I made 1018 Steel bedding blocks so Mauser barrelled actions could drop in and play musical chairs with bedded stocks.
The idea was 3 points of contact for rifling torque reaction; the two bottom sides of the recoil lug and the rear pillar
The idea for the rear recoil thrust was a steel face against the lower part of the recoil lug.
Mausers made over a span of 100 years keep getting worse.
The bottom of some Mauser recoil lugs look cast, and are too rough. They need to be flat. I can mill a flat spot on the bottom of the recoil lug.