I have a 760 in .257 Roberts. If I am reading the barrel code correctly it was made in 1954. It is factory drilled (and stocked) for scope use. I have only shot Winchester 117 grain power points (+P) in it so far. I have a box of Light Mags to try when time permits.
It is a very nice rifle with the "five diamond" checkering pattern on the forearm. The plastic grip cap features a running buck in relief. Just some neat older touches on a nice hunting rifle. It will shoot 1.5 groups with a Weaver K3 and the factory winchester ammo.
I made a .308 Carbine out of a 1953 30-06. Ordered the carbine barrel and mags from www.e-gunparts
Ended up having to get a bolt also, as the original 30-06 bolt would not mate up to the barrel extension on the .308 Carbine barrel. The switch took about 1/2 an hour, just need a proper sized punch to turn off the forearm tube. I also did a little grinding on the metal ejection port cover from the -06 so I could use it on the carbine. Very easy to do on a pedestal grinder. Most of the time is spent holding the ejection port cover in place as the barrel/barrel extension assembly is put in place, and the forearm tube turned in. The headspace checked out fine and the carbine is quite accurate. And very handy. I put a 2X7 Redfield on it.
Next phase will be a cleaning up of some pitting on the carbine reciever, a reblue, and refinish of the forearm and buttstock. Everytime I get ready to do it hunting season is coming up and I end up waiting.
Of course I'm keeping the .257 as it came from Remington. It's in great shape.