codsterboy,
I should have asked earlierwhat cap are you using? I've had the best luck with CCI #11 magnum's and the RWS. If you are not using one of these caps, I'd try them out 1st.
Also, can you tell us more about when you get your misfires. Are they random, your 1st shot of the day, or after you clean between shots etc.
This info. can help us trace down your misfires.