Hi guys. A friend is opening up an archery shop and had a longbow brought in the was bought at a yard sale. He thinks it is only a 25# as it has 25 on the handle. Overall length (measuring along the belly of the bow) is 60 5/8" . I did a search and found a post saying rule of thumb was a recurve is 4" shorter then the measured length and a longbow is 4" shorter. Does this sound right as a starting point to make it 57" ? I know things can vary. Thanks.