Just a FYI. While i like the Lg Ring Mauser for projects. When you weigh the aftermarket support for the Mauser vs a 700 action.
In the long run it might be advantageous to start from scratch with a 700 receiver. They run $360ish from Buds Guns, aftermarket (rifle stocks) $200, barrel $300. Unless you go with a detachable mag build, i have a complete 700 bottom metal set up sitting here.