223 hard chambering question

[DLT]

Maybe. Some pretty thin margins, though, for that to be the case.

It was the case. I went back to some starline I had fired in same chamber, loaded them and all chambered fine

 

[DLT]

A hard doughnut, combined with brass that was a bit overly annealed led me to the condition the posting fellow is having. When the doughnut was pushed, it caused an expansion right at the crease of the shoulder - just enough to create the hard bolt. Taught me two lessons with one problem.

Yep. I guess I will sell the new lapua I bought if it’s going to do that man that sucks. I do have a bunch of firings on it though