02-22-2022, 06:26 AM
(This post was last modified: 02-22-2022, 08:59 AM by Bat Rastard.)
Thanks all, and especially Klem!
The case separated at the base.
I inspected several other cases with a paper clip. After about 20 of them I thought I found something in one of them. I sectioned the case, and I couldn't see anything because it was black in there. I tumbled the pieces and there was a shiny ring at the base. (which is where the other case came apart) I took the sectioned cases to work and examined them under magnification and found it was indeed cracking there! A co-worker, whose job it is to find cracks in metal, agreed it was cracking there.
I believe the mystery is solved!
I do measure headspace and size appropriately. That brass had only been pushed back .0015" and annealed often.
The case separated at the base.
I inspected several other cases with a paper clip. After about 20 of them I thought I found something in one of them. I sectioned the case, and I couldn't see anything because it was black in there. I tumbled the pieces and there was a shiny ring at the base. (which is where the other case came apart) I took the sectioned cases to work and examined them under magnification and found it was indeed cracking there! A co-worker, whose job it is to find cracks in metal, agreed it was cracking there.
I believe the mystery is solved!
I do measure headspace and size appropriately. That brass had only been pushed back .0015" and annealed often.