Thread: Brass splitting

Originally Posted by tibo

Yes they split at the shoulder. I’m pretty confident they were not over annealed I do it in the dark and stop when it just turn dark/cheery red. Never had issue with my personal stuff using this process.

These cases have been stored for years in his garage, they were a bit tarnish could it be corrosion?

You dont need to anneal in the dark. Probably unwittingly over annealed. The force of the die has pulled the annealed part of the case away from the bottom.