Looking for Expertise on T/C Omega

I decided to step up to the 21st century and bought an in-line T/C muzzleloader for my shiras moose hunt this year in Colorado. I cut my teeth on the T/C "Hawkins" 25 years ago and have taken many elk here in Colorado with it.. I'm looking for suggestions on powder and bullets to knock down a critter of this size with my new T/C Omega.......Oh yea, we can't use sabots here in Colorado, so I'm out of luck on those[:(]