I have an H&R 223 that I want to download some of Speer's 45 grain 218 Bee Bullets. These are jacketed flat points. One load noted for the 218 Bee is 7.5 grains of 2400 (starting load). Understanding the higher volume of a 223 case, would the 7.5 grains of 2400 still be a good starting point? I am looking for a load under 2000 fps.