greenswampthing
I have an older Omega SS and it is prbobably a looser bore than you might have. So the search that Tom was talking might apply.
Personally I prefer the .451/.452 bullet to a .430, bascally becuse the a far more sabot options for the .451/.452 to match to your bore.
If you are shooting whitetail and under 175 yards) I might suggest a very simple bullet sabot combination for you. Look at a Hornady .40 caliber 200 grain XTP in either a Harvester 'crush rib or MMP Blue 40/50 sabot.
I personally shoot a .451/260 grain Nosler partition in a MMP HPH-24 from mine for deer and switch to a .458/300 grain Nosler for elk. I shoot 110 grains of T7-2f...
ALTHOUGH!!!! this year if I were to use the Omega I would probably shoot a .40/200 grain Lehigh and for elk a .459/277 grain Lehigh for elk.