My personal best in competition is a 68 (-4 from the tips) in a MPGA event.
I've shot 64 on a par 70 county course during league play, but the course is only 5800 yards so I don't really count that.

My worst round in competition was a 90 I shot (also in an MPGA event) about 3 weeks before my 68. Although the scores were on different courses, the difference in scores raised some eyebrows. There is no way to explain but I know I played the best I could on both days.

When it comes to telling people about your scores, or your round, I always think of the old adage....."90% of the people you tell about your score just don't care what you shot...and the other 10% wish you would've shot worse". Are you a 90 percenter or a 10 percenter?