RE: Any ways to make for a flatter shooting bow?
Pretty tough to do when you are about at your max for speed, which is what makes for flat shooting. To increase speed you can lighten your arrrows way up, but for a hunting setup you are sacrificing KE which is something that I would highly advise against. If you are shooting accurately with your current setup, I wouldn't be too concerned with the trajectory. Speed is what you need to change trajectory, and I think with your current bow you aren't going to be able to achieve what others can with the same stats.