Thanks for your comments, Bart. I did look at the burn rate chart, and may try some different powders when the panic buying dies down and they become available again. H322 looks interesting.
And your comments about the outcome of mounting a silencer and accuracy, I was thinking what you said, that the results might be better or worse. Well, the shooting club we belong to sells silencers, so tomorrow me and the better half will go punch some holes in paper and then discuss cans with the fine folks that run the place.
Enjoyed your input!