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Old December 23, 2018, 03:56 PM   #4
pblanc
Senior Member
 
Join Date: March 23, 2008
Location: Indiana
Posts: 631
Here are a couple of other imponderables.

Why do so many fans of the 9 mm Luger cartridge for handguns deride the thought of a pistol caliber carbine chambered in 9x19 for home self-defense? As if 9 mm Luger somehow becomes ineffective when shot out of a long barrel with 150-200 fps greater muzzle velocity?

Why do so many people who like both 9 mm Luger and .45 ACP for handguns deride the .40 S&W cartridge because it is a "compromise"? As if a cartridge that makes intermediate size holes and has an intermediate magazine capacity somehow becomes inferior to both 9 mm and .45 ACP.

As for 5.56x45, when it comes to FMJ ammunition its wounding capacity is highly variable. If the projectile tumbles and/or fragments before it exits it can be highly lethal. If not, it might just drill holes no bigger than those that a 22 LR projectile would make. But nobody can argue that 5.56x45 FMJ has killed a hell of a lot of people.

For handguns, lethality pretty much depends on what you hit assuming penetration is adequate. Larger diameter projectiles and projectiles that expand increase slightly the chance that any given hit will damage a critical structure.

With high velocity rifle cartridges many believe that phenomena such as "hydrostatic shock" and "energy deposit" come into play, although from what I have seen I am somewhat skeptical.

IMO if you want a high likelihood of quick incapacitation with a single decent hit, skip the rifle and the handgun and go directly to a 12 gauge.
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