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  1. D

    6x45

    Thanks 5spd. Gonna try this soon. This is a new upper with a heavy stainless take off barrel. Gotta see how it cycles. May need larger gas hole but think I'll be okay. Can't find blc2 and don't wanna use my 4064 in this. Our supplies are limited here in central VA.
  2. D

    6x45

    Anybody know any data for 6x45 with 55 grain ballistic tips and 748?