BigBuckShooter

Short quick answer, for whitetail, --- 100 grain t7-2f, 250-260 grain projectile, MMP HPH-24 black sabot, Remington 209-4 shotgun primer.

May not be the best answer you will need to do some shooting.

There are several threads on here about the Omega or Encore should be able to find several loads in them.

good luck and have fun