I have a yearning for a 30/223 and will use my Savage 110 223 as the action. I already have a rimmed version of the 300 BO based on a Martini action and use 357 mag shells. I purchased a 300 BO reamer some time back and to my mind it should be possible to run this reamer into the barrel an extra 10mm and end up with my version of the wanted cartridge, and load with my 300 BO dies. I intend to use one of the 1/14'' twist barrels I have. Can anyone tell me why this will or will not work. Regards Stephen