I suppose the real answer is that I just don't know unless I look at your hands or you test it against a known 30° angle. My left hand pistol is 85-90°, while my right hand pistol is only about a 70° angle. That's just too much variation between my own hands, let alone multiple people!
For me, this would be a horrible "rule of thumb."
Last edited by Trooper; 09-18-2010 at 15:02..