I can think of three possibilities:
- Make sure that the case mouth is flared enough to give the bullet base a clean start (not catching on the edge of the case mouth).
- Check the depth of the seating stem. If it's set too deep it may be trying to push the bullet deeper in the case while it's being crimped in place.
- Look closely at the crimp. If it looks a little flattened rather than a smooth curve into the crimp groove you may be over doing the crimp.
|