Bartman, that actually happened to a friend of mine at the Pa. IBO state shoot. He used to shoot both IBO and ASA and had 2 pair of swaroskis, 8 and 10X42. Got down there and had the wrong pair!! Ended up using a pair of $19 Wal-Mart specials that day!! Maybe they were the 7X 50 somethings? anyway, he was screwed for that day!