Hello I have just started reloading and was looking for some help. I am looking to load some practice loads 7/8 of an ounce. I was wondering how many grains of herco I should use to achieve around 1145 fps. I am Using Remington Sts Hulls, Cheddite 209 primer, Claybuster AA12L wad. I have MEC 20,22,24,30, and 32 bushings. Any help is appreciated!