Bruiser, I have a metal rimfire trap too, but it's just too loud for indoor use. It will stop the most power airgun I have (and then some), but I want something quiet. I like the silent traps Archer Airgun sells, but I'm too cheap to buy one . Maybe with my very limited woodworking skills and tools, I can cobble something together. Nathan
Yes I have used them before but! do be careful when using high powered riflesGood idea to pack with duct sealIMO just save abit more & get alot! more with purchasing one of thesehttp://www.midwayusa.com/viewproduct/?productnumber=744831