Don't listen to those people you CAN play golf with that grip. You can win majors with that grip. You can be considered the best ballstriker of all time with that grip.
The key is knowing HOW YOU MUST RELEASE. So go get your hammer . . .
Here's some pics of my grip would be interested to hear your thoughts. I use the way my left hand naturally hangs as a guide. Ends up being a grip that most pros say is way too strong... my standard shot shape is a slight draw with the irons tending to a hook with the woods. The hardest shot for me to hit is left to right (fade or slice)
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