Thanks for the info Straightarrow , Im putting it to use after reading Dr Ashby's paper , and anticipating an elk hunt this year . Last nite I started by geting a set of old acc's up to around 13.5 foc . I have been shooting around 10 - 11 for years .

Shooting that heavy of an arrow must realy quiet your bow down , the only drawback I can see is the noise the feathers make in comparison to vanes , when going for a light nock end of the arrow