10-29-2021, 08:35 PM
My understanding of the minimal shoulder bump is to reduce unnecessary sizing of your brass. By fully sizing to SAAMI rather than a couple thou can extend the life expectancy of the brass. The reason for sizing shorter in gassers is for reliability.
Two ways to check that I know of with a gas gun....one is at the loading bench with a dummy and the other is anywhere you are comfortable racking one in. I don't worry too much about getting a few extra loads from my brass for this cartridge, brass isn't plentiful currently but 6ARC is far from boutique status and relatively available. If I had to put in a bunch of time like neck turning and stuff, maybe so, but for me I just bump back 0.005 ish and run it.
Two ways to check that I know of with a gas gun....one is at the loading bench with a dummy and the other is anywhere you are comfortable racking one in. I don't worry too much about getting a few extra loads from my brass for this cartridge, brass isn't plentiful currently but 6ARC is far from boutique status and relatively available. If I had to put in a bunch of time like neck turning and stuff, maybe so, but for me I just bump back 0.005 ish and run it.