First off never buy a muzzle loader with out shouldering it to check the stock fit and trying the trigger pull to see if you can hold the sights steady on the target and set it off. The fit of the stock and the trigger pull are the most important elements to good hunting accuracy in the field.
Look at the low priced TC muzzle loaders and the Accura before you buy try the triggers in particular. One of the reasons I say that is because one of our club members has a wolf it seems to be a reasonably good gun except I do not know how any one could hit anything with that trigger, and none of the gunsmiths around here will work on a CVA.
For a low priced gun the Omega Z5 would be my pick But the Impact is often lower price.
Most of the old timers here don't have any use for power Belts as they often fragment especially with loads like the one suggested, they are very expensive and much better loads like the Deep Curl and Lehigh bullets as well as the barns and for medium loads the XTP bullets are excellent if you want a sabot-less load try the Hornady FPB in 350 gr with 90 gr of powder. Pyrodex or Blackhorn are very good.