The more weight up front, the better your FOC. (front of center)
http://www.ubbc.ca/resources/documen...plying_foc.pdf
The heavier the arrow, the better your kinetic energy and the less 'squirrely' the arrow will be. Accuracy does not improve... but you'll have slightly less 'drop'. (lighter arrow = faster. Faster arrow has less time for gravity to affect it before it gets to the target)
I prefer a fairly heavy arrow that's slow but pentrates well and won't drift off in the slightest breeze.
