TWANG,

Unless you plan on removing the iron sights, I strongly recommend the medium rings. If the scope does not clear the iron sights, you may not be able to get the scope forward enough on the Omega to provide a safe measure of eye relief--something very important on a muzzleloader. I have Leopold detachable QRW high rings on my Omega. These rings enable me to get the scope forward enough to provide me 4 inches of eye relief and give me a clear view that is unobstructed by the iron sights. Another plus is that the front of the scope clears the rear sight by just enough to allow me to easily get the scope cover on and off my scope.

Good luck and good shooting.

Best Regards,

Sky-Dogg