04-17-2017, 11:46 AM
worthen86ford Wrote:Not sure but i'll find out. Its the new hornady black 123 gr factory ammo that came out. I had a couple of sst rounds, factory as well, that i compared to and by the eye they seemed about the same coal. Brother has the rest of the unfired rounds so i'll have to get them from him to measure.
So a couple extra thou on the bolt face wouldn't jam the lands? I'm not asking to be a smart arse just never had this happen. I should have also mentioned that my jp bolt and AA hard use bolt measure around .136-.137" using the same dial caliper.
WF:
LRRP52 is correct. Not a headspace issue. If you want to do a quick check, pull a bullet from the Hornady ammo that jammed and drop the case into the chamber, let bolt go forward and extract. It will extract easily is my bet. Not a headspace issue.
The ogive of the bullet is engaging the lands too much is the problem. A few turns with a finishing reamer will solve the problem.
It will eventually disappear as you erode the throat from shooting but a finishing reamer is a better option.
Or you can seat the bullet a bit deeper. Looking at your picture, I believe this is a viable solution as well, but seating bullets deeper brings with it risk, IF the factory loaded it to a maximum pressure. I doubt any factory load comes near maximum pressures due to liability issues. I would try seating it until it doesn't hang up anymore then shooting one round and if that shot seems to give more recoil, doesn't sound right, and or the primers are flattened / backing out, then the only solution will be a finishing reamer. If you aren't experienced in these sorts of intuitive and observational judgments, go with the finishing reamer.
LR55