The bow is shooting a 405 grain arrow at 276 right now so I don't feel the bow could only be 62-63 pounds
My bow set on 60lb 28" draw 400gr arrow is doing 280 so chances are it could be right.
I have seen the hanging shop scales be way off the mark specially if it is an older scale that has had a lot of use the spring looses some of the tension and will give a false higher reading.
The best thing to do is get a digital bow scale that is if you have about 700 smackers to spare
