Yeah, I thought they were pretty underspined myself but the staff at the local pro shop suggested going to them to get more speed. So what would be the consequences of an arrow that's underspined? I went to the local 3d shoot this past weekend and scored 289 out of 300 so the thing is dead on so they're not causing an issue with accuracy. I also don't have to worry about KE since my arrows penetrate further than any of the other archers I shoot with. I guess I just want to know what problems they could cause since I shot beman ICS 400's out of it for years and have just switched.