Just wondering if anyone can offer some insight into this: I've recently acquired an MOA pistol in 6PPC, it's a .262 chamber, 15-inch bull (1-1/8 diameter barrel). Presently using Norma 6PPC brass, not turning the necks as they appear to be correct thickness, etc. I have also "made" brass from 6.5 Grendel, turning the necks from .008 to .0095. I shoot either Speer TNT 70 gr. or Sierra 70 HPBT Match. Load is 25.4 grains H322 Extreme lit by either a Federal Small Rifle or Winchester WSR. Bullets are seated well off the lands, jumping .005 to .010.
I have worked this charge up from minimum and it shows no excess pressure signs at all, fired cases of all iterations fall out on opening the action, no stiff operation at all. This is a crazy accurate load for my purpose which is just varminting and some casual bench shooting. It has put 5 in a .30 hole and usually 5 go into one ragged hole, (100 yds.).
The issue is primers blow out flat with very little sign of a firing pin indentation. I can find no reason for this, everything seems "right", and there doesn't seem to be any excess pressure anywhere else. No blown heads or primer set back. Am I missing something or do I have a real problem here? Thanks in advance!
I have worked this charge up from minimum and it shows no excess pressure signs at all, fired cases of all iterations fall out on opening the action, no stiff operation at all. This is a crazy accurate load for my purpose which is just varminting and some casual bench shooting. It has put 5 in a .30 hole and usually 5 go into one ragged hole, (100 yds.).
The issue is primers blow out flat with very little sign of a firing pin indentation. I can find no reason for this, everything seems "right", and there doesn't seem to be any excess pressure anywhere else. No blown heads or primer set back. Am I missing something or do I have a real problem here? Thanks in advance!
