The way to prove your powders is a chronograph I think, but really high chrono results with lots of garbage left in the bore would be an important negative for me.
For my own needs both a chronograph and a first patch from the cleaning rod tells me all I need to know.
Now, if someone has more comprehensive information on types of wood and processes I'd like to see it, I only spent 10 minutes looking and I'm sure there must be lots more info on it, but but just saying "Mine's great BP" without proof is what's called anecdotal information. Not that it's subject automatically to doubt, but it's also not subject to acceptance without proof.
parts