I use the black horn 209 in my encore, I disagree about the need to clean between shots, my bore is super tight, and if no other reason, I clean clean between shots, as when i hunt, I hunt out of a clean bore, so I like to shoot all shots as if i was hunting, I do however fire a 209 primer first before all shots to scrub the bore a little,
things I have noticed with BH209, its hotter than all pellets I have shot, a 100 grain of BH209, and 100 grains(2 pellets) of regular 777, or pryodex, my gun shoot 5 inches higher and a lot more recoil!, have not checked the speed difference, but seat of pants feeling is huge!
the nicest thing about the 209 to regular black powder is almost ZERO smoke cloud, I can shoot and see what I shot at like a regular rifle!
Dis likes, My gun is picky, and the BH209 produces the best groups, BUt if i shoot it in warm weather, say 60+ degrees, and then at 30 degrees it shoot differently, it will not same load, group in warm weather
I don't know why, it just won't!
I don't know how crossive it is, I clean after shooting it, but it doesn't stink like regular black powder thats for sure, my breech pluh cleans fast and easy, and never sticks.
I do recommend the stuff, just DO NOT SHOOT OVER 150 GRAINS, its not made to be shot at higher loads, NO 150 grain charges
and last, contact blackhorn before you use in your gun, many inline they recommend you do not use it it, plus they have tons of good reliable info on speeds and down range energy with many loads in many rifles lots of good help!