I was talking to my buddy this morning and, as usual, the topic swung around to gun stuff. I asked him about the gas seal he had made years ago for the Sile Sharps paper cutter he got from me. He said it was just a 10 gauge plastic wad! He cut off everything from the top, leaving just the bottom of the wad and drilled a hole through the center. If you do this, you might have to thin the wad a bit depending on how thick it is. Using this (he said) you can shoot all day without fouling out. Quick, easy, and cheap!