the rule of thumb for almost EVERY bow out there is the arrow must weigh atleast 5 grains per pound of draw weight.


example...your draw weight is 70lbs. your arrow must then weigh 350 or more grains to be covered under the manufacturers warranty. the arrow weight is finished arrows...including shaft, fletching, insert, nock and tip. if its too low, it can be very dangerous...usually blowing up the bow. ive seen pics of bows in about 100 pieces....

theres verrrrrrry few bows that number is different.

if your talking arrow spine, every arrow manufacturer uses different numbers for spine. you have to look at their charts....too weak of spine, and you can blow up the arrow, and possibly bow.