OK, lets talk speed lose in bows. I know that some speed is lost do to how much poundage the bow is set at. How much speed is lost shooting 60#compared to 70#? Does this increase as the poundage drops, say shooting 50# compared to 60#? In other words would you loose more speed between 50 to 60# or between 60 to 70#? What over all speed would you loose shooting 50# compared to 70#? Of course this would be done using the same grain arrow. Do these figures work the same with all bows or more so with speed bows? What say you?