Doc;
Long-range .50 target competitions are a growing interest, using both paper and steel targets.
Not intended as an in-your-face question, but really, why is it anybody else's business what "law-abiding citizens" do with them?
It's a piece of private property to be used as one will, as long as they don't harm anyone else or their property.
What other "law-abiding citizens" do with their guns is no more anyone's business than what those "law-abiding citizens" do in the bathroom.