I just got a Kreiger gain twist 8.7" to 8.3" 28" finished length 1.250" for 5" then tapering to 1" at the muzzle. The guy I got it off of has won all kinds of records, etc. and wouldn't do a prefit. I understand his reasoning, his name is on this barrel and he cannot control the outcome if someone else headspaces it. Prior to this, I wouldn't have gone this route, I would have just got a prefit and been done and did it myself and saved a few bucks. I decided to go Nut-less, 6BRX freebored .112 for the VLD's. After my 1st year of learning F class, I wanted to pick up any accuracy,etc that I could so it was worth it to me. May not be for everyone, but that is why this is America!