Select a hornady hs gage bushing slightly larger than the case neck od. Then use it like normal. This will help if the issue is at the neck shoulder junctionNo new brass to check against but not sure that would make any difference.
The shoulder bulging slightly was a train of thought but I don't know how I would measure this. It did not show up on the sharpie test.
Trimming to an OAL is just asking for the problem you are experiencing, IMO. Get a Wilson (or other) case gauge and trim to that. Get the shoulder set-back right and the neck length right and you cannot have resistance to closing unless the bullet is touching the lands.Thanks once again for replies.
All cases trimmed with Lee cutter to 2.0150" a bit short in my opinion but that,s the Lee Trimmer for you.
No access to a lathe
FC neck OD .292" even trimmed down to .290" with bullet
PPU neck OD .294 with bullet
Will check shoulder angle when I see him next.
Will try sharpie again but first time didn,t show anything obvious.
Didn't check chamber as there was no problem with the PPU and he assured me it was clean. Will revisit this.
I am determined to find out what is happening although mate is going over to the PPU's.
I took several measurements and found that the new cases where larger OD neck size. Headspace slightly smaller. Trimmed neck down so that OD was smaller than Master Round. Still same problem. this round was now smaller than master in every way.
Can you see scuffing from the bolt face on the case head?
I would sharpies the entire case and bullet including the case head.
It has to be touching somewhere.
Cheers.