I have tried the 30-30 fire forming and using 38-55 brass for jacket bullets but the case walls seem to be too thin. Will a lee 375 H&H collet die squeeze the upper part of the brass correctly to hold a jacketed bullet?
I ordered the Lee 379-250 die along with a lee 377 sizing die but I just wanted to figure out how to load jacketed until the day someone actually makes 375 win brass again.
THanks