Using CCI 34 Military primers in 338 Lapua

[Harwood]

I was recently able to acquire some of the CCI 34 Military Large Rifle primers, and had an old manual that indicated they were appropriate as a magnum primer.

Naturally I needed to put that to the test. I used an known-good load in my 338 Lapua, 90+gr of VV24N41 and only changed the primers. I did 25 CCI 34 and 25 Fed 215M, and shot them at 7C, which was a boon while waiting for the poor rifle to cool off!

There were no mis or hangfires on the CCIs, and the SD is a little higher, but not unusably so. Accuracy at 100m was not significantly different, both agging around 0.7MOA .

While YMMV, I think that the CCI 34s worked quite well as a magnum primer.

 

[VICIOUS]

I have read that the CCI 34 primers were different only in the fact that the anvil of the primer was a bit farther away from the cup so in firearms with floating fireing pins would not set off the round when the bolt was closed.

 

[TedNugent]

Harder material is what I read, harder to puncture, again for safety in a semi prone to firing pin problems.

 

[troutflyfisher1]

The data shows that the bullet velocity is statistically the same (no difference). Good find on the primer.

 

[armybuck041]

I bought a couple thousand of these a while back. Am about to add a .300WM to the fleet. Glad to hear these will work for that application.