Escapement,
As an experiment with my officers,I demonstrated the power of a 22 magnum from a North American Arms mini revolver.

I took a plastic gallon milk jug and filled it with warm water and took it out by a sand berm. One shot into the jug from about a foot away sent water in all directions.

And yes,practice is the key element here. The vast majority of SD ranges are 10 ft or less with most at near contact.

Ed Lovette's book The Snubby Revolver is very good as well as No Second Place Winner by Bill Jordan. Bill Jordan,in that book goes into a good amount of detail of the lightweight snubby in 22 magnum. And this was before the North American Arms mini revolvers!!!

Wayne