BRS,, I have been looking for a 457191,, my 457122HP s.c. mold came to me 4-5 years ago ,,just held on to it ,it throws at .341+ to .352+ depending on my mix . For my 40-60 ( it is my favorite ,, you know ) I have 2 molds , throws 210-218 ,, depending on mix.
Don't pass on a 45-60 if you get the chance , it really surprised me " gentle giant ". I'm kind of proud of this one ,, made it look 100 yrs. old ( as discussed on forum's here by Ken H ).
coffee's ready ,, Hootmix.