gamestalker
member
I threw some loads together today for one of the 7 mags and used some Frontier brass my son found cheap. I did a box of Win. brass and one with Frontier, both using starting charges. The Win were running nicely and all pressure signs were nominal, even a bit anemic. But all of the Frontier produced high pressures, stiff bolt lift, complete primer flow to the edges of the pocket, and I had some extractor pin transfer into the case heads also.
I was pretty sure of the cause, and confirmed it when I got home. The Frontier was extremely heavier than the Win. brass, and I also confirmed internal capacity was significantly less than Win as well. All brass was trimmed to exact same spec.. RP and Federal were also much lighter, and had greater internal dimensions also.
GS
I was pretty sure of the cause, and confirmed it when I got home. The Frontier was extremely heavier than the Win. brass, and I also confirmed internal capacity was significantly less than Win as well. All brass was trimmed to exact same spec.. RP and Federal were also much lighter, and had greater internal dimensions also.
GS