I beg to differ. The 17 cal will penetrate a bullet proof vest and do alot of damage. Glaser saftey slugs dont penetrate either but the damage is excessive. .22 magnums are a jacketed bullet, not lead like a .22 LR. They will penetrate and do alot of damage at 2000 fps, for comparison a .38 spl is moving at about 850 fps and a .357 magnum at about 1250 fps. With alot more mass to push on after impact. When I carry a 9mm with corbon 115 gr JHP, if I need maxium concealment, Ill carry a Makarov 9X18. But, I would not feel underarmed with a .22 magnum revolver, Ive killed more with my .22 magnum single action revolver then any other gun I own.