I haven't shot it in a few years, n want to.
Want to make sure Im ok.
I just used a low pressure 20g 1oz load of unique (about 7000psi), cut the petals off a 20g wad, added some felt wads, put it & the ball in a Remington yellow case with the crimp cut off, n put some crisco ontop .The Remingtons seemed to fit the ball nice, didn't even have to crimp it,as it was a snug, not tight fit.
I tried Winchester AA cases, ball wouldn't fit with out way to much force.
I was thinking my margin of error was that a 20bore slug is a good bit less than an ounce.
Am I mental?...these bbls are wicked thick, 1/8th+ at the muzzle
Franc