Hi all..
Here's a pellet trap I made for no more than the cost of a couple bricks of duct seal.
Find an old desktop computer, and rip all the guts out of it. Preferably, you want a computer that has a single removable side panel. If you don't know anyone throwing away an old computer, check
http://www.arrl.org/hamfests.html to find a hamfest near you. There's almost always somebody getting rid of an old PC for just a couple bucks or even for free at one of these events.
If there are disk drive bays and stuff on the inside of the case, you might need to drill out some rivets to remove those.
Using a dremel tool and a cutoff wheel, cut a rectangular hole in the removable side panel. Use a wire wheel attachment to
dull the sharp edges when you're done.
Ideally, cover up any holes in the front and back of the computer. I haven't done that yet -- you can see where the power supply used to be. I'll have to find a scrap of sheetmetal for that.
Put duct seal on the inside; use as much as you need for the FPE of your guns. This one's only going to be used with a P17 pistol, so a single layer is plenty. Use more for higher power airguns.
Lay a target over the hole, and go around the outside of the target with masking tape, so it's easy to see where to line the target up next time.
I cut up an old refrigerator magnet calendar into magnetic strips to hold on the target.
That's it! Instant pellet trap for practically zero cost.
I call it my Targeting Computer. I'm giving this one to my dad for Christmas, so don't anybody tell him.