I'm setting up my dies to start loading .38, and I'm not sure if I'm setting up the roll crimp properly.
What I'm doing is seating the boolit until the case mouth is just past the crimp groove, like so:
Which gives me a COAL of 1.520. Then I take out the seater plug and start turning in the die body an 1/8 turn at a time until I get what I think looks like a good crimp.
However, the problem I'm having is that the boolit is being set back 0.018" and there is a 0.003" bulge where the crimp rolls over compared to where the rest of the boolit is in the case. Backing the die out 1/8 turn still has the 0.003" bulge, and the crimp doesn't look adequate. Either way, the rounds chamber fine in my revolver.
Edit: Last night when I first tried setting up the dies, I was setting the initial seating depth at 1.500 and got the same 0.018" setup and bulge. The boolits are sized at 0.3578".