Redhawk is blaming the lighted nocks. Are you using the good ones (lumenock) or the cheap ones? The lumenocks are a few grains heavier, but not enough to throw your whole setup out of whack unless you are on the ragged edge to start with.
When I was using the G5's, I was not using lighted nocks. They did not do well as I expected they would. I tried every thing from making sure the arrows were balanced well and the arrows were paper tuned. I tied lining up the broadhead different ways with the fetching's. I then gave my buddy the remainder of my G5's and he had similar problems.
My other problem with arrow flight was when I was using my Muzzy's with the lighted nocks. I never had a problem until I installed the lighted nocks.
I am using the Fire Nocks, and they are not cheap at all. As soon as I put the field tips on the arrows with the fire nocks, my groups tightened right up. So I figured it had to be the combination of the Muzzy's and the fire nocks.
When I put the Rage broadhead's on, the groups stayed tight. I then tried the Muzzy's once again and my groups opened back up.
With the Rage and fire nocks, my groups are very tight. I busted a few nocks with them before I started shooting at different dots on the target.
The problem I was having with the Muzzy's and the Fire nocks was, the arrows were not consistent. I could of still used them to kill game, but they were not as good as I think they should of been.