Easy Duel wins
When duelling, you'll have a short cutscene, then you'll see in the bottom right hand corner, two meters appear. As soon as those meters appear, draw & aim your weapon. You can either draw back on the right analogue stick & flick it forwards, or press L2 to give the same effect, then you can either move the reticule to your opponents right hand, or move it up to their chest/head.
Now the tricky part. In order to win your duel, you must have your meter, which is the left hand meter, filled up higher than your opponents at the end of the slow mo in order to win. Now, your reticule will flash between red and white. You want to click R2 to shoot when the reticule is WHITE. That will not only give you more accuracy, but fill your meter up faster than your opponent. If you get it right, you'll only need to press fire once & you'll almost fill your meter up completely. Then you'll win your duel.
Added by: sphynxx May 25th 2010, ID#2750