Lots of guys tout BH209 like it is a god send. It is just the 6.5 creedmoor of muzzleloading. Marginally better I agree, but for average ML shots, all the alternatives work really well. I know plenty of animals that have died to the pre- measured pellets. Nothing wrong with them unless they have rattled around for years and poweder has worn off the pellet. Maybe I should have higher expectations out of my TC muzzleloader, but at 100 yards it shoots 2" groups all day with pellets and loose 777.
With the seasons approaching quickly, I would use whatever you can acquire easily and start developing a load that works for you.