Nitrox,

The text you quoted above is talking about p-14 and p-17's. These are "enfield" actions. The springfield was an entirely different thing. It was more or less a copy of the Mauser with minor changes.

I'm not sure it's possible to put a rimmed cartridge the size of the 303 in a springfield. Maybe there was some confusion because the original cartridge that came out in the springfiled was not the .30-06 but the .30-03. It was basically the same as the 30-06. In fact the differences are very small. So perhaps there was some confusion with the 30-03 name.

Bill