I hunted them in Argentina in 2014, combined with a wingshooting hunt for dove. Great trip, great hunt, and ended up shooting an old bull in an open, very muddy grassland, after a day of torrential rain. Outfitter was South American Adventure Safaris, a real first-class outfit- accommodations, food, and hunting were superb. These are very large bovines, larger than the African buffalo, and this one soaked up three rounds of .375 Ruger and 270 gr. Barnes TSX before expiring.