Rocky Mountain Cartridge manufactures lathe turned hulls in all gauges, google to contact. The hulls can be loaded with recipes found in reloading manuals and powder manufacture's data for straight walled hulls. Yes, that means 209 primers and 1-piece plastic wads or card and fiber wads. RMC hull are expensive as in $5 a copy, but can be reloaded over 3k times. I have these hulls in 4 different gauges and load them to exclusion of all others for hunting. Reloading requires simple hand tools. The old Lee Loader is perfect for the job or you can make the tools or RMC makes beautiful hand tools at a price. Shot containment is accomplished using 1 gauge oversized
over shot cards (OSC) and a little glue where the card meets the interior of the hull.
Brass hulls expand to chamber size and providing your chambers are the identical you will never have to resize the hulls. MY AyA 16 GA chambers were not standard and the hulls didn't fit. RMC mic'd the AyA's chambers and turned new hulls for no charge. Either mic your chambers or have a gun smith do so to ensure proper fit.
I can't explain why, but the patterns that I get from Brass hulls are outstanding. I have been loading all brass hulls hunting loads for over 8 years and couldn't be happier with the results.