Neither my camera nor my skills are up to task of clearly showing what he did, but here goes.

[Linked Image]

The photos make it look like the top surface of the rail is uneven, but they exaggerate.
[Linked Image]

On the photo below I have tried to show the area of the rail that was missing before he welded it up. The green sharpy shows where the gap between the rails was too wide.

[Linked Image]

Prior to Jim's work, the gun just would not feed. Cases came out too early and ended up pointing all sorts of wrong places. Some jammed on the left side of the barrel face, others on the right. The problem was most dramatic on the cartridges on the left side of the action. It just was not acceptable at all. Now it is feeding flawlessly--the way a Mauser is supposed to.

I was thinking my only option was to go with a bigger diameter case, maybe move up to 9.3x64 to salvage the barrel, but that would require re-chambering, changing the bolt face, and getting a different mag box.