commercially available pellet traps for up to .22

A cardboard box with rubber mulch and 2 old towels and duct tape best trap you will ever use very quite no one in the house will even know your shooting. Just plug the holes in front with duct tape, shake box after use good to go think I spent like $15 making mine been using it for 3 years now still going strong. I have shot it with .22 rimfire and it didn’t go through.
 
I make my own pellet traps. I start w/ a box from Amazon, (I let my cats play w/ the box first) ... after they're done, I fill the box up w/ old paperback books I mostly get for free or for next to nothing. Then I wrap the box & books w/ several layers of gorilla duct tape.

Then I start using it. I use sticky bullseyes for targets. After each group, I'll cover the group w/ more gorilla duct tape or just plain duct tape. I have yet to have a single pellet penetrate both sides of the trap and each trap I have has several hundred pellets in it.