I recently re-barreled my .308 Hog Hunter to 6.5 CM using an Apache Gun Works barrel. First, I'd like to say that this barrel is as smooth as a baby bottom when cleaning. Very impressive.
I have a Burris variable power scope mounted on a Weaver 1 piece rail.

My problem is, after 9 different loads using 2 different powders and 4 different bullet weights, plus 2 different stocks (factory and Boyds), the best I can get at 100 yards is 1.5- 2.0 inch groups.
As a control, I shot Prime factory 6.5 ammo with the same group results.

At first I thought the problem was my lack of shooting experience using a scope. Watching the crosshairs move in time with my heartbeat was really disconcerting.
So, I had 2 friends shoot the factory rounds and their results were similar to mine.

Is there anything that I'm overlooking, missing, or doing wrong that is causing these poor groups?
Also to note, with the original factory .308 barrel, groups hovered around 1.5 inches at 100 yds.

Any thoughts or suggestions are appreciated.