competition mag holders-need a bit of help

[muddywings]

This is probably best for accessories forum but probably would get my quickest response here.

Being on permanent vacation, until who knows when, thanks to Congress/POTUS, I'm playing with some Kydex. I'm going to try a competition style mag pouch.

Here's where I need 30 seconds of help; can anybody mark how deep the mag sits in the mag pouch then measure from that mark down to the top of the rear of the bullet.
I just need to know how deep a mag sits in the mag pouch.
Just by looking at my first rough draft, I think mine is sitting to deep. Any help is appreciated!

First rough mold: