Ummm... Facing rear, as some instructors here previously mentioned, makes it so you DON'T have to rotate your hand.
Incorrect. Take your hand palm down and stick your index finger down at your belt line.
Now raise it to the halway point, pointing in front of you.
Then raise it in front of your face (palm toward you).
This is the most natural motion for your hand. Bullet to he rear means that at some poin you either ae flipping the mag to get the bullet forqard, or are doing it wrong
The way I see it is that is the most neutral position and requires only/mostly elbow movement, not wrist/finger manipulation. I would post a video from my phone. But I'm at my patients house.