Looking for guidance of the safety minded. My AR500 targets are here and ready. My plan is to hang the targets angled. Slightly angled on chains or straps, top-forward, bottom back, The targets will never be moved, as they are on my property. The targets will be for handgun only, at a distance +/- 25yds. There is an out-building 20ft left. And 150ft to the right, right another structure. I have a concern about side fragmentation when the target is hit. Given the height of the targets, I'm considering rows of automobile tires, in stacks, 2ft. higher than the targets, on both sides. Question> Will the rows of tires be enough to stop side deflection?