This is my first time posting on this site even though I have read and got much info from everyone. I want to load 223 using nosler custom comp. bullets with imr 4198. IMR does not list a 52 gr. bullet in their data book and sierra load manual states19.6 to 22.4 grs. I am try to load this for competition shooting with my Rem 700. If anyone can help me out with this I would appreciat it.