None of the H&R 65's where drilled and tapped for scope bases. There have been two on Gunbroker for sometime now and both of them are drilled and tapped for scope bases. I just sold one with two holes D&T'd one hole under the rear sight and one hole just in front of the rear sight. I got more money for mine than what you paid for yours. Plus the one I sold the serial number was couple hundred above 17,000. Keep tthe rifle clean and well oiled to cut down on malfunctions. Also none of these Military rifles are marked with US Property. Well almost none are but couple have showed up with "flaming bomb" stamps and couple with USMC stamped on them. I have never seen one in person only pictures posted.
I don't think anyone knows for sure what the serial number range is Military correct rifles. Some thought is a serial number less than 17,000. I am not sure where I seen this 17,000 number though.