Whenever I draw my bow back the peep sight rotates so that the string is smack dab in the middle. I have a string loop?????

get yourself a PRESTRETCHED STRING... there is a guy that is local to me that makes custom prestretched strings for 75$ he does all the work. and let me tell you i have never had my peep rotate or anything on my string for that matter! i would ask yoru local shop guy and see if he does teh same thing.

I build custom bow strings and if your peep is served in properly it will not rotate on you . I have not had one of my strings do it .