archery bow ratings
archery bow ratings
Why is the IBO Archery PSE list two different speeds for the same arc?
In the catalog of PSE archery why is IBO two different indices to speed on the same arc, which is correct? They do it with all arcs from there. But is specifications for the IBO 350-grain arrow at 70 LB draw weight and 30 "draw length? If these are the specs on how the IBO can be different speeds for the same arc?
No two identical and arrows and PSE cover this imperfection giving approximate speed an arrow pointing high. 
Although complete drainage, if you're not quite in the fire wall and the next This may explain + / - 2.3 fps
