Which nozzles for 12 volt pumps

Which nozzles sizes should i use for 5.5 gpm and 7 gpm 12 volts? Since they dont exactly put out what they say after hose length? Should i get nozzles for the branding gpm? Or should i get smaller ones to match exact output?

I use a #40 in 0, 15, 25, and 40 degree with a 7 gpm Delavan. They work great. It’s the same jrod you can select from Pressure Tek for down streaming with a 4gpm pressure washer. It works good for the 5.5 gpm too but could probably go down to the jrod for a 2-3 pressure washer if you wanted to.