I just got an 1894 Winchester with button magazine. I was trying different loads in it and came upon a sizing issue. I had some HSM factory ammo, which the bullet was way undersized, and some handloads. The handloads used HV brass from Huntingtons and .323 sized boolits I cast myself. I broke down the HSM factory and loaded with 17gr of RL7 and my cast boolit. At the range today I could not chamber any of these cartridges. They almost made it in but not quite. The HV brass rounds chambered and fired fine. When I got home I made measurements of all three and the HSM factory chambered fine as well as the HV brass handloads. The HSM loads that wouldn't chamber had dimensions the same or a little less as the other two except just below the crimp. FC die used. It was .342" at that point and the other two were .339+/- I did use a micrometer. Now that I know the discrepancy I'm at a loss to figure out how to remedy it without taking it apart. I'd rather not have to take the time and then resize and lose the primer in the process if there is a way to avoid it. Any ideas? If not I will break it down. Thanks