What have you found to be the quietest backer for your targets? Looking for something to silence the pop of the pellet hitting the paper. Thanks for your helpful ideas.
Not mounted to wood, have put 3/8 thick dense foam mat behind the paper but can still hear the pellets hitting. Just looking for other options. Don't know if there are any. I can hear the action of the spring then the pop of the pellet impacting the paper.If the paper is loud and not the backdrop, I don't know what to suggest other than cotton t shirt material.
I have to be misunderstanding your scenario. Hammer strikes should be louder than pellet vs paper. Is it mounted directly to plywood?