21 or 22 would be reasonalbe,, and accuracy past 10 or 12 would take lots of practice,,
please just get a stave that fits your draw,,
trying to make that work, recuces your chance of success ,, why do that...
at least 54 inches,, even a board 54 inches would give you a better chance of success,,
make the bow,, and give it to someone if you like,
dont break it trying to achieve an unreasonable draw,,
please not the cross bow stuff,, lots of antelope killed with reasonble length bow,,,,
I have a 54 inche bow that shoots out of a blind very nicely,, and can be drawn tp 27
even better make the bow and see how you can shoot it,, no one has a set draw ,,, you can vary if you practice,