Without a lot of validation of the article, the conclusion seen very valid. All my grandkids can or will learn (two under a year old) to shot a .22 rifle and pistol!
Practice for defensive shooting...double tap to the chest and one to the head or two to the head and one to the chest. Osama bin Laden fight or lack of fight is confirmation!
A point of interest. My son inl-aw's father was a coroner for 25 + years in in a large western Colorado county. As he tells it, he has recovered more bodies with .22 caliber fatal shots then any other caliber. And he says, that little wad of lead does some funky damage when it hits a body, e.g. shot though the eye, then just bounces around the inside of the skull scrambling the brain until it runs out of energy or hit a femur then follows the bone and end near the opposite shoulder. All the while Larger calibers leave big straight holes that can be bandaged.
I agree with Budman5 about a .22. I carry .380 ACP, .38/.357/9mm, .44 Mag. and my favorite, the 1911 - 45ACP.
I like the idea of a large gapping hole. unless I'm punching holes in paper or shooting steel. ALL my carry/defense rounds have hollow points or controlled expansion bullets.
To paraphrase Lt Col Jeff Cooper, use a handgun to fight to get to your long gun. That just maybe your 15-22.
Interesting about the rifle and shotgun stats. I would be interested in break down of the rifle cablers too.
The shotgun stats confirmed, what the German's whined about in WWI, when the US solders and marines hit the trenches with their shotguns! Es tut mir leid. Nein! OBTW... the Germans were the first to use chemical weapons in WWI too. ( both my grandfathers were in France during WWI.
So my conclusion is, have plenty of .22 ammunition and load up on #2, BB, and #4 buckshot, OO, and slugs Shot shells, and even some .40 S&W ammo.... for your friends who don't reload!
Aim small,
tat