Both Keith & Cayugad know their stuff. Harvester plastic sabots (50-pks) load pretty decent in the Omega when using the .429 or .451 XTP bullets. The 348 Powerbelt usually provides the best accuracy out of all Belt bullet sizes. Bullets other than the Powerbelts & Buffalo S.S.Bs that load easy in the Omega include the Precision 40/50 Extended Range, Dead Centers & QTs -- Harvester Sabertooths -- Barnes 40/50 200 gr Spitfires & Nosler sabot/bullets. T/C-packaged bullets used to load easy.... not anymore with their new packaging/new thicker Hornady plastic sabots supplied with their bullets.

Go to google.com & do a search on each of these bullets. Midsouthshooterssupply.com has the Noslers, Sabertooths & Spitfires. PRbullet.com has Precisions -- Cabelas & others have the S.S.Bs. I don't know how much longer Barnes will be making the 200 gr Spitfires undersized. Last ones I checked were between .450 and .4505. They load pretty sweet -- shoot accurately but need alot of speed (120-150) to shroom' properly.