True 5:1 concentration. 1  Double the strength of other brands. 2  Minimal or no fillers and binders. 3  No pharmaceuticals, sugar, or dyes. 4  Comprehensive lab testing (e.g., heavy metals,etc.) 5  Made in a cGMP certified facility. 6  Unbeatable value. 7  Safely used in the USA since 1995.
Arrow Length - refers to the length of the arrow shaft. Arrow size - refers to the spine (stiffness) of the arrow. The shaft size is always referring to the diameter of the shaft, the wall thickness of the shaft and the distance that the arrow shaft will flex before it bends or breaks.
Since the speed of a bow depends on many different factors (draw length, draw weight, arrow weight are the most important), it made sense to develop a set of common testing conditions. As such, all IBO tests are performed with:1  A 70 lbs.2  draw weight version of the bow.You also have the average draw length of 28â³, and decide to use 425 grain arrows for an optimal speed-to-kinetic energy ratio. You also install some accessories onto your bow string.raw Length Impact On Speed. For every 1â³ of reduction in draw length, you can expect to lose around 10 FPS of arrow speed. IBO speed tests are conducted using 30â³ draw length, however most people have a draw length of around 28â³. This is already a 20 FPS reduction compared to the IBO speed rating.