coldboreshot
Silver $$ Contributor
I reiterate, DO NOT use primed brass when using chamber length guage.Being that its a semi-auto, you need to set shoulders back generously anyway. There should be enough chamber length. If you want to double check before trimming 1000 pcs, Brownells sells a chamber length guage. Soft metal plug that goes in the neck and you chamber the brass case. Extract and measure. Just follow instructions and pop the primer out first unless you have other stripped brass. The chamber length of my Stiller Tac30 with Obermeyer barrel is 2.046". Cut with Saami spec reamer. The Sig barrel should be chambered to Saami spec as well.