There are any number of reasons supposedly why Savage rifles are supposed to be more accurate than the competition, on average (individual specimens not withstanding). Savage uses a floating bolt head, which eliminates/reduces one big 'problem' that Remchesters have, making sure the bolt lugs are both bearing on their recesses. Savage uses button rifled barrels instead of hammer forged (Kind of weird looking down a Savage barrel... the tops of the lands look all nasty w/ tool chatter marks from boring the hole, but the bottom of the lands look polished and smooth, almost perfect like a custom barrel). And finally, the barrel nut system allows them to control headspace to a fine degree during assembly. Not sure how much are they put into individual rifles w/ concern to headspace as compared to Remchesters, but from what I've gathered they tend to be a little snugger and closer to minimum.
HTH,
Monte