Cut chart vs actual cut speed

I have a razorweld 45 and when I use the cut chart I enter the cut speed off the chart, but when I go to actually cut I have to slow down to 60-70 percent to get a good cut. My question is there a setting on fusion I can adjust to help the cut speeds be a little more accurate?

Fusion allows you to set the cut speed in the profile portion of the Manufacturing tab.