post #19 of 19
Originally Posted by iacas View Post


@mvmac is telling you to hit the ball. It's the impact at high speeds which transfers the line on the back of the ball to your clubface.


Yeah want it to look something like this





Originally Posted by JonMA1 View Post

Finally got around to performing this test. Used a 5i, 8i and PW. The vertical marks were only about 1/4" on the club faces, but they looked to be as perpendicular to the grooves as could be.