I shoot split, but haven't yet tried 3 under. Will give it a try on Monday and see what I get.
-Jake

3 under. I just shoot better 3 under. I seem to pinch more split.

Hatchet Jack

Split...one over and two under. I don't know why. I've just always shot that way. All I can say is that it works for me.

I shoot three under and anchor with the middle finger in the corner of my mouth with my thumb knuckle behind my jaw.

With this method, I have very small gaps to 20 yards and is ideal for my aiming style which is split vision.