Feeding problem 375 M94 XTR

[glockster157]

I am casting the RCBS 37-250-FN and the Lyman 375296 for a 1980 Winchester model 94 BB XTR in 375 Winchester. The problem I am having is that neither bullet is feeding into the chamber but the flat noses of the bullets hit right at the bottom of the chamber mouth. The mouth of the chamber is very square, one friend suggested that I throat it like a 1911, but I am not crazy about that idea. The other solution is to get the tray to raise the cartridge higher. Does anyone know about this or have a fix for this problem? I really want these bullets to work in this rifle.