That was my first try with it, according to hodgdon the max charge for that bullet weight is 45 grains. I didn't see any pressure signs at 44.5 so I'll probably work up to that and see how it does. I originally ordered the pulled 190gr smk bullets to use in my 300 black for subsonic loads but there doing well enough in the .308 I may just save them for it. I'm waiting on 208 grain Amax to come in to try tooI'm going to write down that data right now. I would have never thought of CFE 223 for that!