I own an Omega and shoot it along with my Triumph and Endeavor there are a few things I can recommend. The Shock Wave bullets are a stand by for accuracy, all TC inlines do very well with Blackhorn powder and normally are machined so that the Win 209 for reloading is the best fit.
Get some Hoppes Elite cleaner [not the copper remover] and patches along with a range rod and an extra jag to put on your ramrod for hunting.
Clean the gun before you load it get all the oil out and the do not swab or clean any more until you are finished shooting this powder is most accurate that way.
You want to use a sabot that is tight enough to have to use both hands to push down the barrel but not so tight you want to pound on it.
Try the Short Black Harvester if that is to tight try the Crush Rib.
Normally 100 or 110 grains will group well but after you get the gun broke in you may want to go up or down 5 grains at a time. This gun with the right load and an excellent shoot should be capable of 1 inch groups at 100 yds.
Personally I use the Bonded Shock Wave for hunting and have excellent results if you chose to use some of those over priced bullets that's up to you I have tried most of them and they do not kill deer or boar a bit deader than the bonded Shock Waves which shoot exactly the same POI in my guns as the cheaper Shock Waves the FTX also is much lower price and in the 250 grain weight they all shoot the same POI.
I recommend you get square away with the Shock Waves get them shooting tight groups then compare what ever else you wish for accuracy and if you should decide to use Shock Waves to hunt do use the bonded ones the hold together for deeper penetration if you get a long angle shot. If you need help with the sabots e-mail me.