I have never used a dado blade before and just bought my first. It is a Freud 8" SD208
I set it up according to the chart that came with it for a 3/4" dado. (both outside blades and 4 - 1/8" chippers, no shims)
After making a test cut I found the dado was 1/32" light.

Is this common and I just need to add a shim or is something wrong with my setup or the blades themselves.

Also, there are no sizes marked on the differnt size shims and the chart really isn't clear about which ones (even if they were marked) should be used for differnt sized dados.

Is this chart supposed to be accurate or is it just a basic guide and it is expected that adjustments will need to be made.
Thanks, Joe