Fwiw guys I did talk to Melvin sometime back and he did say the barrels weren't bad. Bi have three girls all with clrs in 270. They did have issues with the firing pin springs, but a local Smith put remington springs in them and no issues since. Melvin did say it wouldn't work, but it seems to. Other than that, id still like to have Melvin do the conversion to add his "stank" to it. My thoughts are, if he thought they were total junk, he probably wouldn't do his thing to the colts at all.