With a stiff-handled bow, bending stresses, when they arrive at limb-to-handle juncture, need to be absorbed gradually by handle area. Otherwise there's likelihood that glue joint between limb and riser will fail and handle pop off.
Keyword is "gradually".
Imo, ramps shaped into ends of handle need to slope much more gradually down into limb. Looking at lots of bows posted here on PA will illustrate.
I made same mistake on first bows.
Good luck!