Yeah, it was harder to find powder and primers for a while, but not too bad now. Primers are more expensive than before, but such is life. Scheutzen BP is readily available. I just bought a bunch of 1Fg for more flame in shotgun.

Like Dave T said, CAS is generally slowing down a bit. There are other forums on CasCity that are pretty slow as well. I think the majority of people shooting BP categories in CAS now are using APP. It is too easy, so they don't need to be posting and asking about lubes, how much and what sort of lube, big lube bullets, type of powder, etc. Overall, I think BP-sub shooters are somewhat less enthusiastic about BP in general. A lot of them were smokeless shooters who found less competition in BP categories so they use APP. Don't get me wrong, APP is okay and I use it sometimes for rifle. It smokes plenty, sometimes more than BP, and leaves less fouling. But I do miss the flame with APP.
For the last few years I've been staying with my elderly mom, 90 miles from my house and reloading gear, and don't have as much time for loading or cleaning guns. So I've been lazy and shooting more smokeless than BP. But I bought a bunch of lubed .38's from Springfield Slim before he retires from selling bullets, plus more from Missouri bullet company, and plan on shooting more BP this year. The Texican Rangers hold a year-long competition for category honors, you have to shoot a category in at least 5 matches during the year to qualify. So this year I'm going to shoot frontier cartridge monthly at that club.
This was two weeks ago at the Texas Riviera Pistoleros 2nd annual Gunfight at Gamble Gulch. APP in rifle, BP in .38 conversions and 12Ga otherwise. A nice breeze to allow seeing the targets. That's fine at a "big" match, but at a monthly I prefer little to no wind so the smoke hangs around and bugs the posse.