You shouldn't trust your life to anything "out of the box".
Mechanical devises need to run a bit, for all the parts to "settle in" and "get used to working together". You can pay through the nose for a custom fitted and tuned gun, and expect it to be fully ready when you put your hands on it, that's what you're paying extra to get.
You won't get that from a commercial off the shelf common production gun. You might get a gun that runs flawlessly right out of the box, I've had them, but you shouldn't count on that.
The recommended 2-300rnd breaking in period is recommended for a reason. If you think you don't need that. fine, roll your dice, its your gun, your wallet, and your life. (also consider that the break in isn't just for the gun, its for the gun AND the shooter)
I've had actual Colt Govt Models that ran fine from day one. had others that didn't. Bought a Browning BDA .45 in 1980, (early model Sig P220) its been flawless since the beginning as well.
Another point to consider, is "to work out of the box" with what?? GI ball? some special JHP?? target SWCs? ALL interchangeable? what are you expectations, really??