I decide to reopen this thread, I been trying to figure out this issue on my own and since then I been shooting my riffle almost every week, and do you remember shot groups I posted previously, forget it, now I hardly get 0.9 MOA out of it and today at 500 yards I shot 7.5"- 9" 3 shot groups compare what I had year ago 2.8" - 3". Can the barrel get worn out that quickly, I probably only had 1K rounds through it???