This might belong in the Handloading forum.... I don't know. Anyways, I've read that the original .357 Magnum was an entirely different beast from what it is today. That it would shoot clean through an engine block. Three things 1. Is this true ? 2. Can a handloader replicate this performance today ? 3. If No. 2 is possible, will a GP100 tolerate an extended usage of it ?