While Mauser actions are the basis for so many others, I think they've got two shortcommings.
One is their trigger. An aftermarket one will greatly improve that area.
The other is lock time. Way too long for precision shooting. It turns a centerfire rifle into a rimfire 22; you have to hold it still for 3 times as long as other modern actions. However, a titanium firing pin and extra strong spring, it will be much, much better.
Both mods is what some folks did with their single shot FN Mauser target actions. Once upgraded in these areas, they were as good as Win. 70's and much better than any Rem. 7XX action.
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master