My 21 inch Green Mountain 1:28 inch twist percussion barrel shoots really well too. I have it on a Renegade. I hope I get a chance to use it this season. I'm shooting 300 grain XTP's with 80 grains of fff Goex out of it. With open sights I have it hitting pretty good out to 75 yards. That's about my safety zone limit with open sights. The Green Mountain Carbine for a Renegade is about the least expensive barrel Green Mountain makes and I highly recommend it.