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6MM ARC is one seriously impressive round from Hornady. The 6 mm Advanced Rifle Cartridge (6×38mm), or 6mm ARC for short, is a 6mm (.243) caliber full-power rifle cartridge introduced by Hornady in 2020, as a low-recoil, high-accuracy long range cartridge designed for the AR-15 platform rifles.  Moriarti's 6MM ARC Rifles are finally available! So far they come in 18 inch barrel lengths. Best for benchrest s... Read more