If we don't use them, then how do we practice to make sure that when we need them, we know how to use them?
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I would suggest a target range, cans and bottles on fence posts and for the experts, the elusive skeet and of course, rats in a small-town dump. I would check with the dump keepers. There was no problem in Randal, Washington, because the local cop (actually the local State Patrolman) was a local and frequent participant. I would NOT recommend shooting into the air from your porch, which some of my halfwitted neighbors do to celebrate July 4 and New Year's Eve. What goes up, must come down.