If the barrel has a K stamped on it.. that means it came from a kit. Nothing wrong mind you, as long as the person that did the bluing or browning of the barrel knew what they were doing. I have seen some real nightmare jobs of browning barrels.

In there early years, there actually was a 1-66 twist offered. These were the Douglas barrels I believe. Then they went to the standard 1-48 and have stayed that way. There was shallow and deep rifling models, but I have no idea how to tell the difference in them from a serial number. I think Thompson Center could tell you.

Overall the Renegade is a work horse rifle. They shoot about anything. Mine are all .54 caliber. I shoot roundball out of them and have never had to really worry on deer. Mine also shoot maxiball and REAL conicals well too. My friends mostly shoot my REAL conicals (free bullets you know) but I still stay with roundball for the most part.