Mine both have a much smaller bore, the grooves on mine are just about 0.500". This makes them 50 caliber stepchildren as none of the standard 50 cal stuff works. Even finding a patch for a 0.490" ball is a challenge. Not having a 209 primer precludes the use of Blackhorn 209, it will not setoff BH 209.
I also have the Gonic mold, made by LEE for a 465 grain bullet. I did try it with Pyrodex, accurate enough.
I stocked up on sabots, so if I decide to shot BP again, I'll be set.