SELECTING THE RIGHT EQUIPMENT
Most bowhunters these days are shooting mechanical releases that not only provide greater accuracy but also give the archer more leeway when selecting an arrow. Easton's arrow charts, or the ones provided by other manufactures, are good resources for selecting an arrow, but they are by no means accurate in every case. For example, most arrow charts only take into account the arrow length and the bow's draw weight, draw length and point weight. Some cams are more efficient than others and will transfer more energy to the arrow, changing the spine. The material and number of strands your bow's string and cables are made out of will also greatly affect the bow's performance, which is a direct correlation to the bow's affect on the spine of your arrow.

All of this sounds rather daunting, but it is not. There is a light at the end of the tunnel, especially for archers shooting a mechanical release. High-speed video has shown that when shooting a mechanical release, there is very little bend on the arrow (spine) when compared to a comparable setup shot with fingers. This gives the release shooter the advantage of shooting virtually any arrow. An arrow that is a couple of sizes under- or overspined should tune without a problem, but keep this in mind if you are having difficulty getting the bow to tune later on; you may eventually have to change arrows.