I was out shooting at 500 yards yesterday. Typically I can hit tennis balls that far away, but my groups were about 8 inches!! At first i thought it was because my scope had moved, so i fixed that issue and went back out. same thing. I was using 168 gr amax superformance match rounds that typically put me at .5 MOA or less at 100 yards. This is evident in my picture... Iv never taken these out to 500. Iv always used the FGMM before 500 yard and farther shots. I'm going to clean my barrel and try again, but needless to say, I'm pretty disappointed with these rounds. How many rounds do most of you shoot before you have to get rid of copper fouling? Hoping that's the issue.