Need help, I've been reloading for 30 years with std RCBS dies (lots of calibers too) with no problem, until I got my 357Sig dies!
Problem: bullets tend to move under recoil no matter how I crimp or size the neck.
Two possible solutions have come up:
1) pay for a custom "Lee Factory Crimp" die (if it is possible to make one for such a short cartridge)
2) roll a cannelure in the bullets (don't have a clue how to do this or what the equipment cost)
Anyone have any other ideas or a source for an inexpensive cannelure swager.
How about a 124gr JHP 9MM bullet that already has a cannelure in the right place so that the OAL wont exceed 1.140 ??