- Feb 4, 2013
- 28,175
Walnut was fine most of the time, but every so often I'd encounter a case that was very tight when seating the primer. That stopped happening when started running them through the wet tumbler with pins every so often. I can only attribute that to build up of crud in the primer pockets. Everything else remained constant. Same powder, primers, cases, bullets, press, and person.
I use Starline brass and Federal primers. I don't remember having this issue with Winchester primers though. Maybe more build up from the softer Federal primers? Or, maybe you're doing something different with the dry tumbling than walnut and dillon polish?
I tumble in corn cob. With the primers IN the case.
The primer cup covers the sides of the primer pocket. How is crud going to build up there.
Maybe if you decapped first, then tumbled, the tumbling moved the crud.