Too many variables for this to be taken as anything more than putting you in the ball park.... but no guarantees. You have different draw lengths and different sized critters. An 80 pound doe isn't going to fit in this baby the same as a 200 pound macho buck. If you really got to have something like this you'd be better off making your own. By the time you got through with it and testing...you'd be an expert at judging distances out to 30 yards.