usealy the pivot point where the rest prongs balence the front of the arrow are 1 3/4 inches shorter than actual draw , as an example I shoot a 28inch draw bow , useing 27 inch arrows and they still have 3/4 inch clearance to the rest , so if your bow is truely a 27 inch draw { they seldom are on the money } you would have 1 3/4 inches to spare .