Ideally you should take the carb off the car and test it on a bench. You need to first check the pump diaphragm to make sure it is not ripped/cracked etc. Assuming it is functional you need to have the float bowl full of some liquid and determine the time interval of the stroke i.e. the time period that fuel comes out of the pump orifice usually 1- 1.5 seconds.
The stroke is not linear !
Once you have it back on the car, I would adjust the nut gradually either in or out, being mindful of the time (1-1.5 sec) for reference.
The accelerator pump should add sufficient fuel to the mixture to eliminate flat spots during throttle roll-in.
It may be adding too much fuel so you need to be mindful of that as well...
ReV
