I've found that if I use the "small base" dies from RCBS that I've solved all my pump action problems..they work and feed with no problems at all...maybe you have the bullet out near the factory maximum listing..push em' back in a little..your shooting at a volleyball sized target so group size is not all that important, as long as it's under 3 inches you'll hit the ole deer...I'll bet some small base dies will solve your problems.. also is the rotating lugs clean.. a lot of build-up over the years will slow the process down, especially brass shavings.. give her a good cleaning.. won't hurt a thing and don't forget about the rotating bolt..it needs to be decreased and scrubbed from time to time.......