The only heavies that I have on hand are the Crosman Premier heavy dome. They shot better than the cphp's, but the RWS superdomes seem to do best for now. I plan on messing with it some more next week to see what I can do. I did notice when I run a pellet through it's bore, the bore feels loose around the breech, hits a rough spot about 3-4" down, loosens up a bit and then hits the "choke" where it is tighter again. I would venture to say this barrel is a POS and a new one would do me wonders. I just hate to have to machine a new breech all over again. BTW Gene, I have never done well in Vegas either. Now I just walk in to a casino, drop my money on the floor and walk out.