At my home course, there are two longer par 3s that I just don't have the proper club for. I carry a 915F 18* and a 913H 24*, and for these two holes, the yardage is in between. I can't believe the shot consistency I get out of the 915F, so I'm very tempted to go for the 21* and pull the hybrid from the bag, but I'd like to have a sense about how much longer it might play (15 yards?)