I have two Omegas. One is about 3 yrs old and has a quite a few rounds through it. The other is a few months old. I use the Harvester regular green sabots in the older Omega and the crush rib in the newer Omega. The newer Omega has a tighter bore. Not sure if that will change after a few rounds are put through her.
Any case, have taken a doe and a 6 pt this year with the .430 240gr xtp. That bullet has never let me down. Every shot has been a pass through. 90gr vol. B209.