If head stamp is important to you then the '06 case necked to .338 is great.
If performance is important to you take a look at the 338 RCM.
My 22" barreled one sends 225 Accubonds @ 2,750 with a dose of 61.0 grains of RL16.
It's a 338 Improved in a shorter all around package.
4 rounds in the belly too.
Mainer in AK has figured out how to do it.
"I figured a way to fit 4 rounds down in the 338 rcm:
The rifle would fit 4 rounds in the mag, but bolt wouldnt close, due to the ejector needing space to articulate down into the magazine when the bolt is closed.
Since the case has very little taper, the magazine follower has very little taper. I simply flipped the follower around. Now, the ejector side was left open so that you could close the bolt. It was tight. I had to file a bit off the bottom of the follower and those raised portions of the inside of the floor plate.
I also had to flush-file off the excessive material of the trigger guard that holds the magazine box in place, so that the follower could articulate downward in the magazine without catching up.
Bam.......4 rounds down."
