I would not worry much about the Mauser 98’s. Now the Spanish Mauser 95’s are another issue. Some were converted to a homegrown round dimensionally identical to the 7.62x51. With only two locking lugs and the inferior Spanish steel, there is a very serious problem.
I thought it was '93's. The 1916's that were converted to 7.62 CETME(from 7x57), post Civil War. I've shot 7.62 Nato in mine. Difficilt to lift the bolt, and it hits high. Reloaded for it with 110 grain light loads, but haven't fired it.