I tried it as well and it's awkward and does not work for me. I find that if my weak side hand is that far out on the for end, the rifle tends to sway. I like to keep my elbow tight into my body for better support. If it works for you use it, not every technique works for every shooter.
How are you holding it is the key and how far, you have more sway holding magwell or elbow down in most cases we show this to students in classes a lot also varies on the stance as well like i said its not for everyone but there are ways to be shown and tweaked in classes by the inst, other than just trying it