I am interested in building a bullet trap / backstop.  One of the leading designs uses shredded rubber.  Does anyone know of a company that shreds old tires in metro Atlanta?  Someone in the Marietta area would be preferable.  I can provide the tires.  Alternatively, does anyone know where to buy bulk'ish rubber crumb of the low processed variety (i.e. the cheap stuff not the highly processed version that you find for landscaping and playgrounds).

I know there is a place somewhere in Butts Co.  Sorry I can't be any more specific.