That is the best way that I have heard it explained.It's pretty accurate, plus or minus a couple of years.
Way too many video watchers on here that watch the shows from the Midwest and try to compare Georgia deer to those out there.
A very, very small percentage of GA bucks will hit 130 as a 3 year old, most won't at 5-6.
When someone says they killed a 140 inch 3 year old, I immediately subtract 10-12 inches and add 1-3 years to the age.