Sean,
Take a look at OL Adcock's tuning information under his website. This should help you with the confusion...or make it worse. His bareshafting technique will help clear things up. It basically boils down to this. If your shafts are flying to the right of the target when compared to fletched shafts, they are too weak. This typically happens because the arrows are flying TAIL LEFT. The reason he doesn't recommend using the tail as the indicator is that there are many things that can be attributed to a less than perfect release. This said, a consistent tail left arrow in a right handed shooter typically represents an arrow that is too weak. Furthermore, in my own experience with Grizzlysticks (which I happen to like), the Sitkas are going to be too weak at 30" in a 50+ pound bow with 200 grain heads. Best wishes, Brady