There is a controversy right in Fire Forums. My view that they are simply not the quality of other alternatives, as questions about proper receiver heat treating. Existing FN mauser sporting actions, probably requiring 'harvest' from some existing rifle. Otherwise the Zastava mauser action close copy as really quite decent. They may yet be available. The note your photos not viewable, but familiar with the product!
The 6.5 Swede a great cartridge. Nowadays I don't know whether ammo is problematic if you don't handload.
My suggestion that if you're not set on the latter genre of mauser pattern sporting actions, many other good choices such as Sako, for instance. IF set on commercial FN, likely such as Husqvarna Model 640 genre or even an early fifties Sears/Wards FN actioned rifle donor.
Good luck'!
John
