FG, The Omega like the TC Triumph was designed for sabots. Here are some good shooters in my Omega:

300g Nosler Partition HG (Hand Gun)
300g Speer Gold Dot
300g TC ShockWave 300g

Here is Nosler Partition: http://www.the-gleasons.com/noslerpartition300g.htm

Here is SW: http://www.the-gleasons.com/tcshockwave300g.htm

And here is Speer Gold Dot.
Take your pick.Shot with a Crushed Rib sabot, the SW was with supplied sabot.
Best Wishes with this beauty (I love that stock and the SS barrel),
Chap
PS PB shot well in it also, but you know my stand on that subject, so I am not gonna start.