Hello, new poster here. I just got some BH 209 and tried it for the first time in my Triumph. We have to shoot open sights in CO and I'm using the stock FO sights so it's hard to say just how accurate the load is, but I shot some groups with 80 grains 777 followed by 80 grains BH 209, both using 348 grain ATs and the BH209 shrank my groups noticeably. Sportsman's Warehouse has it for $29.95. Also, on the hangfires you guys may know this but their website says not to use 209 primers made for specially for 777 or muzzleloaders, use a full-power shotgun primer. I had no problems with hangfires.
Cleanup seemed to take about the same number of patches as 777, but there was much less hard residue in the barrel and it was much easier to reload without swabbing than 777.