Just a possibility,
Oncce upon a time I was trying to call coyotes. No luck and no luck and no luck.
After about 6 stands, unloading and loading every time with an ar-15, same shell every time, The last time I unloaded I found the bullet setback into the case enough that the bullet ogive was almost into the case shoulder, almost rattling in the case.
I never shot that one but often thought that it could have been a catastrophic event. No way we'll ever know but it would have been hard to diagnose for me.
Now I crimp my 223 better.
