ORIGINAL: Roskoe
I'm somewhat surprised to 295 Powerbelts shoot that much higher than the 300 grain Shockwaves. Would expect the impact to be pretty close with the same powder charge.
My Omega is difficult to load sabots also. I finally found that 300gr. SST bullets in Harvester short sabots will load sort of OK. I did find that with 90gr. of Black Mag'3 the 300gr. SST and 295gr. Powerbelt hit within 1/2 inch at 100 yards. Some of the Omega barrels seem to be difficult and some are not. I polished mine with bore paste and that improved it a little. Mine is a stainless .50.