On page 269 of Keith's "Rifles For Large Game" there is a picture of a very young and slender Elmer with "a record antelope killed at 450 yards with the .280 DuBiel Magnum...." There are numerous references to the .285 OKH in this book, but none I could find to the .280 OKH. The DuBiel rifle appears to be a heavy barrelled Mauser in a nicely checkered stock, fitted with an 8X Lyman Targetspot externally adjusted target scope.