I think you're right, Sarg - the weight is high, and the twist slow, indicating heavy charges and light, short bullets or round ball.
: I wasn't aware 12 bores shot over 7 drams. Is there no load data on the table or barrels?
; The 14 pound + weight surely indicates very heavy powder loading, that's for sure. The twist indicates short bullets or ball.
: Very nice re-finish. The 'fences show nicely and are 'special' I believe.