Better to show a pic.
[Linked Image]

L to R
#1 New RP case
#2 Fired RP case (Ruger #3)
#3 Factory Remington cartridge
#4 Inert once fired ( fired in the Krag)
#5 Inert w/ new RP case

As you see both fired cases from two different rifles match the SAAMI spec for the 30-40. I have new Winchester cases and they measure the same as the Remingtons.

New Winchester cases are the same as the new Remington's

Difference from new case to fire formed cases.
Temp: 65 degrees

Chrony: Magneto Speed.
Rifle: Ruger #3 22" barrel

New 30-40 RP brass
CCI200 Primer
150 grain Sierra BT
COAL 3.08

Load 1- 2531fps
Load 2- 2598fps


Fired/FL Sized 30-40 RP brass
CCI200 Primer
150 grain Sierra BT
COAL 3.08

Load 1- 2686
Load 2- 2717



Why are the new 30-40 case not to SAAMI specs?

But the fired cases from the Ruger and Krag rifles are.



Last edited by Paulh; 11/27/14.
https://sites.google.com/site/8mmmauserreloading/home