I have utilized BR-two's in 7mm rem mags with results, even in cold temps. But, that was with pretty high case fill of H1000 and Reloder 26, and Actually I prefer to use mag primers, they have not been harmful to receiving dependable velocities, so it takes away any stress https://z-ndh-tchen-cci-25068911.bloggerswise.com/38544676/the-cci-br2-primers-diaries