I built this bullet trap in the back yard to do some testing before the full range goes into place.
6"x6"x12' Treated posts set in concrete, 8' above grade.
Rubber roofing membrane stapled to posts, front and back.
3/4"x4'x8' Treated plywood mounted to back of posts.
2"x10"x4' Pine boards lag bolted to front of posts.
Fill Structure with dry sand.
Structure Is capped and treated with exterior deck stain.
Tested range is from 5m to 75m.
Tested ammunition: 22lr, 9mm, .357, 45ACP, .223, .308, 30-06, 7.62x39, 5.56 NATO, 7.62NATO, 12ga 3" Magnum. Multiple hits.
Results: All rounds were trapped within back stop except for test rounds (7.62x39) near bottom sides where 6"x6" posts meet sand cavity.
The rubber membrane was used to prevent sand from leaving cavity.
The boards mounted to front of back stop can be replaced due to wear.
I will continue to post pics of construction and modifications.
BT1.jpg
BT2.jpg
BT3.jpg
BT4.jpg