Not a hand gun shooter, but wonder if holding it like that would interfere with ejection of spent shells.
Being left handed, and given the ejection pattern of my 1911, I'd wind up having the hot cases hit me in the knees or shins.
For a righty, my guess is that it would launch them over his head.
Mark
Lol. Depends. One of my guns seemed to *always* give me a hot shell down my shirt front :). Whatever way it was aimed.