I hear the Boar in Argentina are very large and very tough. I have hear do the True 500 pound boars there. My largest boar was a true 200 lb plus bore. A jacketed 8mm Mauser SP was good, but did not pass all the way through after hitting bone and then the Tough Armour at the neck and shoulders.
My son killed a 150 lb Russian boar with his .223 single shot. One of the neck shots only barely penetrated the Armour.
My next boar will likely be my .50 caliber cape with the 16 ga barrel loaded with the "Daryl" ball recipe.

Martin:
Great luck and great hunting wishes to the cazadore. I hope to be going on a similar hunt in Argentina within the year. Tell me how it goes.