The Hyper rounds would be accurate if Hasbeen had put in a hop-up unit, but they decided NO, you don't get that privilege. Detroit Nerf/Detroit Dart Talks has a hop-up unit for the Rush-40, which I would recommend over Drac's. The Siege-50 & Mach-100 both have massive barrels that are much too large for a hop-up to be developed. Without said hop-up, using balls as ammo generally SUCKS, and the ammo is about as accurate as Elite Darts.