So, I had an interesting weekend.
Ran into a machinist/hobbyist buddy of mine who took a real interest in the issues I was having with this rifle. Maybe more of a interest in proving me wrong and exposing some stupid mistake that I had made as the situation seems very odd. But in any event he did all the same things I did we even tried a new set of rings I bought with the same result. Took the scope and rings off, took the barrel off, reassembled and test fired. Same result. Repeat....same result. The bore was offline somehow but why? Hmmmm
So his next thought was shoot the thing so that's what we did. I purchased a set of Millet Angle Loc rings as I mentioned above. These rings didn't solve the problem but it did get the rifle on paper. Grouping was shotgun like for the first 50 rounds or so until the rounds stopped hitting the paper all together. We then zero'd the windage on the scope, dialed the scope in line with the bore again using the rings and started the process all over again. Bamm, it was on paper. Made a few little tweaks with the windage and elevation and got it close to the bull. Grouping was around 1 inch at 25 yards and after above 50 rounds it started to tighten up. I switched to the 50 yard target and things continued to improve with the odd group being over an inch and some tighter with a few fliers here and there. By the end of the day and 200 rounds later my last three groups were under 1/2 inch. Looking through the scope and bore now lines up on the same general location (I didn't have a boresight this time so I did it old school). The rifle likes CCI SV more than Lapua Rifle Match which is interesting but also good for my wallet.
So the rifle shoots now. What the hell was going on before and how did it "fix" itself? Something in the bore? Rough crown?
On a side note I purchased this rifle NIB for a CGN member. When I explained this problem to him he was extremely supportive and he was going to give me a refund for the rifle. I'm glad I couldn't make it down to meet him last week and decided to spend a bit more time with this rifle. Still, its nice to know the kind of people that are on this forum.
I hope this rifle stays shooting true and doesn't revert back to its former attitude problems.