I change clubs and dropped my h'cap by 2 shots over the space of a year - doesn't sound earth shattering, but it was a 50% reduction.
I found that the new course highlighted a part of my game that wasn't particularly good but wasn't exposed at the previous course. My mid to long irons became a lot better as the course required me to use them much more.
This meant I went to away clubs in big competitions with a better rounded game, scored much better and got the cuts to show.
