I'm using hornady . I.ve used hornady and adg brass and haven't had any clickers . Even with hornadys hot factoty loads blew primers but still could open bolt.
The man that told me said he pulled a bullet and weighed the powder. Compared it to rl 26 and they looked and weighed the same. He's a custom reloader around here, so I believe him. But you can't get rl 26 so i'm using h1000. I have a lot of it