I was fortunate recently in purchasing some Gewehr mauser receivers. I bought two barreled receivers and the seller offered to sell me five more bare receivers for a total of $450. There are two large ring standard action, one large ring "intermediate" action (aka short action), and four small ring actions.
One large ring barreled action is a DWM model 1908 (G98). That action is going to my best friend. The other large ring barreled action is a Turkish T.C. M1938 Kale (G98) that has a small ring barrel on it. The intermediate action is a Turkish 1903 (G98) that was apparently converted to 7.92x57 in or about 1938 hence the cut out at the top of the receiver that allows for a stripper clip. There was no bolt with it so I'll order one soon since it's nearly a full 1/4" shorter than a standard G98. It too was threaded for a small ring barrel.
This is the short action large ring Turkish 1903 (right) compared to the standard small ring (left) mauser. Notice the strength difference ?
The small ring receivers are as follows: Modelo 1893 Argentine (7.65x53), an unknown Spanish mauser, a Mexican 1941 Fabrica Nacional De Armas, and an unknown mauser.
My buddy is considering a 400 Whelen for his DWM action and I am building a 375 Whelen AI on my Turkish 1938 action. I will most likely be sending the Turkish 1903 to be cold/laser welded to repair the conversion. Several will be sent to have the bolts replaced with a longer Obendorf extended handle for scope use. Anything questionable in strength will be sent to Pac-Noir for testing before installing a barrel. I may not keep the small ring actions as I have enough on my hands lol.