The local Sports Authority has several composite stocked. they are a package deal ....Bullets, starter etc. For 65 bucks. Anyone have experience with these...50 cal. My idea is to get for a youngster to start him at the bottom in muzzleloading. I personally have had real good success coaxing hunting accuracy out of cheap muzzleloaders. Would Green Mtn. barrels fit this for a combo gun deal?