Fire forming brass for a wildcat caliber. I was using a fast burning pistol powder and filled remaking space with tissue paper.
Day prior I tested about 20 different loads to find full brass expansion.
Day 2, once I found the right charge, I was “quickly” working through the process.
I wasn’t aiming (my face was not against butt stock) just point towards a berm on our property.
6th round. Complete distraction.
In retrospect. The 5th round didn’t sound right. But when you’re in a hurry you’re not focused.
Should have double checked my second guess. Measurements and Specs.