i know this wont quite answer your question but here is my experience with RRA uppers
my rra national match is sub moa with iron sights at 300 yards. uses the same barrel as their varmint version.
their high end barrels are made by wilson which is one of the better barrel makers out there.
3 shot 300 yards
6 at 300 yards
the rifle. RRA National Match A2
my opinion go for it. RRA makes good stuff. you have to go really far to find better and it wont be cheaper.
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Last edited by JonM; 02-22-2012 at 01:54 AM.