FatOldMIHunter
Well-Known Member
The shoulder of the case on the left is crinkled. I'm not sure how well it shows up on the image, but the case on the right is smooth all around the shoulder. The case on the left is more like an octagonal cone. I'm assuming that if I reload and fire it, it will form to the walls of my chamber, but I'm wondering if this is a bad idea. Is this a symptom of over-annealing?
I received these cases from a friend. I don't think they've been fired more than 2-3 times. So far, about 15% of the cases are crinkled. Cases that were smooth before full-length sizing stayed smooth and cases that were crinkled stayed crinkled. I did not anneal them. They were like this when I received them. If it matters, they are 7mm RM brass made by Remington. I've never seen anything like it on any of my other cases.