I'm getting 1.5" groups with 110 grains of loose 2f, 777 and the 240 grain T/C Mag Sabots in my Omega. I have also tried the 260 grain Dead Centers with 100 grains of 777 and shot about 1" groups(these load incredibly easy). I am not very fond of the pellets so my advice is to try loose powder as you can adjust the load a little better and it is cheaper too.