I don't see 7 1/2 or 8 shot in the Kent loads (the size limit for our club.) Anyway, my old hammer gun with Damascus barrel is not nitro-proofed, so I need to load black powder, preferably in a cut-down AA hull.
My black-powder supply is ffg (fairly slow burning, I used it in a 0.577 rifle), so it may not perform that well in a shotgun, but at least it should keep the pressure down. I'm trying to determine the charge (mass) of ffg BP required for a low velocity, say 1150 fps, 12 gauge, 1 oz target load. My WAA12SL wads would likely need cutting down, too. I've not figured this out yet...
I have a manual, one-shell loader and a roll-crimper (from way back) that will turn-over-crimp an empty plastic AA hull.
Any solutions out there?
Thanks, and Cheers,
Roger