The only thing about TC barrels ( with the exception of very early Renegades), is that the rifling is only .005. They were cut that way, and given a 1 in 48 twist, as a compromise to shoot both the round ball and the TC Maxi Ball. They are more accurate with the Maxi Ball than the round ball but the round ball is good enough for white tail hunting as long as you don't try to push it too fast or it will strip the rifling.When you ever get to pulling a ball for any reason.
Just look at it and determine if you can see the thread from the patch material engraved in the lead.
Once you get it started, the patched ball should be able to be seated without excessive force.
That barrel has 8 or maybe 10 grooves in it.