The La Coruña Mauser is the Spanish Model 1943; it is a Model 98 Mauser action and if not altered would be in 7.92 (8mm Mauser). It is more than adequately strong for any reasonable load in that caliber or for conversion to a caliber like .308 Winchester. It has been partly "sporterized" and the rear sight might have been removed with the intent of mounting a scope. You can do that, or any competent gunsmith can install a barrel open sight or a receiver peep sight.
The Carcano was also apparently partly sporterized. Its original caliber would have been 6.5 x 52. Firing it except as a single shot will require 6-round en-bloc clips that fit into the magazine. They are available at gun shows and from parts suppliers.
Both rifles should have military accuracy, with the Carcano possibly a bit more accurate than the Mauser.
Jim
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