Just reading my Hoyt GM recurve manual it says " The weight on most Hoyt bows is adjustable in a range of approximately 10%"
I have increased 36 lb limbs to a measured 39 and a bit using bow scales.
And Hoyt GM (and indeed all Hoyt recurve manuals - being the same one) available from here
http://www.hoyt.com/technical/bowmanuals.tpl
lists manuals from 2006-2002, although I have a 2001 manual and it seems to be identical to the next years.
Hope this helps