This is my first post on CastBoolits , so please guide me if I have posted in the wrong place.
I have a New Old Stock Model 53 manufactured in 1990. I have re entered the Reloading hobby and seem to have forgotten past lessons received on bullet diameters. Bullet weight of between 100 and 115 but when I shop online I am running into diameter choices (.313 .314 etc..).. I have shot Winchester and Black Hills factory loads in the past but have no idea the diameter. Can someone tell me what diameter to purchase or how I find out proper diameter. I shoot only RNFP for Cowboy Action.