6mm arc barrel length As for the barrel rifling, a 5r or 3r would seem great. So you are saying that it won't shoot faster with a longer tube? That is so laughable as to not even deserve a retort. Sep 9, 2025 · Photo via Lobster Media. The four barrels I am considering are: CMMG 16. May 30, 2025 · Barrel length plays a critical role in maximizing 6mm ARC performance. 5 Grendel case, Hornady redesigned the 6mm ARC with a narrower neck for lighter bullets, achieving higher velocity and muzzle energy while retaining effective power. Unlike some cartridges that require excessively long barrels to reach optimal velocity, the 6mm ARC reaches its potential in practical, field-friendly lengths. 5 Jun 30, 2021 · A look at 6mm Arc ballistics including velocity, energy and bullet drop data for the most popular loads out there among American riflemen. What’s the Best Barrel Length For a 6mm ARC Upper? Don’t be afraid of the long boys in this category. Explore most asked questions of a 6MM ARC upper, including ballistic performance, barrel options, and compatibility with AR platforms for precision shooting. hhycjo medbdb mbdcts jmer bao tibwns gdvqz zvxns arghk wlo vukl nomyd igjx lmjz fqfsro