Shooting my age was what I thought was an unattainable goal for me because despite playing a lot (scratch) when in HS and College in my adult life (e.g.the past 40+ years), golf was an on/off activity. Some years, I might play 20 rounds and others 0-4. Not conducive to a low index or consistent play but thanks to muscle memory, I was usually able to play well enough to keep my interest.
2 years ago and in anticipation of retirement,I started playing my local municipal course. I had lived less than 2 miles from this very nice muni for 16 years and and only played there 3 times. I joined the men's club and started playing 2-3 times a week, Initial index was 9 and that quickly dropped to 6 in the first few months. New clubs and a bit of practice and I was a solid 6 with a goal of 4-5 index.
Two weeks ago while playing a relatively short (6K yds) but very challenging par 70 mountain course with big elevation changes and no flat lies I did it. I had a solid 36 one bogie front nine but on the back it all came together, I hit every green in reg and had makeable birdie putts on each hole. I made 3 of the tougher ones and followed that up with an eagle chipin on the par 5 16th. Missed very makeable birdie putts on 17 and 18 for a 5 under 30 back nine and a 66 (one under my age!). As my son said it's kind of an epic achievement for a life long golfer.
BTW, this round dropped my index to 4.3 and so for the time being, net tournaments are out ...