter, high velocity, and heavy bullets, everything needed in an all-around problem solver. But its probably too big and powerful to be practical. On the other end of the scale we have the diminutive .380. So the trick is to pick a cartridge that is as close to the .44 as possible and as far away from the .380 as possible. Having done everything possible under your control, the result of your shot will depend on your luck in where the bullet hits. Assuming you are taking on an armed assailant, you only get a shot or two before he fills you full of holes. That's why you need to bring a stopper to a gunfight: no do-overs. These arguments of shooting the BG 125 times with a mouse gun in order to make up for lack of power just don't make sense. So do your homework. All the power you can carry on the street and all the power you can shoot at home. Don't give the BG any chances, give him shock and awe.

  • Steve

    9/5/2012 7:16:14 PM

    Remington has re-released the 125 gr JHP with the scalloped edges in a plus-p loading. It has one of the best reputations in the business of one-shot stops, and was a very lethal round also, according to the Southwest Forensic Medicine Center in Dallas, where manyh of the autopsies were performed. It is an excellent round with good accuracy and excellent expansion.

  • Gene Caple

    9/5/2012 7:59:40 PM

    Your argument of stop vs kill is well taken However, a shot that effectively stops a subject by immediately incapacitating him usually results in death. Haed shots are obvious but a shot to center mass or to the upper abdominal area will cause immediate incapacitation by disrupting blood flow to the bain, however, as I said above, this will also cause death.

  • Mark

    8/29/2012 3:01:20 PM

    Godbless The NRA !!!!