Maggot, I won't be much help on the 32-20wcf, but I have a lot of old lyman reloading books. The biggest bullet they can use is the 115 gr.
Winchester--Groove Diameter Min-.311 Max-.3115 1 in 20 twist.
Stevens-------" " Min-.310 Max-.311 1 in 20 twist
Savage--------" " Min- .3105 Max 00 1 in 20 twist
I have loading information 80 gr Jacketed bullets, 100 gr and 115 and if you want it. The lyman books have information on cast bullets also. If you need any of this informatioin let me know. Carl L.