Never poured my own, but I'm interested in casting for my 9.3x62. I would like to make cast bullet loads which duplicate the velocities of my jacketed loads. I like the idea of making my own bullets which will do the same work jacketed ones will do.

Based on a bit of research I'm thinking perhaps a WW gaschecked bullet could be driven at these speeds. What are the common concerns or pitfalls for this sort of idea?