Here is a pick of a target I shot with my Omega just after I got it. It was also part of my Christmas. The load is 100gr 777 pellets with a TC 240gr XTP-MAG bullet. Cabelas hasthe Hornady .430 240gr HP-XTP's $11.99 per 100, .452 240gr XTP-MAG's $13.99 per 100 and Harvester Sabots $5.99 per 50. The bullets are in the reloading section under components. The sabots are with the BP stuff. Even with shipping included, this brings your cost to about 25-26 cents a shot. The only thing cheaper would be a 22 rimfire. These all will work well out of your Omega to practice with. 777 Powder is a lot cheaper to shoot than pellets and you can fine tune your loads better with powder. I also like 777 powder better than Pyrodex. It is a lot less corrosive. You don't have to clean the gun right away with 777. Be aware though that you will probably need to swab with a wet patch(50% alchohol/50% window wash) between shots when using 777. 777 leaves crud in the barrel that could make it hard to load a sabot or possibly get a sabot stuck in the barrel. Also a fowled barrel will have a different POI than a clean barrel. The DVD that came with your gun should help you out a lot. I really like the TC Shockwaves. The 250gr Shockwave is going to be my main hunting bullet. I have another ML that I am setting up exclusively for short range stuff and I will be shooting 300 gr XTP Mags out of it. There are a ton of Omega shooters on this forum. I am sure you will have a lot of responses to your post. Hope you like your Omega, I love mine. I put a Sims recoil pad on mine. It is a lot easier on the shoulder now.
The flyer to theleft was my fault not the gun. The group to theright was a three shot group at 25yds.