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  1. mturner25

    Barrel rifling

    I just recently purchased a Bushmaster AR15 A2 rifle. Can't wait to get out in the next few days on the farm and target practice a little. Hate to show my ignorance on the subject, but all we had when I was coming up on the farm was the old double barrel shotgun, several pistols and rifles. I have heard different versions, but really what is the significance of the barrel on the gun being " button rifled 1 turn in 9 in with a right twist - 6 lands and grooves. " ? Also, I have been looking at a wide range of prices for the cartridges that go in this rifle. Does anyone have any suggestions as to what would be the best name brand cartridges for this new rifle or does it really matter? Thanks