You might try CFE223.I loaded some in my 338-06 and it was only 5fps slower than Big Game with the same load.Groups were about the same too
I have shot both powders in my 338-06AI, and CFE223 (with magnum primers) has performed as well as BG. I use CFE223 now because I've got 8 lbs of it and only < 3 lbs of BG. Plus, it's theoretically supposed to cut down on copper fouling--we'll see.
