I shoot a 62 smoothbore, I made a mandrel that measures .595" I use heavy typing paper cut to wrap twice around the mandrel. Gluestick to close and at one end I put one card wad, the over powder type. Fold over the ends and glue shut.
Add shot I generally use 1 1/2 oz. # 4 or 6 shot. One more wad over the shot and fold the ends over and glue.
Here's the trick though, I use oatmeal as a buffer between powder and shot cup.
Absolute murder on squirrels.
This year I want to try dipping the tubes in beeswax and crisco to see if it will keep the fouling soft andallow a faster reload.
If I understand correctly:
You use the oatmeal as a firewall?
You drop the entire shot container into the bore as a sealed unit...but it opens reliably and gives consistent patterns?
What holds the shot container in place if an over shot card is not used up ahead of the shot container...why doesn't it slide out?
Thanks