Pat, i have no idea if this will help, but it's information nonetheless. About three years ago i wanted to make a lemonwood bow but had no luck sourcing it. So, i bought a York lemonwood bow off craigslist and backed it with boo. The York stamping said FB 56 38. Which in their vernacular meant the bow is backed with fiber (which i removed) and is 5’ 6” long pulling 38#. I glued the boo with TBIII with no reflex. The boo was a tapered piece from Echo. That bow was pulling every bit of 90lbs after glue up. I scraped carefully for hours and got it down to about 60#. It had some set as all of the old York bows did and it came out kind of whip ended, but it's pretty fast. However it'll knock your fillings out with hand shock. It's the first bow on the right. My nephew shot it for two years and it held up to his 19 year old attempts to shoot it as fast as he could until he cherry picked a faster red oak backed hickory bow off my rack. I make the cherry pickers trade in so i still have it.
I doubt you'll have a problem hitting your target weight.