Richard, mine shoots any lead that will fit. It may be more accurate with one over another, but i have not really "tested" it. I like to hit near the center of the paper targets, and i'm happy to hit the water bottles that Jdupre' ties up out in the swamp where I can hardly see them and I'm forced to just shoot at a bright spot amongst the trees. It seems to hit acceptably with any pellet.
I"d like to replace the breech assembly with metal and get rid of some of the plastic parts. That may happen when i can get around to it.
I have not done any magic at all, just put the scope on it. What do you suggest?
By the way, my hair is already gray, so I try not to worry about some of the small things, like repeatedly putting .177 pellets into .25" holes at fifty yards. Making pop cans dance is OK with me.
piper