Atlasman I have to disagree with you. The duravanes I shoot just dont hold up. They are on Goldtips with a 6 degree helical. They ripple like crazy. My bow shoots 305 fps through the crono. I dont know if the speed has something to do with it. I switched to Bohnning vanes and the problem disappeared. It is a B2 bisquit and I did not move it between the different vane types.Bohnnings look new and Duravanes look like this.

The bow is tuned perfectly, shoots great through paper. The duravanes are just too soft in my opinion. I have seen some pictures of vanes going through a bisquit taken with a high speed camera. They ripple on the way through. Some less than others. None of them were hitting the ring that holds the bristles.