I'm looking to extend my personal range and had a few questions. Has anybody here ever used old tires filled with dirt as a backstop. I'd be using a few rows deep and stacked as high as need be. Also, what are the preferred mounting options for steel plates? I've seen them solid mounded at a downward angle, hanging with chains, and where they fall down. I will be getting some ar500 targets but want to hear some ideas on mounting.