No lead restrictions here in Texas as far as turkey goes. Steel shot was all that was available, at least shot that was large enough, at the time. Even though it is labeled as steel it's more like mild steel or iron. With some difficulty I can flatten the shot a bit with pliers so I was hoping it would be soft enough for my smoothie. I understand the plastic intolerance to black powder all too well as early on in my muzzle loading years I tried to hot rod plastic skirted projectiles out of my GPR and spent numerous hours chiseling the tar-like fouling out of the bore. I've got over powder wads, shot cards and such but no shot cups. I'm also planning on shooting round ball out of my trade gun to see if I can develop an accurate load, both with modern patching material as well as natural, like grass, paper wasp nest, etc. I didn't want to waste the shot I already had but maybe it's not worth it in the long run.
So for 30 yards or less out of a non choked twenty gauge, what size lead shot is effective?
I've read and been told everything from #4 shot through T BB is needed?