Primary source is myself, I shoot the same programs as those in the olympic, and more.

And sure, if you use it like that it's something else. I was primarily thinking of what's allowed in the programs I know of, where "two hands" means both hands on the gun.

edit: I don't think bracing would make a huge difference anyway, unless you're fairly new. The primary source of error, by far, is due to sight misalignment, not the general direction you're aiming. And bracing would only help with stabilizing the general directionyou aim.