30 years ago, 18.5 gr of rx-7, 18.5 gr mp5744, and 22.5 gr of h/imr 4895 functioned well for thousands of rounds from my ruger mini-14 with a 50 gr gc bullet.
back then , i used lyman's alox lube, but today i'd use liquid alox, sizing and seating bullets using lee's push-thru sizer dies.
budman
ignorance if fixable...