I know this thread's old, but I've been working with a Colt/Cooper 2012 in .308 & was curious about others' experiences. Searched & came up with this.
TJ, any updates?
You should, I'd think, be able to do much better than what you were getting when last heard from.
Last week my best 200-yard three-shot group on the gun's first outing was 5/16 of an inch with some old Hornady 165 TAP.
Today, best 3 at 200 was an even half-inch with Black Hills 165 Nosler Ballistic Tip.
Shot off a carpet-covered wooden box at my local range, 1.25-4 powered Leupold Patrol Scope (not the best to take full advantage of the rifle, but what I had on hand that was already wearing Leupold's heavy-duty alloy mounts to clamp on the rail).
Hadn't bothered with any break-in, didn't clean between sessions.
Probably about 110 or so rounds through it with four different 165-168 grain factory loads.
This has been my first experience with a Cooper product & I'm quite impressed.
They seem to shoot!
Denis