Hardcore

All strings will stretch once installed on a bow. Prestretched or not.

Like I said though some stretch very little ( quality materials with quality craftsmanship) and some stretch quite a bit (for any number of reasonsex.quality materials with faulty loops etc etc).

I am just pointing out that any rest tied into your cablesisn't justset it and forget it. They need to be checked to make sure the bows tune isn't affecting the rests performance.