I'm no expert....however I had some major problems with my 15" T/C 460 barrel. It would not group any smaller than 3-4 inches at 25 yards. That put it " not on paper " at 100 yds. I sent it back to them , they sent it back saying it would group 1 1/2 at 100 yds with Corbon ammo....I didn't believe them. I spent a lot of money on ammo, mounts, scopes....and massive amounts of time....it would not group for me. After some urging by a friend, I sent it back to T/C ...with an attention to a particular individual that Fox Ridge gave to me....after sending it in a second time, I got a new barrel with an apoligy note . After seeing that this barrel appeared to shot, I sent it in Fox Ridge, they shortened to 12 " and added their "muzzle tamer " to it. Now I got something ! I have never got around to actually shooting it at 100 for accuracy, my scope started sliding in the mounts...haven't fixed that yet. Now I'm shooting a 357 Max, much nicer to shot....and deadly at 100 yds ! Only my nonexpert story !