I technically have two ranges:
At my house, I have 175yds from my back porch to the base of my woods. There I have Railroad ties set in a wide V with dirt filling up to about 5ft. I'd like to move that set just into my woods and make the berm more like 7-10ft.
At my dads farm (1/4 mile down the road), set on the corner of his field I made a berm out of old tires with t-posts and fill and surrounded by dirt. This berm is about 5-6ft tall. Behind this berm is a 10 acre woods and 1.5miles before you hit any other home (google maps).
How big are you guys making your berms? I work at a tree service, so I also planning on bringing a big load of logs to help reinforce the back and cut down on the amount of dirt I need.