bbbagman,
I have 2 Omega's.... the one Idescribed in previous threadand the other is a .45cal. S.S. laminated like yours. They are both shooters! I use Winchester primers and "yes" I get a crud ring using 777. It's not bad as long as you use short strokes towards the bottom w/damp patch. I clean between each shot.
I don't know why, but I haven't had much luck using the the shockwaves or SST's.....must be me?? When I do shoot them, I have better luck with the 300gr.bullets.
Have you tried the 777 pellets out of your Omega?