Defective arrow can let you down in the key moment of a long hunt. It’s really important to test out all of your equipment, and arrows are no different. After going out and buying new arrows I like to number each arrow and shoot them from 20 yards to see if they all shoot the same. If a certain number is consistently off, then that arrow may have a slight defect.
Depending on who glues the tips in the ends of the arrows, or how the fletchings are put on, one arrow may shoot slightly different from the rest. If I do have one that shoots differently several times than any other arrows, I simply use that arrow as a practice arrow from then on. Consistency is key during crunch time!