To answer a few of you guys questions.

I'd offer the suggestion did you spin test those bheads?
I’m using Goldtips with Slick Tricks and they spin fine.

What bheight are you using? Some of the Excal crowd claim there's a 'sweet spot' at 1 1/8" which is w/ serving just touching the inside of high mark, I tend to agree.
Brace height is marked at 1 1/8"
Shoot the bow some more to make sure it's wasn't THAT arrow or some other factor, like loose scope mounts or even scope going bad.
Shot the bow, consistantly hits low and right. I use a Nikon rifle scope on my Excal, have been for years, what do you guys think about rifle scopes on crossbows?

xbowbarry