RE: Detuning
Frank, again, if you tune toward the specific goal of making your field points and broadheads strike the same POI, it can be done.
I'm saying the bow can be tuned to shoot broadheads even better when you tune specifically for them. It will also shoot field points even better if you tune specifically for them.
And, yes, it's absolutely possible that, through some strange quirk of fate or maybe Divine Intervention, you could wind up with a bow/arrow/broadhead/tune combination that will shoot both field points and broadheads perfectly and to the same POI.
But then, again, is the guy who's doing the tuning skilled enough to see the differences? Is he shooting to distances where variations in POI can be readily seen? For instance, the 'inch or two' you see at 40 yards would becloser to threeinches at 60 yards, or 4" at 80 yards. Add those extra inches to your normal group sizes at those distances and you get an idea of what can happen.
Shooting field archery, those 4" at 80 yards would easily put you out of the spot and into the 4 ring. So... Yes, I suppose Iam talking about a greaterlevel of accuracy and consistency- at longer distances -than most people who've come up in the 3D sport have ever demanded of their equipment.
I freely admit that probablynone of thismeans a flippin' thing to 99% of the guys who cruise this forum, and they're happy as clams at getting their broadheads and field points to strike same POIover the distances they commonly shoot. And I can see why they would call it a perfect tune.But allowing that to go unchallenged would bea disservice to that other 1%, who would want or need to know they can tune for specific purposes and get better results.