Agreed! The only problem with a super accurate AR is the lack of energy at ranges that are actually entertaining. We shoot steel out to 750ish with ARs, and there's damn little indication of a hit, even looking through a Swarovski spotter. I'm considering having someone make me some AR500 targets out of 1/4" or thinner material just to reduce the mass and get some movement.
With a hot-shit AR and good ammo, a full size IPSC silloutte at 750 is stupidly easy once you get the wind dialed. The trick is knowing if you hit it or not. A 6X6 plate is good fun at 500, and you get lots more movement.