Processing a bucket of 223 I picked up in trades recently I ran across a few shells that wouldn't start to enter the sizing die. I thought maybe they were berdan primed and it was the decapping pin hitting that was stalling things but looking at it I realized they weren't making it that far - they were hitting resistance just as the shoulder hit the die body. Looking closer, the cases are hugely overstretched, like they were fired in a much larger chamber. Maybe a Valk, or a Grendel chamber. I just shook my head, tossed it in the scrap bucket and moved on figuring it was a one time "oops" on someone's part. As I went on though I found maybe a dozen more out of a 5 gallon bucket. Whoever hit the "oops" wasn't exactly a quick learner!
Anyway, for kicks and giggles I did force a couple of these into the sizer but about half way up the resistance was just getting too great and I didn't want to get one stuck so I stopped. Probably could force them by sizing in small increments, being common brass it just isn't worth the risk or the headache. Take a look though, let me know what you think happened here. I ran em through the polisher this morning to make for pretty pictures.
Anyway, for kicks and giggles I did force a couple of these into the sizer but about half way up the resistance was just getting too great and I didn't want to get one stuck so I stopped. Probably could force them by sizing in small increments, being common brass it just isn't worth the risk or the headache. Take a look though, let me know what you think happened here. I ran em through the polisher this morning to make for pretty pictures.