It can depend a lot of if your blade is new, dull, or nicked. With a good blade I would think 90-110 would be more than enough, so you may have other issues if that doesn't do it. There's no reason not to try 50 or 150 though, and see of that changes anything. I'd also lower the speed to 400 just to see if that's helpful as well.
If you describe the problem in a little bit more detail, folks on here may have better suggestions.