I have a pretty good idea already how I am going to rectify this. Mostly wondering out loud. Lots of old guns out there with all kinds of unseen repairs to keep them going. Thanks all for the replies.

One last comment. It appears the primary recoil surface is actually the rear mag box based on the increased surface area involved and the tight bedding. That little square recoil lug looks more like a secondary surface to me. If you look at a properly bedded Mauser the rear of the mag box is bedded hard against the wood adding to the surface area to absorb recoil. If the small square lug was bedded hard it looks like a stock splitter, not enough surface area to do much good. Also all the force is directed to a small area with the least amount ot support. Mauser is relieved in the middle to spread forces laterally and down the side rails. I’ll get pictures posted of before and after hopefully in the next couple or weeks. Thank you all for your input.