FWIW - I just tried the 'feed' on two model 1898 Krags with some W-W factory rounds, (180 grain - RNSP). These rifles have been trouble free, in the past.

The OAL of the factory rounds was approximately 3.062".

My intention was to purposely cause 'Rim-Jams'. It was difficult!

Actually, I could only get the first round to remain in the 'Jammed' position. I could only do this with one of the Krags.

The other potentially interfering 'Rims' corrected themselves, when the magazine-gate was even gently closed.

With the first cartridge in the 'Rim Jam' position, even that could be corrected by a sharp slap on the bolt-handle.

The bevel on the rear of the case rim apparently serves its purpose!

IMHO - The brass rub marks and finish wear, on the inside of the side-plate, offer valuable clues on how a Krag is feeding cartridges.