Also forces you to align your shoulders. I anchor with the thumb knuckle at the back corner of my jaw, index at the corner of my mouth. Often when I have shot way too many arrows I start getting erratic. Without fail, due to fatigue, my index is still making it to the corner of my mouth but I’m short drawing and it’s evident due to my thumb not getting all the way back to my jaw. Two points of contact are always better.
One more thing related to “release “ issues. If your shoulders are aligned, you cannot make a bad release unless you creep forward into “holding “ vs pulling. If you feel the skin on your jaw pushed forward at full draw, you are holding and not pulling. Thought it might help Be award because it is not noticeable if you are not looking for it.
Any difference in penetration?