How to determine what draw length your bow is set to.
When you purchase a bow the draw length on the bow is measured to AMO Standard.
This standard is
With bow drawn. From inside of the nock groove to the pivot point of the bow, then add 1.75"
The pivot point is the deepest part of the grip (NOT always the rest mounting hole)
So for a 28" draw the bow will measure from the inside of the nock groove to the pivot point 26.25". Add 1.75" to get 28"