Which is more accurate out of the box? Shoot twenty, 5-shot groups with appropriate ammo and compare. With forum posts you will see statements to the effect "Get Rifle A; It is way more accurate than rifle B!" Not data will be given to support the claim.
Suggestion: The Remington VLS (Varmint Laminated Stock) is still in the Remington 700 lineup. It has a heavy barrel and, as indicated, a laminated stock. I have one in .308. For example, using a handload of 39.8 gr IMR 3031 pushing a Sierra 168-gr match bullet, I shot five consecutive, 5-shot groups averaging 0.65" at 100 yards. One chambered for .223 should do somewhat better.
Suggestion: The Remington VLS (Varmint Laminated Stock) is still in the Remington 700 lineup. It has a heavy barrel and, as indicated, a laminated stock. I have one in .308. For example, using a handload of 39.8 gr IMR 3031 pushing a Sierra 168-gr match bullet, I shot five consecutive, 5-shot groups averaging 0.65" at 100 yards. One chambered for .223 should do somewhat better.