They know that it can be done, but they also know it is pushing it. Some CB's could flat out not do it and some like yours could hold up. When they first sold my super max they advertised it on their site as 350 FPS and said in the fine print ti was the "target" arrows, the lites. Then before Cabelas and othersput it into print they changed it to 330 FPS and removed the target arrow comment because they know the CB will not last doing it. They now recommend not using any arrow under 430 grains including the point. and that is what they advertise the carbons at which I think is 431. The lites was Horton's answer to try and keep up with the speed game, they are now close enough with most of there competitors that they do not push or recommend the lites. Unless you have a older slower CB I would not use they.