Phil you would not want to use any of this in your inlines. As Mauser said, it is a priming powder. If you are shooting a PA Pellet it would not hurt to drop say 10 grains down first if your having ignition problems, but only if your having problems. Unlike the FFFg powders which can be shot in some of the rifles as a main charge, this stuff is different. Keep it cool and dry and you will have it for years to come. I have two pounds of it myself. Think how long I am going to have it around....