Does anybody use Trail Boss for .45 ACP 230GR RN? What's the weight of the powder you use? I've been using 5.5 gr but I see IMR site is saying 4.5 gr for 15,000 CUP pressure. I am wondering if it's too high. This is for a 3 inch 1911 pistol. Would you guys think it's still safe to use 5.5 gr?