u'd have to be out of your mind to go
to any sort of 'battle" with no more than a bolt action. You can't manage better than 1 hit per second, with the best of them, on a man silhohuetter at a mere 25m, even from the bipod. With a good(scoped) AR from the bipod, you can get another hit in one second, on a fully exposed torso at nearly 300m, or a head on prone man at 200m. Misses are at least 100x as common as hits when you are being shot-at, you know., An enemy having buddies is pretty commonplace, also.
So ease of repeat and multiple target engagement is a huge factor in a combat rifle, and no bolt action even comes close to a good autoloader in this regard. The bolt actions also need a $300 custom installation of luminous sights. It is dark half of the time, you know.
For those who "think" that the 223 is inadquate in power, beyond 200m, it can have more power left at 400m than a 4" 357 has at 10 ft. Nearly everyone concedes that such a 357 is a very good manstopper, loaded with 125 gr jhp's, given a good chest hit. Where would you rather have a failure to stop? At axe swinging range or at 1/4 mile, hmm? At 1/4 mile, if you are using cover properly, the enemy couldn't hit you, even before you chest hit him with the 223. You'd be safe from such a "hittee", using cover as you should be, at 100m, much less at 400m. A 75 gr V Max Horady softpoint will still expand in flesh just fine at 400m, you know, if it's driven to 2800 fps in a 24" barrel to start with.