Argentine bottom metal has become pretty expensive and for a little more you can get custom.If you go with the 7x57, you might look for a 1909 Arg. tg/fp. If not altered, it would be the right length for the cartridge, it's hinged, has no locking screw holes and looks Mauser. You would still have to inlet the wood at little forward as it's longer than the FN metal. but the action screw hole spacing.