Okay, so now we have a second witness who says the 270 can be fired safely in a 5.7 x63 Neuber chamber. I have seen it chamber, not fire,that makes three, and we have a page from a cartridge collector site that lumps the 6.7x63 with the 6.5x63 showing a picture of a nine whatever by sixty three. ........whatever...
Generally speaking I find gun guys a nice bunch, but the industry itself can be a bit lacking in giving credit where credit is due. For instance, the 450 watts jack Lott plagiarism. If there ever was a fraction of difference between the two, there isn't now. If you order a reamer in either, you will get the same part number. The 416 rem George Hoffman issue, same thing. George had no sour grapes, neither did Watts, they were both humble men. My point is gentlemen, a Picasso is a Picasso and it seems the 270 was not always Winchester, and a little more honour in the trade would be nice