Originally Posted by GreenLight
Sorry, I know it's argumentative, but really this isn't altogether true. MP's use less water because they don't have as large of a radial pattern as a true standard rotor in most cases.
Every mp has a higher precip rate than RB standard nozzles until you get to the 4.0, based on 45 psi.
I'll be equally as argumentative and say it isn't about radius at all, it is about distribution uniformity.