l know of 2 300's in the same game, but on a 2 pairs of lanes side by side, not against the 1 team.
The best l have seen is a 4 man team, 3 gaem league, where 1 team manged at least 1 bowler over 280 each game.
Game 1 had a 280
Game 2 had a 289
Game 3 had a 280
Lets just say the opposition was not to impressed, when those 3 differant bowlers alsom manged each manged over 750 for the 3 games of the night.