Mike,
Have a bud who had a pair of BSS 20's stocked to suite him that have been to S.A. at least ten times [perhaps twice that now] & there has never been the first hint of an issue w/either gun. Both have seen a LOT of use down there & neither has ever required anything aside from cleaning at the end of the day & relubricating. They are rock solid guns & I would not hesitate to take one down south. Shoot it here a bit first just to get accustomed toit. I'd say it is a fine choice.
kind regards, tw