<< Killing is a function of putting a hole in the pump room, and if you put a .22 hole in the pump room you'll kill somebody good. The ill effect is that if you miss the pump room, you're more likely to stop somebody with a .45 in the liver than with a .22 in the liver. >>
I think you misunderstand ballistics, and the effect rounds have in body tissue, particularly cavitation.
Try to think of it in terms of the size and shape of the hole (cavitation) caused by two very different rounds, the .22LR and the .357 Magnum. Essentially, the cavitation caused by the .22 is going to be long, thin, and narrow. Think of a hole the diameter of a pencil being drilled through your body.
The hole caused by the .357 Magnum, OTOH, is going to be broader and shorter than the .22... instead of a hole shaped like a pencil, think of a hole shaped like an ice cream cone, with the bottom tip of the cone being at the point of impact, and the ice cream part about 6-8" deep (or, in other words, in the middle of the chest cavity). Now, make it a really big ice cream cone, where the scoop of ice cream is about the size of a large orange, or small grapefruit, and that's the cavitation caused by the .357 round.
Which size hole would you rather have in your thorax, the long, thin, pencil shaped one, or the shorter, wider, ice cream cone shaped one?
<< Personally, I'll take a nice solid that'll go in a stright line through a body over anything else unless there are neighbors involved. >>
Bad advice when you're trying to incapacitate an attacker, for the reasons stated above.
<< I understand the ballistics of the m 16 are such that the bullet has erratic performance after hitting a target, so it'll cause more deleterious leg wounds and the like. >>
The M16/M4 fires an entirely different cartridge. The M16 fires a .223 Winchester (NATO standard) round, with about 1,400 foot/pounds of energy at the muzzle. Most .22LR are lucky to generate a little over 100 ft/lbs.
So you can have your "nice solids that go in a straight line" for your self-defense needs. I, on the other hand, prefer my .40 S&W Cor-Bon 135gr., which generates 526 ft/lbs. as my load. Your .22LR rounds at 116ft/lbs, or my .40s at 526, which would you prefer to be hit with if you were a bad guy?
<< Oh, one other note: I would personally do anything to avoid shooting to kill. Shoot into the floor, shoot right buy him or whatever, but there are serious conscience reprecussions to killing a human being. >>
Nothing personal, but with a mindset like that, you're probably better off not owning a firearm at all. You're simply more likely to be a danger to yourself with a firearm, than a deterrent.