No, jim, I'm asking because...
I DON'T KNOW
ask me about auto pistol, and I'm pretty competent, except I avoid .45, esp 1911 like the plague, too much heart ache and drama, rather have a cute .32 from WWI nobody has heard of.
Shot gun, well, don't know why somebody would want a .410, too small, kinda like a 9mm flobert, falls in the HUH category.
So I posted
Check out the SAMMI specs, should give you the pressure of a .410
you probably could load a round down to the right range, and use a rifle powder so to maximize the longer barrel, also you could use a slug barrel on the shotgun.
I understand how chokes work, and I would assume that you WERE NOT using a choked barrel, an open or whatever, wouldn't think of trying this with a choked barrel
Next, .410 slugs I would assume have a constant bore diameter, question is
Is it possible to make it work, or will it ALL just blow up
so if I bought a mossy, or snakecharmer with a slug barrel, and I down loaded the .45 and I loaded with a soft cast bullet, would I still die???
AND
would it give an improved performance over a 3" slug??