Thread: Split brass

Originally Posted by Marty Henry

I always thought belted cases headspaced on the belt, the shoulder was irrelevant. I can see having it headspace on the shoulder would possibly lead to issues,

The SAAMI dimensions for the 7mm Rem Mag show a headspace dimension to a datum on the shoulder but the tolerance between min case and max chamber is larger than beltless cases. My calcs give it at 0.661mm v the Creedmore at 0.362mm. This together with the tolerances for the belt means there can be a gap between the front of the belt on the case and its recess in the chamber. This together with the lighter cases of some brands is the root cause of the problem which often catches new handloaders out. I think that I have only loaded for one belted case (.350 Rem Mag) and that one briefly. There probably won't be any more.
Regards Grandpamac.