Lot's of good advice here about trying surface changes first before going the re-drill route. I agree -- exhaust all options with surface first.
But sometimes that doesn't do the trick. I've found on a few balls/drills, I couldn't "surface" my way to an acceptable reaction. I have a Motiv Primal Scream where I set the pin a little too far from my PAP (bad experiment), and it's not working for me. I've tried almost everything from 1000 w/no polish to 4000 w/polish, and it's a no-go.
I don't like re-drills, but in my current case it's either that or get rid of it. My sense is that it will be a good ball with the appropriate drill, so I'm probably going to bite bullet and try.