I searched through the archives for you and could not come up with anything.....I guess if we dont get any replies we will have to go by the rule of thumb with the 06 casings guns, and try the 4350 and 4831 powders. I think we will probably get a "workable" load out of 4350. I would also like to see if anyone who has reloaded for this caliber would post their COL. We have alot of options that we havent tried yet, so dont get discouraged because one load bullet combination hasnt worked, we'll get you shootin by summer!!!