Sorry to disagree...but, shooting broadheads and field points the same is NOT necessarily the best tune. What you have is an "average" for both. Group size determines the best tune. As pointed out many times on this board, broadheads are usually longer than field points. Even though they weigh the same (say 100 grains) the broadhead being longer changes the spine of the arrow. Now, if you have two arrows of different spine impacting the same you don't have the perfect tune for one or the other, you have an average. Choose which one you want to tune (field points or broadheads) and get the tightest group for that point.