Ballistic Products has a short shells brochure that is one's for the asking. It lists several loads in 3/4 oz. and 7/8 oz. using International, Green Dot, Fiocchi hulls, various BP in stock components. I've shot them for the past 3 seasons successfully at woodcock and quail I have also loaded Cheddite paper hulls that I trim down. The Fiocchi cut down hull is a dam bioch to roll crimp. The Cheddies are a dream to roll crimp and I get at least 3 reloads out of them. There was a proof house dispute over what the short 12 should be proofed. My two guns were proofed for 7/8 oz. Some were done at 3/4 oz. and some at 1 1/8 oz. They were proofed in the white and some believe that once back to the gunmaker they were filed more on the outside to reduce weight. Skimin & Wood made guns in the white finished out by other makers. I have a Hellis and a Skimin & Wood finished out by a no-name maker. The Hellis's barrels were marked J.A., Joseph Asbury, one of the top barrel makers in his era.
One gunsmith I know has a 2" Dickson made by Dickson. It is a rarity. The walls are thin, but in proof, and it's his favorite game gun. Lagopus is a knowledgeable resource about the species. If anyone desires the BP brochure, pm your email address. It's a PDF so it has to be emailed rather than pm'd. The 2' chamber can't accept 2.5" loads They won't fit unfired. Gil