Thread: Split brass

Originally Posted by nigelp

I am only bumping shoulder by 2or3 thou, should I just be neck sizing

Greetings @nigelp,
How are you measuring your shoulder bump? It takes a lot more than 0.002 to 0.003" of shoulder head space to crack a case like that in three shots. Belted cases can be an absolute pig for head separations due to the belt recess in the chamber being too large for the actual belt. The case can still chamber hard with the shoulder sized to fit in the chamber. The only fix for this is to size the case body just in front of the belt separately from the rest of the case. There is a special tool for this but a friend got by with his .308Norma Mag by using a .300 Win Mag die that only sized the base. Some case makes can be bad for this. Others should be able to comment further on this. There is a reason that all the latest hot shot cartridges don't have a belt.
Regards Grandpamac.