338 ARC Build Range Report
This video features Caleb and Steve from Brownells conducting a range report on their custom-built AR-15 chambered in 338 ARC. They demonstrate the process of zeroing the rifle and adjusting the Rifle Speed adjustable gas block. The report includes testing the performance and accuracy of both Hornady supersonic and subsonic ammunition at various distances, with a specific focus on tuning the gas block for reliable subsonic cycling. The video offers a field perspective for those interested in the 338 ARC cartridge or building an AR-15 around it.










