That means if you are cloaked and start charging you will uncloak whether you've fired or not. The Infiltrator's Tactical Cloak power registers a shot fired when you start charging the Graal, rather than when you actually fire off a shot.It takes time to get used to this if you have been using the classic shotguns. It makes shooting moving targets a bit tricky, but this can be remedied by leading your shots. Because the Graal shoots slower, but heavier flechettes, there is a noticeable delay from shooting to impacting your target.The Graal only expends one shot, regardless if it was charged or not. A safer way to use charged shots is from standing cover behind walls/pillars you can simply run behind and pop out from. The Graal can be charged for up to double damage, but this is risky to do from sticky cover on higher difficulties.