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Several years ago, I chrono-ed Maxi-Mags out of my Ruger 4.6" Anniversary SS, soon to be gone, with the .22 WMR cylinder to get 1470 +/-39 fps. The .22 LR cylinder and Federal Game Shok gave 1023 +/-20 fps. Both were with 40gr bullets. I'll keep my Remington R38S12 +P 158gr LHPSWCs - they make ~860 fps from my 1.9" 642 - that's decent protection. Heck, I'll bet some 148gr full wadcutter target loads at ~670+ fps from that 642 is far better protection than the .22 WMR. Cerainly not as loud.
I helped a friend of my wife's one Sunday - after Church - with her NAA mini-revolver in .22 WMR. Not my idea of protection - but all she had. It beats nothing. Still, even a .32 ACP - like my wife's Seecamp - would be easier to shoot - especially if you had to hit something over a yard away. Her friend shot my 6" 629 - with some mild Magnums - my wife wouldn't even shoot that. You should have seen her smile...
'Anything' beats nothing. Some things just barely, however.
Stainz
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