JonnyNov
I have really been pretty fortunate with my Omega, I am able to load a wide variety of bullets with the MMP HPH-24 sabot and they all shoot really well. I shoot 100 grains of t7-2f. I must admit I do not shoot shockwaves or sst's. I guess I am just to darn cheap - I buy bulk bullets in boxes as if I were reloading and then purchase the sabots separately.
I have been shooting a lot of Speer Gold Dots .452's - they are a bonded bullet, both of them shoot excellent. I shoot a lot more of the 250 grain variety because that is my whitetail bullet of choice. The 300 grain I have set up for elk hunting.
Another bullet that has shown a lot of promise is the Hornady 40mm 200 grain XTP in MMP's blue 40/50 cal sabot. That thing is really scooting - has great velocity and energy- a no sweat bullet out to 150 yards.
Hope some of this helps....