Shockers do have pretty crappy stock triggers. The stock one I had used to have alot of wobble.
The best way of sorting it, as Skeet suggests, is to buy a new trigger, and the suggested companies he mentioned are best
CP make some pretty groovy triggers for the Shocker with a nice smooth pull, not sure about the wobble though. Don't experience much with my Rip trigger, it's quite chunky.
Russ