ace, have you tried shooting a few groups the old fashioned way...front and rear of stock on sandbags with a good cheek weld, butt snug against your shoulder, top of your trigger finger squeezing real nice while you sight with a clearly centered sight picture?

I feel a bit uncomfortable making such an obvious and simple suggestion to an experienced shooter but sometimes it is the simple things which perplex us most.

Just a thought.

Best wishes and good luck.