How to Check For a Bent ArrowWhen Shooting Aluminum ArrowsWhen using aluminum arrows, it is important to know whether or not you have a bent arrow, as sometimes, this is not obvious to the naked eye. Many people use a table to roll the arrow across in order to determine if it is straight or bent. It is possible to roll them to check, however, we do not use this method.
Using a cordless drill is a quick, easy, and extremely efficient way, to check and see if they are bent. Using the insert end, lightly tighten down the drill chuck into it. 
Run the drill at 1/3 to no more than 1/2 speed, and look down the shaft while it is turning. If there are any wobbles, they will be seen. If there appears to be a slight wobble, loosen the drill chuck and turn the arrow about 1/8 of a turn and run again. If there is still a slight wobble, put the nock end into the drill and re-run it. Occasionally, nocks and inserts can have slight variations, which is why you want to test both ends, when necessary.
Since aluminum arrows can easily get bent after shooting them, it is a good idea to check them periodically. You will also want to check any used arrows you may buy. However, it may surprise you to learn, that sometimes even ones, straight from the factory, may not shoot well as others that are in the same box.
It seems that some just do not fly as good as others for whatever reason. Because of this, it is a good idea to always check your arrows, whether new or used, and make sure they fly well. The final test for straightness is to practice with them, one at a time, to see which one's fly best and then mark them accordingly. Some guys take a permanent marker and mark the fletchings of the good ones, so they do not get them mixed up. The ones that are not perfect can easily be used for shooting does, for target practice, or as a release arrow.
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