A suggestion: When you get your dirt berm built, cover the the face where the bullets will impact with old tires. The tires will keep the bullets from kicking the dirt way from the berm and lengthen the time before repairs will have to be performed. If some protective face is not used to control damage from repeated bullet strikes, the dirt will get shot away quickly.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill? (Exodus 22:18)