It's is actually the German ones (DWM). They are so wonderfully fitted and machined, but the case is thin on some. The underlying steel is tough (Just try cutting off a bolt handle with a hacksaw, and you will certainly see "tough!"), but it tends to be a bit soft. Reheat treating the action after machine work is completed can reassure the owner that the gun is much less likely to suffer setback (and increased headspace). The Argentine is as good for a magnum cartridge as any Mauser, but the caution still applies.