PM, a question for you. Do you think that back, say, in 1900 or 1910 all Paradox, Jungle Gun, Colindians were meant to shoot basically the same ammo - meanind, the same 1 3/4 oz conical made for 12 bore rifles, and differing only in powder loads? So that an owner could use factory ammo, and won't be limited to casting own bullets and rolling their own cartridges? And so the intended bullet's diameter for most guns of this kind should also be the same?
__
Btw. The records of the first public trials of Paradox quoted in Teasedale-Buckell's Experts on Guns and Shooting mention firing the gun with round ball, and reporting good accuracy. If I lay my hands on a Paradox some time, I guess a ball over 3 dram of BP would be the first load it will see.