The curtains on this trap slow the pellet down so much that you cannot even here the steel plate being hit. (not sure it did hit). The pellet itself (kodiack) was on the bottom and only took a small scratch. That said, I am going to buy a "Archer pellet trap". One, because I want a second one, and two, it is a little larger.
(Note) Big difference in the Gamo trap and the Crosman. The curtains make all the difference in the world. That and the fact that I doubt a 22.cal short could go through the trap.
Good shooting
Dave@vach
link to Archer trap
http://www.archerairguns.com/airgun-pellet-trap-s/6.htm