I am not a "novice" reloader ...although after today's incident...I may need a refresher course! I assume I had a severe spike in pressure...would appreciate some "experianced" comments.
Working up a load for my 260 Rem and decided to try some 120gr Sie MK's using 46.5 gr of H4350. Brass is Nosler custom which had been fired 1 time. CCI BR-2 primers.
First 5 shot group was set 10 thou off the lands and measured 0.6" C to C @ 100M. Temp about 0C. No pressure signs.
When I ejected the second round in the second group which was set on the lands, the primer literally fell out of the case! Needless to say, there was no second group!!!!
At home, I checked all 50 pcs of this nearly new Nosler brass and found that the primer pocket on the "bad" piece was so loose, a new primer would literally fall out. Another 13 pieces took "moderate" pressure to seat primers, and the balance of the 50 were all "tight"
I assume this must be a pressure issue?
Working up a load for my 260 Rem and decided to try some 120gr Sie MK's using 46.5 gr of H4350. Brass is Nosler custom which had been fired 1 time. CCI BR-2 primers.
First 5 shot group was set 10 thou off the lands and measured 0.6" C to C @ 100M. Temp about 0C. No pressure signs.
When I ejected the second round in the second group which was set on the lands, the primer literally fell out of the case! Needless to say, there was no second group!!!!
At home, I checked all 50 pcs of this nearly new Nosler brass and found that the primer pocket on the "bad" piece was so loose, a new primer would literally fall out. Another 13 pieces took "moderate" pressure to seat primers, and the balance of the 50 were all "tight"
I assume this must be a pressure issue?