My neighbor took some neat videos of me fiddling around with my 8-bore. The load was 285gr of Schuetzen FFg black powder under a 1200gr bullet. Sadly, accuracy was very poor... but I got some nice videos out of it, so still a win. Based on various other tests I'm convinced the powder load needs to be decreased and will try a lighter charge at a later date (going to focus on ball loads for a bit).

https://youtube.com/shorts/JJVfJXQ2tbE?feature=share
https://youtube.com/shorts/0ttDBUFm16w?feature=share

The keen eyed of you will notice I didn't do well with both these shots. I fired two more afterword to confirm poor accuracy of the load and not just the shooter.