All of the AR's I've owned ( with a free float fore end anyway) are as accurate as most bolt actions. With a little load development and a good optic groups of 3/4" at 100 yards are common. My Bushmaster Varminter with heavy 24" barrel and a 6-18x scope would do 1/2" groups. Most hunting I've done with the Ar has been prairie dogs with the Varminter. I don't consider the .223/5.56mm a big game caliber, but have on occasion shot smaller deer at closer ranges with them and it did the job. I recently bought a Remington R-25 in .243. It comes with a Mossy Oak Treestand camo job. If you are only going to hunt deer, ( or bigger game) an AR in .338 Federal, .308, 7mm-08 or .260 Remington would be better than the smaller calibers, but not as good for varmints. For deer AND varmints, it's hard to beat a .243. Nearly double the energy of a .223, better in the wind and more game bullets available. Very flat shooting and much less recoil than the .308 and larger. I love the .308, I have 2 of them, but don't enjoy shooting varmints with them like the smaller calibers. A pic of the Remington .243, I just put a better scope and higher mount on it than the one in the picture. A Minox 4.5-14x with BDC, under $300 but the glass (made in Wetzlar Germany) blows away my Vortex Viper, Nikon M-308 and Leupold VX-III. I believe that Zeiss and Leica use the same glass from Wetzlar. I compared it to a Zeiss HD 5 that costs 3 times as much and I could not see an appreciable difference. I loaded up some Hornady 87 grain V-MAX to try but the wind has been unbelievable out here in the open plains, 40 to 60 mph the last few days, hard to get good groups to test loads in that kind of wind. The lighter varmint bullets in .243, like the 55 and 58 grain ones can get 3800 fps. and are truly "Varmint grenades", but are pretty stubby in length and lose velocity faster. I went with a heavier longer 87 grain Hornady V-Max, theoretically should be more accurate than the extreme light bullets, and I will use a Nosler 90 grain Accubond for deer and antelope. The two bullets have a similar B.C. and should simplify things not having to learn way different drop values like I'd have to do if I used a 55 grain for varmints and a 105 grain for deer.