The 40X receivers are etched with the Remington logo rather than stamped like the 700s, at least the ones that I've seen have been done that way. Supposedly for stress-relief reasons. I'm a great admirer of most older Remington rifles for their accuracy, don't know about the newer ones since ~1980. My friend who lends me the benchmark testing rifle has about a dozen 40Xs in calibers from 22LR to 300 Magnum, they are largely unsurpassed for accuracy but still look like they're mass-produced.
At one time the 6.5 Arisaka TG/FP was a preferred upgrade for a custom short-action Remington, either 722 or short 700, but now that the collector price has risen it's become cost-prohibitive. Too bad.
Regards, Joe