Simple - your not full snatching right. Stop all powers for a while and concentrate and the snatch as a lift by itself - not a power then a jump under but one single lift of snatch like you would with a squat. If your power is that close you may also have hip and/or ankle flexibility isssues. If not then need to practice snatch, snatch, snatch. The power snatch is not the full snatch and is not even close to it as it is much, much simpler. I think sometimes we can go power crazy and try to derive full lift maxes from powers, really it should be the other way around. Don't worry about power snatching worry about snatching first. There are no world records for power snatch. No one ever got better at throwing curveballs by throwing fastballs.Ryan
Another point - forget about pull overextending under-extending, etc. Again, your trying to compartmentalize something that just is. It is just snatch remember that. No first pull, second pull, triple joint extension, pull under, catch, stand up. It is just snatch, the end. To think overextend or don't underextend on a lift that takes less than 1 second to complete = the kiss of death. Just grab the bar, empty your mind and let your body move and you may find the secret.Ryan