Oskar,
Refresh my memory, I remember you use 9.3x72R donor cases, but don't remember if your groove diameter is .260 or .264" ( the question pertains to the 6.5x58R S&S drilling). If .260", do you size .264" bullets, or do you have a source? Since I use original length .38-55 cases, a .264" bullet "falls" into a fired case. I make an exception to the general "rule of thumb" of using a cup and core bullet that fits into a fired case. The rifling in my BF is very shallow and I am hesitant to use larger than groove diameter bullets in this particular rifle for fear of excess wear of almost non existent lands. It is not that hard to size the bullets now that I have made the die, it just adds 3 more steps to the process( lube-size-clean).
Mike
