When I bought a short Remington 700 I had the bolt opened up to fit a .378 Weatherby. The 7mm barrel was chamber to fit a .378 Wea with its 45* shoulder pushed back to make a case 2 1/4" long with a 1/4" long neck. It held the same amount of powder as my 7-.300 Weatherby. I called it Short Fat Seven decades before short and fat was in.
So that's one thing you can do.
