I've a line on a 1900 Danzig made Mauser 1898 action. I've read that pre-1920 actions can be "soft", and as such, unsuitable for building into a sporter - per Frank DeHaas. Can someone confirm or offer comment?

That being said, I'd be looking at rebarreling to something like 7X57 - nothing "hot" or a wildcat.

Suggestions?