I have a buddy that shoots falling plates with a Webley .455 loaded with full black. His lube is made from horse tallow and bee's wax. He calls it Pegasus lube. The other shooters are simply dazed.
I loved shooting cowboy with full black loads. The scorer and by standers would choke and cough. Some times the smoke would hang and you'd have to wait to see a target. Shoulda heard the whinin' and bitchin'. I always figured it was a bit closer to historically accurate. The go fast poot and tink guys and my wife and I did not see eye to eye and we eventually gave up.
One shoot we attended had a solve the stage however you wish scenario. Lots of targets, lots. I used 5 rounds of .38 S&W by loading 4, laying the top break pocket Smith broke open on the poker table. At the beep, I loaded the 5th round and took the 5 swingers double action. Drew my Richards/Mason .44 Colt conversions duelist style and shot the next 10. Next I shot 10 with a 66 carbine replica in .44 spl but using my .44 Colt ammo. Lastly I used 32 rounds of 12gauge with my extra ammo carried in a lard bucket. I had soaked my felt wads in melted lard and shot 2 1/2" cut down, roll crimped paper hulls. The oil was cooking out of the forearm when I finished. You bet I was wearing a cow hide leather glove on my off hand. I shot some of the shotgun targets twice just for the hell of it. Chaos, smoke, confusion, mayhem, looked like a trash fire in a land fill. Yee haw, all full black powder. Of course Sue and I were camped in a wall tent and spent two hours cleaning guns and brass while our neighbors changed into shorts and flip flops and sipped G&T's in front of their 200 thousand dollar motor homes.