I'm kinda a tokarev nut.have 4 two t33s and two m57s and on ppsh43.handloading u can get 1700 fps out of it with a 85 gr bullet that's too rough for a cz 52 which should be stronger but isn't.had some Chinese corrosive come in a free box that shit is hot.whish I could get some more it would try to twist your wrist as u shoot it.cant say enough about those guns will punch a hole through about anything especially. The steel core