My question is, if you take a set of limbs made for a 64" bow that was 60# at 28" and put them on a shorter riser and made it a 62" bow what would the draw weight be?
That is only 2" shorter; new bow will be 61#@28 (using the old Bear TD formula)
Bjorn: All of my Bear limbs show a 2# or sometimes 3# difference between riser lengths. Those risers are 4 inches different from A to B to C though, not 2, so your number is probably correct. However, when I had several Bighorn T/D recurves with different length risers, I also found about a 2# difference when going up or down two inches in riser length. For what it's worth. Regardless, it's not a big difference.