Summarize the story the author tells of a gun hobbyist who inadvertently starts a brush fire in the Southern California mountains.

The author shares a story involving gun hobbyists who go into the mountains of Southern California to shoot their old-fashioned firearms. One gun hobbyist decides to put tissue as wadding in his muzzleloader. This turns out to be a serious mistake. He shoots his gun, and this starts a brush fire which ends up burning more than three thousand acres of chaparral.