So I must be doing something wrong ; which is no real surprise but two different slugs and 2 different readings done the same way and with the same lead and measurements taken with the same micrometer and caliper.
So what’s your best tried and true method for slugging a Winchester 1894 bore?
Kind of doing this backwards cause I’ve had the rifle for a few years and have shot it lots and even taken game with it and it’s a great shooter but somewhere along the line a problem developed chambering rounds. So I’m starting back at the beginning and thinking my 311 pcd boolits may suddenly be the culprit.