Picking up pistol brass

[OkayShooter]

You should consider rigging up a fine mesh net on a mike stand or some other gooseneck floor stand.... catch the brass before they hit the ground.

Here's a readymade bench top setup... looks pretty easy to fabricate with some basic tools and supplies.....

Just buy a fishing net with smaller netting. Cut the handle and epoxy in a 1/4-20 nut coupler and can mount on any tripod.