After buying a Heym Double rifle in 375 H&H I didn't want two guns of the same caliber so after making inquires for ideas on caliber it came down to 9.3x74r and a 338/74r Keith everyone has a 9.3 so I ordered custom dies and I have been offered a reamer to use I am going the 338/74Keith path on one of the reloading sites I have found loads that equal 338 win mag loads and the ability to easily found bullets. And it has a very cool factor it was built for Elmer Keith in early 1970 and is shown in the Guns and Ammo 1972 annual listing 300 gr loads at over 2500 fps. and almost four inches long.