Try this bullet. It has never let me down. I use it over the correct load of IMR 4064. It has produced excellent accuracy even in 303s with groves to 318. For some reason this bullet is overlooked by a lot of people. Hornady Manufacturing Company :: Bullets :: Rifle :: Choose by Caliber :: .312 303 CAL :: 303 Cal .312 174 gr InterLock® RN

303 Cal .312 174 gr InterLock® RN