What should Impact Stroke Speed be?

The goal of Impact Stroke Speed it to create the appropriate ball speed for precise distance control.

The ideal Stroke Speed will depend on a few conditions…the stimp of the green, the slope of the green, and the distance of the putt.

For example: On a flat or almost zero degree slope, on a 3 foot putt, an ideal Impact Stroke Speed is around 1.5 MPH, a 6-foot putt requires a Stroke Speed of around 2.0 MPH, and a 12-foot putt requires a Stroke Speed of around 3.0 MPH.
These are great baseline numbers to strive for, but will have to be adjusted if putting on different slopes and different stimp greens. You will need a faster Stroke Speed on slower stimp greens or putting on uphill slopes, and you will need a slower Stroke Speed on faster stimp greens or putting on downhill slopes.

Putts from the same location should have the same Impact Stroke Speed, repeated to within approximately 0.2 MPH.