Proof research camgas - Proof Research PR10 Stainless Steel CamGas 6.5CM Deepfeed Rifle Barrels

I build arto with Aero Preston M5E1 upper and nickel boron bolt. Ran about 60 rounds cleaning 3 times, then changed scope to my Nightforce no’s 5.5-22 and ran it through the these on bipod with bag at the 100 yd range four groups of 5 my best was right at 1/2 inch NONE were over 3/4 in hitting 1/4 dot on each of the 4 5 in targets at least one of the 5 hit the 1/4 center dot. Was using palmetto upper before and it was grouping as large as 5 in. Didn’t know or believe an AR10 could shoot as good as my Preston bolt gun. I am amazed Love it. It is the 24” 6.5 creedmoor. It head spaced perfect with the Areo P bolt. Proof Reserch put out one great barrel