81 at Lighthouse Sound in Ocean City, MD. At the 18th hit a booming drive to leave me 150 out to a green perched atop a hill. My second hit the front of the green and rolled back down the hill. Proceeded to par the hole and shot 81. Shoulda, coulda, woulda kind of hole....
I originally picked 70-75, but switched to 75-80 because I think that reflects my true ability more closely. Not sure why the options overlap.
Anyway, I have shot a 75, but it was a on a 58xx yard course so the differential is about the same as my 78 on a 64xx yard course. I feel like the 78 was a better round, but the score, in and of itself, doesn't show that.
I use to shoot a few rounds in the 77-79 range every year. That was a decade, or so ago. These were always on courses I was very familiar with. Especially the greens.
The round I am most proud of was an 83 at the Spy Glass course at Pebble Beach. That was a great ball striking day for me. My caddy even said it was one of the better amateur rounds he had been part of. May 10th, 2003.
I voted based on 18-hole rounds on regulation courses, which is a type of round I only play perhaps 2 to 4 times a year. For that it's a 96. I've gotten a 46 and a bunch of 47's playing 9-hole rounds on regulation courses. I find it tough to avoid 7's and 8's (or worse) towards the end of 18 holes on a long course!