I shoot some more the other day. 3 different arrows. All 28.25" All indoor 20 Yards
#1 CX 4560 terminator select 430gr 100gr tip
#2 Cabela' s camo stalker 465gr 125gr tip
#3 XX78 2512' s 522gr 125gr tip

The Cabela' s flew like rockets right off, no adjustments needed.Same POI as the fletched 2512' s I usually shoot.

I used the 4560' s purposely because they were underspined for my Mighty Mite @#64. They flew very well, just slightly left of center (1/2" ) but grouped very tightly. Nick eluded to spine being less of an issue because of the gyroscopic effect. I' m pretty much retarded with that stuff so all I' ll say is on my rig the underspined arrows flew and grouped well with the Turbos....and they didn' t without.

The 2512' s were another story. Can you say porpoise?? All over the road. I shot 4 and quit cause they were scaring me. Whether it was the weight or shaft diameter I don' t know, but they flew like poo and I' ll stick with my 5" hellical on these.

The only thing I chrony' d was the CX4560. Point blank.288 with fletch and 277 with the Turbo. Not the increase like I thought, but the arrow is 3/4" long for my rig now. I think after I trim them I' ll be even or slightly quicker.
RackAttack, that' s how they can be quicker. Figure your arrow,-fletch,-3/4" shaft weight,+55 grains for the Hunter' s. If you shoot mechanicals, the deadX should work and they' re lighter yet. Common sense tells me they' ll retain their speed better downrange just due to design and less air resistance.


BobCo.
Luckily I had to make no adjustments to my bow. I stripped fletch, attached the
Turbos and " X" . They are louder inside, I could hear them now, but no louder than my feathers....just different sound. Outside, all I heard was impact and I hid behind a tree 3 yards behind the target while a buddy shot.

I' ll do detailed chrony when I get time again.

Next step, trim arrows and chrony from 0-15yards....and then to broadheads.