Hey Guys I have some questions? I am reviving My 450 Ackley Magnum rifle, I came up with a stock. Now I am ready to reload I have 200, 500 gr Hornady's,soft and FMJ about 40, 350 grainers. I want to load some light loads 12 to 15 hundred FPS. I am short on powders I have Imr 4198 , H4895, and...