There is a huge fuzzy area regarding names of calibres in muzzleloading rifles and smoothbores as compared to ctg. shooting rifles. Normally ML's are called by the bore size, while rifles are named for the groove diameter. The Brits and Europeans & sometimes Americans like to do it both ways and that fuzzies things up.(both ways

)

Many guns are named by the case or hull they use - paper or brass, therefore a 16 bore brass cased rifle can or may have, if deeply grooved, a tight 13 bore groove diameter and actually shoot a .700" to .705" ball or bullet, as mine does.

The conical mould mentioned produces a bullet that at major diameter, is actually between 15 bore and 14 bore, not 16 bore. 15 bore is .677" and 14 bore is .693".

Casper, are you sure the base isn't .653", not .635"? That sounds small, really small. The .685" "band" sounds way too large for a conical to have a .635" bottom band - that would make the bullet look almost like a boattail, but easier to start in a say 14 1/2 bore muzzleloading rifle, however blowby might be a problem.

Does it have 2 bands of .685" like a paradox bullet and perhaps just a short angled rebated base for that small measurement, like on a modern pistol bullet mould?