Home Forums Hunting & Shooting AR and Tactical Rifles XM68GD Trajectory/B-C questions: Speer gold dot 90 grain

I chrony'd the factory ammo last year from an 18.5" 6.8 Ruger Ranch Rifle. It was 2550 fps. I haven't out of my 16" AR but it should be 2450-2500. The BC is .400 so it retains velocity.

I reloaded 120 SST with 29.5 of H335 and TAC to a COAL of 2.95. They chrony'd 2440 with H335 and 2400 with TAC out of 16" barrel.