Pioneer2 - welcome to the forum.

While I am not doubting your need for a replacement barrel for your .54Renegade, what conicals have you triedout of that barrel? Also what makes you believe that it needs to be replaced?I have four of them and three of the four will all shoot conicals pretty good. If all your shots were 100 yards and under, I think that the barrel you have could work for you if you find the rightconical. I normally shoot maxiball, REAL 300 & 380 grain conicals,Hornady Geat Plains in 424 grain, and on my next order to No Excuses, I am going to get a pack of the .54 caliber and see if the rifles will shoot them as well.

If you want a 1:28 the GMB is a great one. They come in .50 & .54caliber. I also have a .50 caliber and it is a good conical shooter so far. I am still trying different conical with the rifle but things are looking good.