Shooting Chrony Gamma Master Chronograph with Ballistic Chrony Printer and Free Purchasecorner Microfiber Cleaning Cloth Ballistic Chrony Printer. (See Ballistic Chrony Printer) Will also print Timer-Data 500 shot memory (divided into 50 numbered strings of 2 to 10 shots each) Memory for 500 individual Timer Read-Outs Timer Button TheGamma(at all times) measures and stores not only shot velocities but also time-elapsed between shots, including total time. To make theTimer-Datavisible, press theTimer Button. When inTimer-Modethe Chrony will also measure velocities at a rate of up to 1800 rounds/minute as well as the time elapsed between shots.