Probably made in the 60s, rifle was friend's, dad's . Barrel is gone/ bad/ worn out. At smith's for new barrel. Receiver has crapolla mounts and rings. He was going to order a rail but didnt know what length action....... Hence this thread.
The rear scope mount hole spacing is smaller on the “magnum” actions .330 ish i think. The long action spacing is .880 i think. I think 264 win would be long and not magnum.