HUNT4ME- I have the same gun and have had a identical experience. Two years ago with the new gun...too tight to load shockwaves easily. I also couldn't get barnes 245 spitfires to load which really bummed me out. After some JB sessions and starting to try a variety of different sabots (rounds and rounds and rounds) I have tried the original "tight" loads and my omega can now handle shockwaves again and pounds nails with the spitfires. At one point I thought it was due to switching to kleenbore primers (which may have helped a little) but having come full circle I believe it has more to do with JB's and high usage breaking in the barrel. I feel this way because when I bought the gun I loaded up on barnes spitfires and was disgusted when they wouldn't fit. Now these same exact projectilesI bought 2 years ago load and group like they should.

The 3 petal MMP's with a 300 gr Gold Dot or harvestor sabots (crushed rib and regular) have worked well for me during my experimental phases. At one point I thought I'd have to shoot crushed rib sabots forever but this is no longer the case. Tom