I am around a 11 handicap player (with a far better long game than short excluding putting).
I carry my driver about 265 yards with a very slight fade. Also, I have no problems with slicing any club in my bag.
I usually swing my driver with about 75% effort.
My driver is a 9deg RBZ with a UST Proforce V2 Stiff.
However, when I try to swing a bit faster or a bit harder for more distance, i usually tend to push it. To counteract this, I try the same...