 The cartridge was designed in the early 1920s at a time when the only way to get a .375 Magnum was to have one built up on the long expensive Magnum Mauser action.The great advantage of the .35 Whelen was that this was a cartridge that could handle heavy bullets and yet could be used on short actions like 98 Mauser and the Springfield.Because .30/06 cases are cheap and plentiful and because good bullets like those made by Speer Inc. in 35 caliber are available, the 35 Whelen still retains considerable popularity.