No, not out of the blue. That's the consensus of several web sites. It goes something like this: 4.3cc BP, overpowder wad, same of shot, overshot card. The issue is what happens between the powder and the shot.
There's sort of this hand waving about filling up metallic cartridges that goes along the lines of "if you're not all the way to the mouth of the shell, that's OK because the shells aren't crimped." But there's "not all the way" and "not even close to all the way".
I know that I don't want to use a shot cup or anything plastic. But I wonder if I should be adding some filler wads to raise the shot stack up some. There just isn't much discussion that I can find about that.
Well we don't rent pigs and I figure it's better to say it right out front because a man that does like to rent pigs is... he's hard to stop - Gus McCrae