this is why i like muzzy or other easily replacible blade system...
i will give each shaft its own broadhead...i will shot it and make sure it flies true...i keep a pile of "practice blades"(good blades but ones that been in the quiver all season or whatever..i buy fresh blades yearly)
this way there is NO question that any arrow i grab is flying where it aughta fly...
ive had trouble with my muzzys the last 2 seasons...i dont know what it is but certain shafts will not shoot certain heads...i head to work through the combos..but finally got a bunch to shoot right...had 1 or 2 out of a dozen just refuse to shoot...could be the arrows or inserts or ferrule on the head etc...
flight difference usually wasnt GREAT..but im picky about that...