Illini...I've been reading your posts on your Omega....I helped a gentleman set one up last week...He didn't want to mess with loose powder either...I used 2 Pyrodex 50gr pellets and a 250 Shockwave...We ended with about a 1 1/2 inch group at 100 yards...As he doesn't plan to shoot past 100 yards, we left it alone...The Shockwaves do load tighter in his Omega than in my Knight but it wasn't bad...If you want to try another load...pick up some 240 or 300 .44 caliber Hornady XTP hollowpoints (green sabot)...I didn't have any on hand but because these are thicker sabots and .44 instead of .45 they should load a little easier in the tighter Omegas....

I have my Knight shooting with 90 grains loose Pyrodex...sighted 2 1/2 inches high at 100 yards and only an inch or so low at 150...The biggest advantage of the Shockwave/SST design is the aerodynamics of the bullet...they are sleaker than the hollow point, pistol bullets we have been shooting for years so they shoot flatter with the same powder charge....
I don't care for PowerBelts as they drop like a rock past 100yards, tend to be inaccurate in my Knight, and I have not been impressed with the penetration on the deer that I have seen killed with them...That being said...My brother loves them...He uses the 295s...

Remember 2 things with a muzzleloader...1) Every time you load it you are hand loading that round....Much can be done to make sure it is the most accurate round for YOUR gun...For the first year just stick with the pellets and try to be consistant with the amout of seating pressure you put on the bullet...2)Every time you load that gun...You are making a bomb....So pay attention!!! Don't be distracted and do something stupid....like loading 2 bullets on top of the powder...Or not pushing the bullet all the way down to the powder....Or doubling up on the powder....Take your time...Have fun...
Check your "witness" mark after each loading...If you think you loaded the gun improperly...remove the breach plug and push out the charge...Doesn't take but a few minutes...Good Luck...