Gman
Gold $$ Contributor
I just started loading the new Berger 108 BT's in my 6BR. When I was shooting the Berger 105 VLD's with "3 or 4 times fired Lapua brass",neck sized & shoulder bumped with Redding body die) I would not get signs of pressure till 31.9 gr. of RL15 on an 80 degree day.,cratered primers, round ejector mark on headstamp) Today I shot the Berger 108 BT's with 31.0 gr. of RL15 up to 31.4 gr. and I got the cratered primers/round ejector mark at 31.4 gr. It was 60 degrees while I was shooting. I am using the same lot of Lapua brass, RL15, and CCI450 primers. My question is, was the NEW, UNFIRED, UNSIZED, Lapua brass the reason I got signs of pressure? Or, since the Berger 108 BT is 3 gr. heavier than the Berger 105 VLD, that is the reason my pressure went up? All bullets were jumped .010 to the lands.
