I had a gunsmith build a 7 mm prc using a heavy contour 26” 1-8 twist carbon six barrel. I have the barrel paired with a kelbly atlas lite action and grayboe Phoenix 2 stock. I have a nightforce nx8 scope and nightforce rings on a kelbly rail. I have 210 rounds through this barrel and have tried several good powders (h1000, rl25, retumbo, n565, n570, h4831sc) with hornady 175 eldx and 180 eldm bullets. I am using ADG brass. I cannot get any load to shoot better than about 3/4 moa. For comparison I reload for several factory rifles and have them all shooting below 1/2 moa. I expected to get Accuracy at least this good from this custom build. The gunsmith bedded the action because he thought the stock pillar bedding on the phoenix 2 was causing barrel deflection, but if anything the accuracy got slightly worse.
My gunsmith is recommending that I have the barrel cryogenically treated to improve accuracy. I have read threads on here that seem to have mixed advice on this and I haven't seen anybody discuss doing this on a carbon barrel, although I suppose it would work the same on the steel portion.
Basically I am looking for any and all advice on what to do. I don't claim to be an expert reloader, but with the success I have had with several factory guns, and the combinations I have tried with this gun, I feel confident that the issue is not with the load but with the gun.
My gunsmith is recommending that I have the barrel cryogenically treated to improve accuracy. I have read threads on here that seem to have mixed advice on this and I haven't seen anybody discuss doing this on a carbon barrel, although I suppose it would work the same on the steel portion.
Basically I am looking for any and all advice on what to do. I don't claim to be an expert reloader, but with the success I have had with several factory guns, and the combinations I have tried with this gun, I feel confident that the issue is not with the load but with the gun.