My pal who is a class three dealer and shoots lots of belt fed computer weapons has a lot of brass to reload for these guns. one of the crucial things he acquired to make existence a helluva lot easier is this slick laptop. that you could see in the video the way it works. It feeds situations and anneals them identical to it says. you set the velocity and the aspect does the rest off of propane. Very standard to use. Adjustable for any case.