Spiraling arrow

[Curmudgeon]

I have noticed that my arrows will often do a slow spiral with the tail moving in a counter clockwise motion, about one turn in 15 yards or so.  Any ideas what causes that?

[eric-thor]

http://bowmaker.net/tuning.htm
its best to just start with the basics it could be anything there are several other threads regarding arrow flight and form. start by working on tuning your setup if you have problems there your form is probably the culpret. goodluck bro.this link is a great asset.start there .