I'm thinking of making my own pistol and rifle range out here at my dad's office.  I know I should have a good berm.. and maybe even a berm seperating the pistol and rifle lanes.  Is there any certain type of berm I need to push up?  A certain amount of feet?  I've heard of some stuff called Ballistic Sand but can't find much info on it.  

I was also wanting to ask if anyone here knew of a webpage that had say a "manual" on it.

Thanks

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[img]http://store.nrahq.org/nra/assets/product_images/detail/10003.jpg[/img]

Thanks!