Oh boy another Zombie thread! Originally buried in 2008 and shambling along again.
For me as at lest one of the older posters (both his age and the age of the post) the first rule of gun fighting is "1. AVOID GUN FIGHTS."
......but number two is, "2. HAVE A GUN."
A .22 Magnum revolver is a gun.
If the person bearing the .22 Magnum is comfortable and confident and competent with the .22 Magnum, don't harass them.
My sister's House, Car, and Carry gun is one of the old HS DA.22 Magnum revolvers. It has served her for about 30 years now. Her hubby carries a HS O/U DA .22 magnum derringer at all times, even when carrying something more formidable.
My point being they are both comfortable, confident, and competent with their choices. Might not be my first, second, or third choice for a handgun and cartridge combo in either case, but it is their choice and for the past three decades has worked.
Move along......
-kBob