I have been reloading the 32-20 for a revolver since the mid-1960's. The length of brass varies all over the map. Trim ALL you have to the length of the shortest one and adjust the dies for that length. Also, adjust the dies to turn the flare just back straight when seating the bullet (not crimped) and get a Lee Factory Crimp die to crimp it. If you have more than one 32-20, the chambers will probably vary, particularly in the location of the transition. That means you will probably have problems shooting cases from one in the another. In that case, shorten the sizing die slightly, until the resized case fits in all of your 32-20's. It doesn't take much. Check the diameter of the barrel and chamber throat. Size the bullets accordingly. Doing these things will GREATLY reduce any problems you have with reloading the 32-20.
0.314" is necessary for pre-WWII guns. Most newer ones will take 0.312". Of course, the Thompson Contender is 0.308". I got rid of it for that reason. Almost any bullet will work. I like the RCBS 32-098. However, I have used the 311 008, 311 316, a similar Modern-Bond mold, and a few others I don't remember right now. I have used several powders. Bullseye, Red Dot, and Unique work well, but could be double (or triple) charged with them. I now use Trail Boss for light loads for my old revolvers and the last of my supply of SR 4756 for higher loads. For my Marlin rifle, I use 2400. I use different bullets for each powder so even if they get separated from their marked boxes, I will know what is in them. Anything that cannot be identified is shot in the Marlin.
My favorite gun in 32-20 is a S&W NewModel 16 that I had rechambered from .32 Magnum. Have fun.