Anybody loading any IMR4831 IN YOUR 300 ? I'am shooting a 24"barrel.I know i'am giving up alot of fps with the short barrel.Loading 180gr round nose.If you are useing 4831 hows it working for you ? My one book says max is 81.8 gr then another book is saying max at 76 gr. I know that i have to work up to max. thinking of starting around 74gr that would put me at about2900 fps.