Need Backyard Range Advice

[MadMo44Mag]

We build one out of the beds off two old pickups filled with dirt.
We removed one side off each bed, stood them up side by side, bolted and welded,welded support legs on both sides,then painted them with epoxy paint and filled with dirt.
Once every three years or so, we removed the dirt, pulled out the lead, re-sold the lead to bullet caster and re-filled our berm.
Out front we used a 2x8 across the bottom to stop the dirt from spilling to far out.
Worked great, cost us less than 300.00 bucks and is still in use today.
After 20years they just now need a steel patch in a couple of spots due to repeated bullet impact.
The beds don't have to be pretty or real straight just functional.
Most savage yards will sell beds in poor shape for scape price.

[awmp]

You might call the NRA they have a department that is all about building ranges.

[Texas1911]

If you use dirt or sand, be sure to construct some means of erosion resistance. A good rain can do a number.