Have tried using two different arrows for practice and hunting with mixed results. Beeman Thunderbolt and my own GT Lazer II weigh about the same, fletched with the same vanes, aluminum nocks (albeit the GT has a threaded hile in it) yet fly to slightly different point of impact. Both brands fly consistently the same. Hmmm? Difference in spine make to blame?
As for broadheads, Slick Tricks std or mags for fixed, NAP Spitfires seem to fly best fro me. So much like field tips that I no longer practice with same, just check zero with 'heads when hunting starts.