Well, when I first bought my encore I had problems with it. And it was a 300 win mag. It wouldn't shoot a group worth a piss! I sent it back to tc a total of three times the third time I had them send me a 7mm Rem. Mag. barrel back instead and they did. I sold it and order a 7 mag barrel from bullberry. I have also got a .45 caliber muzzleloader barrel that I have got trouble with that I have sent back to them. It had the 1:20 twist in it. They sent me a new one back that is suppose to have a 1:28 twist in it, I still haven't been able to find a good load that will shoot good in it yet.