Is my Type 2 chamber not Type 2?

[NugginFutz]

Thanks for posting these pics!
Very informative. It's hard to predict where a case will stretch when it is fired in an oversize chamber. Yours is what I would guess to be the less dangerous result?

FWI understand, the firing pin usually pushes the case forward in the chamber until the shoulder hits, so when the case expands the main body is held by the chamber walls and the base has to stretch backward to take up the slack. This can lead to a catastrophic case head separation.

Johnny's Reloading Bench switched out a Saturn barrel for a Faxon and the fired brass length difference was .010". The sized reloads made for the Saturn would not even chamber in the Faxon. He rants about it in this video at about the 15 minute mark: https://www.youtube.com/watch?v=1Ecjvr-o...jTRb-JJmto
The funny thing to me is that his Saturn brass looks to be within spec at 1.224" while the Faxon brass measures a little short at 1.214".

It was for this reason that I kept my fired brass separated. The BHW brass is .004 longer than the Larue. Not as severe as the .010" difference between JRB's two barrels, but enough to make me notice.

With mixed brass, I would have to choose a compromise on the shoulder setback. If I were to setup the dies to bump the shoulders .003" for the BHW, the brass would be on the long side in the Larue. On the other hand, setting up the dies to bump the shoulders for the Larue would tend to overwork the brass fired in the BHW.

The working solution has been to setup the sizing die for each rifle's fired brass, and keep the brass separated throughout the life cycle of the ammunition.

However - with the new found abundance of cheap loaded ammunition with quality brass, the point may be moot. Brass life may have become a little less critical, given the introduction of the American Gunner ammunition.