Depends on what you want to shoot with it.
For long range and fine accuracy I load my Omega with 150 gr of RS [or 3 pellets] and a 50/40 200gr Shock Wave.
It will shoot quite nice groups with 200 gr XTP and Blue sabot also.
I load the 250 and 300 gr SW,Gold Dot and Xtp depending on what I want to shoot. These I load with 120 gr RS. Lee