Hello-

I too have at times wondered just where I should post questions about the use and care of my black powder pinfire cartridge 16bore double rifles.

The way I tend to shake it down is like this...
If I'm fiddling with things in order to get one of the SxS bore rifles to shoot right, in respect to regulation that is, I post the questions, issues, or comments on the double rifle list.
If I'm in some kind of spot as to what to do with overall cartridge performance or something to the sort of ballistics, I post to the big bore rifles list.
If there's some hoodoo voodoo vixen devil hex regarding black powder, it's ignition, or it's care in respect to loading with it, I post to the blackpowder and muzzleloaders list.

Or something like that...

--Tinker