I know there' s marketing gimmicks out there but I don' t think they would put anyone at risk cause if they just shot them a couple of times and said well i guess 400fps is good enough without really ever testing it then they probably want be in business any more because they' ll be at the court house more than the factory. It' s just one of those things you' ll just have to wait and see. I believe I' ll give them a couple of years to see what other people say about them. I personally shoot a martin panther but my uncle is dealer and he got all the bow companies archery books in and I just happened to notice it. They' re making arrows for it that are 3 gpi. They claim they' re making everything out of military grade carbon ( i don' t know what types of carbon there is) even they' re shafts which have 5 layers of carbon so it must be tougher and lighter than the carbon they were using. Just have to wait and see and be open minded about it I guess because I think the technology is there to greatly improve the bows that are made this day and age.