Benjamin Maximus

Dixieduo, having never seen or held one in person I can't give you specifics but I'd suggest pulling the bolt and hammer out of the gun and finding the rough contact points. You could then polish these spots with fine sandpaper, like 800-1000 grit and reassemble the gun. I'd suggest going lube free on the hammer and using a moly type lube on the bolt. Just a thought...
Jimmy
 
My Discovery's bolt handle threads were just a bit too long and protruded from the far side of the bolt. I removed the handle and filed the threads shorter which helped some, though I think the protrusion had galled the breech so it was never silky smooth. If you put a nut on the threaded part before you file the threads it will prevent thread damage. Definitely leave the hammer dry.
John