I prefer a Teejet AA23L 7676-24 with the proper size fan tip to apply the desired volume/M. At 40PSI at the gun and normal walking speed, an XR11008 tip puts down 1 gallon. I have no problems getting contact herbicides such as MSMA or Quicksilver to work. I do have a Teejet AA31 with a 45 elbow and a Turbofloodjet nozzle TFVS10. At 40 PSI, this puts down 3 gallons per M. I save this for fertilizers only. Floodjet nozzles do not have the defined pattern, flat fan nozzles do and leaf coverage is poor. For shrub work, its a wand with two disc-core nozzles on a swivel and an Arag Turbo Gun for tall trees.