Another " trade off" on higher letoff bows, is the greater difficulty in maintaining proper back tension, when using them. When going to a sharp letoff, it can be a natural tendency to reduce back tension and allow the string to creep forward. Not only does this cause some eradict shooting, but it can put some pretty good stress on the shoulder when the newer, harder cams grab hold. Also, the reduction in back tension can lead to " punching" the trigger if you use a release.