Bigpapascout,
Yes the Phantoms are big, which is why I would like to use them. I had them shooting awesome out of my last years rig (02 mighty-mite) with the same arrows.
I cut 1/2" off the arrows to accommodate my 1/2" reduction in draw length- might had been a bad move.
My arrows are helical fletched with an Arizona e-z fletched & 4" duravanes. The phantoms are spinning true on the arrows I try them on, they just won't pattern. I did get one to hit bull at 30 by using it on a 340 that was fletched with blazers (it's in my quiver). I thought that was my answer (and still maybe) but I refletched another arrow with blazers and the shotgun pattern reappeared. I had just refletched all of my 18-340's with new duravanes so I wasn't to ready to strip them all in hopes the blazers were my answer.

Once season winds down and these boards get slow again I 'll revisit what's going on. Maybe going back to a fixed rest is my answer (arrow needing more guidance?)
As for now it's stingers and slick tricks for me.
The slick tricks have the same size cut as the phantoms, so who knows- once I draw blood with them I may prefer them anyways .

Thanks for the help.