Ages ago I bought a bag of 100 once fired 223 cases (or so I thought), and I finally got around to processing and loading them up. The issue is that at least half of them don't want to chamber properly in my Howa 1500. They range from the bolt being a bit stiff to close to being very difficult to close. I shot about 15 rounds before I struck a few that were really difficult and decided to pull up and investigate the situation.
The cases are head stamped LC 09 and LC 10, which some googling tells me is Lake City brass and according to the yanks its supposed to be good stuff. I think it might be 5.56 brass, but its not marked either way. It seems odd that some will chamber no worries and others won't though. I did full length size and trim them before loading and the cases I did fire don't show any pressure signs that I can see. Not a particularly hot load, 25gns of ar2208 with a 50gn Hornady VMAX.
The cases I have fired chamber ok so I guess I fire formed them inadvertently?
I don't think its an issue with the rifle as I've fired a range of other brass with no issues.
Is it worth messing around with this stuff or should I get out my bullet puller and move on?