I shoot 250gr Shockwaves w/100gr 777 in my Omega. I have no trouble starting the first or loading a 2nd round. Some of my friends also shoot the same setup and experience no problems. I haven't tried any other projectiles since I'm perfectly happy with the Shockwave and confident out to 140 yards. If I ever get the pics out of my hunting partners camera, I'll post the pic of the 8 point I shot with that load at 140 yards.

Good luck with your Omega, I don't recall hearing anyone dissapointed with theirs. I'm not!