Originally Posted by Jumpalot
Also, in my research, I've been reading that it would be better to go with a case that doesn't have a belt. Why?
The reason for this is the fact that when a case head spaces off the belt, it is prone to case separation just forward of the belt. After as little as two or three firings, it may
show signs of incipient separation. In other words, it comes down to case life.
This can be alleviated by adjusting your sizing die to let the case head space off the shoulder rather than the belt.
Most FL dies when screwed into the press to touch the shell holder and allow the "cam over," will push the shoulder of the case back far enough that the case then head spaces off the belt. By adjusting the die to NOT push the shoulder that far back, you eliminate the problem.
It helps if you have a head space gauge to get your die set up properly.