FWIW
I'm shootin 29" CE 150's with 150gr head, brass inserts in my PSR which is 57# @ 28"

When using the calculator it is important to add the thickness of your strike plate back into you side cut figure. For you at -3/16" on the Widow add back 1/16" for your calf hair strike plate for -1/8". It'll make a big difference.
Grabwad your PSR is cut to 1/8" past center which is different from a PSAX which 3/16" past center.