I've used BR-two's in 7mm rem mags with achievements, even in cold temps. But, which was with rather high situation fill of H1000 and Reloder 26, and honestly I choose to use mag primers, they have not been detrimental to having consistent velocities, so it will require away any stress https://z-ndh-tchen-cci-20967901.bcbloggers.com/30933143/a-simple-key-for-federal-100-unveiled