i made a trap i reuse about 90 % of my bb's, i guess
i don't miss it to much
it's a 2 foot cube with a missing face, in the front of course, it has padding, foam foam and more fome, covered with a tough towel. Then at the front face i use corrugated cardboard as a false bottom, once they hit that their speed is killed and can't penetrate on the way out. Then u just take the false bottom off and pick up all those bb's.