I had barrel problems during break in so haven’t been able to work up loads yet. I think Gerry has the most experience and has some good loads. Look at the thread history here and the Nosler forum for some load info. Just about any belted magnum powder will work for the 6.8 Western heavies. I loaded up retumbo and magnum but haven’t shot yet. The new RS Grand is getting great velocity also. Just so you know the Sierra 175 gr TGK has a lower BC than the bullet Sierra makes for Browning. The 165 LRAB and the 170 EOL have excellent BC and are my focus at this point.