I bought an aftermarket over size tube set up off of this site that has a build in baffle, You might want to think about buying. It ia heavy duty plastic bottles that holds 25 pounds of shot. If you are interested let me know and I will find the information for you, I think the cost was just under a hundred dollars.
With the original bottles, no, a baffle won't do much of anything. I still have a 600 though I haven't used it much the last 10 years. So yeah, forget about it. Top off the powder when it gets about 3/4 or so of the way down.