I understand this thread goes back a few years: I wonder how a 30/06 case can be a parent case for the 280 Remington? The 280 Remington is .051" longer from the shoulder to the case head, I understand there are those that think that is nothing but a small step in the case forming process, but, when fired the case must expand to fill the chamber when forming the case body. Again, I know reloaders believe the shoulder on the 30/06 moves forward, I know that is impossible, again the shoulder on the 30/06 case does not move, the 280 Remington shoulder when formed is a new shoulder that was formed from the part of the shoulder of the 30/06 and part of the shoulder of the 30/06 became part of the case body.
And then there is that argument about longer/shorter: When fired the neck of the case was pulled back meaning the case has no choice but to shorten from the end of the neck to the case head. And then there is that 'longer part' that reloaders do not understand, when measured from the new shoulder to the case head the case increased in length .051".
Keeping up? Before forming and firing the the reloader is already .041" behind/short; after the case forms the new shoulder and adds to the length of the case from the case head to the shoulder the reloader looses another .030" in case length. I am not the fan of short cases, I want my cases to cover the chamber.
You can beat this horse as long as you want guffey but, it aint going to get any deader than you have already "kilt" it!
To start with, the 270 case is the same length as the 280 Remington case, I believe the 270 would be a better choice but the firmed and fired case is not going to cover the chamber.
F. Guffey