Good article on the .22 Magnum for Self Defense
www.americanrifleman.org

An Official Journal Of The NRA | The .22 Magnum: Good for Self-Defense?
For some novice shooters, a gun chambered in .22 Winchester Magnum Rimfire (WMR), also known as .22 Magnum, might be the best place to start. It’s affordable, readily available and relatively easy to shoot.