Solved my own issue. It was what I thought. The original OAL was too short. So I determined the max cartridge length for my rifle and seated a bullet to .050" less. First check and it chambered nicely. However when put into the tube it was too long and the tip was hanging up in the mag tube and the feed ramp couldn't elevate it. I shortened the OAL another .010" and presto. A smooth feed. No hang ups what so ever. The difference between the cast bullets and the Winchester jacketed bullet is the profile. The cast ones have a larger flat point and a shorter olgive which cause the tip to jam below the entrance to the chamber. Lengthening the OAL allowed the flatter tip to be in line with the chamber for a smooth feed. I wonder how many guys got rid of their 375s for feed issues like this.
Last edited by bronko22000; 12-10-2021 at 06:04 PM.