I don't know if you meant RHP games but on Tim Krabbé's Chess Records-page, http://www.xs4all.nl/~timkr/records/records.htm there is this "Latest first capture", a game where 71 moves are played with no captures and then a draw claimed by the 50-move rule. I didn't play through the game so I don't know whether it is a sensible game or the players deliberately played without capturing. Anyway, Krabbé claims that these records are from 'serious and verifiable tournament games'..