I own and love both the 52 & 82 but they are different tools for different jobs. the 9x18 is a great little round for a concealable pistol while the 7.62x25 is a powerful, fast and longer range round. The 7.62x25 flies about 1500fps from most military loadings but can be reloaded way faster. I haven't chronigraphed them yet but the book says my 90gr jhp should go about 1800fps. I would love to have a rifle chambered for it to see what could be rung out of that caliber. even thought of getting a semi auto ppsh but don't think they would be very accurate. best bet would be re chambering and barrel on a 9mm carbine. if it would withstand the pressure.