What exactly is a "setting chart"?? Been using a powder measure for a long time+I have never used one??
Throw a charge-if too light-open up the chamber-if too heavy close up the chamber. Keep doing this until you get the exact charge.
You MUST have a good scale to do this--You need a good scale anyway..Bill.
I haven't bought a new 55 thrower in a long time and I don't know how up to date they keep the chart. Regardless, it just gets you in the ballpark and you have to finalize the setup by scale.