Phaedrus,

The problem with the chest rig is that if you do not move the left arm back parallel with and along the left side, or up high, the manouver as you describe will sweep the left arm. You may be doing it, but none of the videos or pictures are. The sweep the left arm every time. You must move the arm or lower the muzzle until the weapon is pointed forward. I think the latter is best, just like the crossdraw, because it will not sweep your companion or others to your left.

Respectfully,

Jerry