For a significant number of us, we play during the winters at our down south clubs. For the most part I could only guess, that the test of golf is not as difficult as Mad River. The opposite could be the case but that would be an anomaly.
To summarize the link I provided you with, you ought to know that your cap can only climb as much as 5 in the a calendar year, from your lowest recorded index. If you take into account your lowest index, after it rises 3 index points, it will only allow a 50% moving upwards, and after 5 it will not rise any further. It’s obvious why this feature was put into place. It does not address those who play two very different golf courses or those that may have had major surgeries and come back saddled with the caps they had prior to those surgeries. Ask Brian Usher Jones after being off for an entire season.
Lastly the PCC attached to a score. Playing Conditions Calculation is a mechanism where the system detects tougher then usual conditions that change the differential in your course rating. For those of you that played in the Club C, look at your scores for August 12th vs. August 13th. Same course, Same tees. That too could slightly affect how your cap is derived.