Considerable time and effort Required to keep the discs advancing. Not once did the disc feeder work when it should. The gun was lubricated and the pressure was increased. To move the discs forward I would have to fire the gun about 20-50 times without a stirrup the first time a day, and then after the disc was finally loaded I would have to manually insert the next disc. After that I had to unload the staples again and shoot them empty 2-5 times. Unfortunately I went through the return window and no longer use this gun. I'm tempted to just throw it in the trash so someone else doesn't have to suffer the same headache.