http://www.dixiegunworks.com/product_info.php?products_id=12474&osCsid=e5b4 443dbbafe7fd4321b9aca065cbdb
http://www.dixiegunworks.com/product_info.php?products_id=9515&osCsid=e5b44 43dbbafe7fd4321b9aca065cbdb
If you don't mind casting your own and saving some money and getting another hobby, Dixie has two different molds. The second one is both roundball and conical mold. They say for a revolver but I am not sure it there would be a lot of difference between the two...
The first link is fora hollow based conical. Those are normally for a rifle. Whether they would work in your rifle is hard to say. And the twist most of the small calibers come with is 1-48.I heard somewhere that is like the best all around twist speed for the small calibers.
I personally have been itching to get a .40 caliber Green Mountain Barrel for my Renegade, but promised after the last two barrels I would not get more barrels for a long time. Of course that seldom stops me.
Good luck with your rifle.