Mine is my .58 Renegade with a barrel made by Bob Hoyt. It has a 1:66 twist 32" and a T/C lock that has been with me for 30 years. Its been on a few different flinters because it is the fastest lock I've ever seen from T/C. That lock besides being fast I took apart and polished all the surface contacts coupled with the way I have the trigger set help a lot in the accuracy dept.