Note Greener mentions using a 14 bore ball in the full choked 12. A 14 bore ball is as actual .693", but normally .690". A normal '12' with full choke used to be .690", same as the normal 40 points of choke in a .730" bore- thus, the ball fits the choke.

My buds used pure lead and WW .684" balls with very thin tee-shirt material for patching and said they were able to push the patched balls through the chokes when asked about this important feature.

With a 1,300fps smokeless load ('1 1/4oz. duck load'), howard put a WW 14 bore ball through both sides of a 45 gallon (IMP) fuel barrel. A factory 'Foster' slug merely made a lead splash and dent, with a tiny slit in the middle on the impact side. The 'boys' were impressed with round balls and subsequently both used them to advantage on moose after that.