12-gauge BP shotgun

by Slow Hand , Indiana, Wednesday, May 07, 2025, 09:27 (4 days ago) @ AaronB

I used to have a really informal site saved back when I was loading BP shot shells for CAS. I can’t find it at present.

Bird the main think I remember is you generally use equal volumes of shot and powder. And a quick search finds there is basically 27 gr in a dram. So look at most modern shot shell boxes and they still give a dram equivalent load.

You’ll want fiber cushion wads between powder and shot and you’ll need a card wad over your shot. Circle Fly used to be the go to for wads but I’m sure there are plenty of sources these days. Ballistic Priduxts Inc has a lot of shotgun loading stuff.

Is it a single or a double? Doubles take a bit more care in loading as you want to make sure all the stuff on the second barrel stays out when recooking from the first barrel!

You might look in the back of a Sixie Gunwoms cat along as well, they had plenty of good reference data in them.

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