Is the 6.5x61 Mauser close enough to the 256 Newton (6.5x62) that you can use trimmed Newton brass, Newton loading dies, and loading data?

I have a 256 Newton that appears to have the same ballistics. It has a 1/10 twist barrel so it is really designed for 120 to 129 gr bullets. It would be nice if Newton had used a faster twist barrel but I believe he was looking for speed which a lighter bullet provided.