I think a lot of this may be geared toward the cowboy action shooters.
IMR's
Trail Boss cost me $12 for a 9 oz. canister. Shoots good,real clean, good accuracy - low velocity though.
Trail Boss is a relatively new powder developed specifically for cowboy action shooting, and it's priced right. That's why I can't understand the price of Blackhorn. I think it's a ream job.