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300 blk

  1. Rifles and Rifle Cartridges
    Ran into something I have never had happen before in 40 years of shooting. I just finished building a .300 BLK. Took it out for a test fire using Remington UMC 120gr OTFB Supersonic ammunition. The rifle fired well. However, after picking up my brass, I noticed a full 70% of the brass was...