Never been on South Aamerica bird hunt or any similar high volume shooting hunt. However, some of my favorate 16 gauge ammos are from Spain or SA. These have well over 1300 fps muzzle velocity and pattern really well with small birdshot (6, 7, 7,5s). Great for fast moving birds and olympic-speed clays.

One does need a strong gun that will handle well over 12000 psi loads with absolutely no plastic deformation to metal parts -- hot Latino stuff!!

No personal information about 12 or 20 guage Latino shotshells, but, would expect similar ballistics, internal as well as external.

Niklas