I have loaded 12,20, and 28 for years.
On PW progressive machines.
just now starting on 410 with a Versa Mec.
Having a lot of trouble with the case mouths of RP hulls splitting when dropping shot.
All the fingers on the wad guide are present.
Any suggestions?
Also I'm trying IMR 4227,
Any suggestions for newer powders?
Not enough room for the shot column.
any clues on wad pressure?
Thanks