I went out and bought a Echo CS-590 20 inch bar chain saw yesterday and will be starting to make my 150 yard shooting range the next few months, Lots of trees to cut down and build up for my berm, I want it to be 30 feet wide, 8 feet tall, once all the trees and brush are stacked I will bring in a few truck loads of dirt, the trees/brush should hold the dirt just fine.. that is at least my goal, Hopefull I can spend a few days every 2 weeks while home working on this..