Lightweight 32 special mold help

I just inherited my Grandfather’s Winchester model 92 in 32 special. It’s from 1953 so it’s not thay old.  I would like a 130-150 gn pb mold for low  velocity plinking. Curantly I have the RCBS 170gc mold. I have used with without the gc and used pistol powders for plinking.  Barrel slug at .323.  I have also use 32-40 pb bullets. Of course I also need a new sight nd was thinking oh getting a William’s FireSight.