Not trying to call you out on this, but do you know for a fact? I always thought my 22-250 was smaller until you said it wasn't. I tried to find something on the net, and all I can find is a bad picture comparing the two casings, but I can't get it to upload.
Are you saying it has more powder or can get a larger grain bullet? I just would like to know because my next couple off rifles in my collection will be a 300 win mag and something between my 22-250 and my 270.