Originally Posted by John Kaupp
Try dropping the elbows to get a more vertical forearm position to drive the bar up more.
I'm going to completely disagree with this. In my experience, most people that drop their elbows tend to lose the bar forward even more... The bar starts resting on the wrists instead of the more powerful shelf created by the shoulders. Also, it tends to cause people to use arms during the drive portion of the jerk. The arms don't drive the bar up... they push your body DOWN.
If anything I would say drive your elbows up as much as you can (as long as you've regripped for the jerk) during the dip/drive and allow your legs to really maximize the drive to get the bar up. The arms only come into play AFTER the legs have stopped driving.