I've done nothing special. I started with Master Po's Garand loads, and also searched the CMP forums for data for lighter weight bullets like the 125 Speer TNT. (I have not found any .30 cal. rifle that cannot shoot that bullet well, and recoil is mild.) I've used four powders to date: 3031, 4064, W748, and both brands of 4895. Bullet weights from 125 gr. to 150 grs. I had hangfires with W748, probably because of wrong primer or I was starting off too low on the powder weight. I've never gone back to testing with it. I've been meaning to try 168's HPBT's but haven't had the time, life got in the way. I use the standard gas plug too, no adjustable gas plug.