builder459
It looks like an original TC barrel so it will be a 1/48 twist. My opinion only you would be ahead of the curve to go with the GM-LRH barrel in 50 cal.... you have a ton more options with conicals and sabots.
These are LRH barrels on these two TC's... although i know longer have the Hawken stock - traded for another Renegade stock... both of these barrels a 15/16ths across the flats to reduce weight.... You can see that one is a Stainless and the other is blued... I now have a 3rd thanks to
Semi
This a target from one of my first outing with the LRH shooting 460 Bull Shops... Look @ the 90 grain load... and it has been very successful in the field also - a couple of nice whitetails would have been able to tell you that... but they are not speaking right now