CCI Primers

[Brux]

Bought a brick of there regular large rifle primers yesterday to load up some new Hornady 6.5 creed brass.Some seated firm and some seated loose.Measured primer pockets and they were good so I then measured some primers and they varied from 209.5 to 211,Theres my problem.Has anybody else seen this?

 

[Brux]

Could it be a bad batch?

 

[ChrisGarrett]

So you're getting a spread of .0015". That's about HALF the thickness of a typical piece of printer paper, so not much. I'd be more inclined to believe that it's the primer pockets, or a combination of the two.

Chris

 

[.50 Cal Cow]

Had same occurrence on some BR2's in new 308 Lapua brass with some seating easier than others. Never actually measured any though but all shot fine.

 

[8AteEight]

Had the same mess using Winchester primers in star line brass for the 10mm. It was bad enough that it jammed up the press and wrinkled some primers.

-888-.

 

[Natty Bumpo]

I sometimes have issues loading CCI small rifle primers in SSA 6.8 brass. Seems primer pockets are tight with the SSA brass. Don't have that issue with any other brass I use CCI small rifle primers in.

 

[Brux]

Shot these primers today and had 5 misfires out of 33 rnds.This gun has never misfired and only has 120 rnds down the tube.None of my other guns have ever misfired,but I have never used CCI primers either.

 

[JMGlasgow]

In my experience, CCI seem to have harder cups than other brands.

 

[aur0ra145]

I shoot CCI Large Rifle No.200 out of my Garand. I've used probably 1500 and never had a misfire.

 

[Brux]

So what would you suggest?Shot out of a Savage 12 LRP 6.5 creed.

 

[308Gunner]

I have loaded and fired several thousand CCI BR2s without a misfire, your gun may not be hitting the primer hard enough. Just a thought

 

[Brux]

So if this is the case can it be fixed or do I need to change primers?I usually shoot Fed's but thought I would try some CCJ.

 

[mtrmn]

CCI primers are all I've ever used and can't remember a bad one in 30 yrs. Never measured any though. I've read here and elsewhere that Federals are pretty much the softest, so if your gun does fine with them that would lead me to suspect a weak hammer spring or something.

 

[Pinecone]

I have used mainly CCI for many years. Never had a bad one. Even those that got slightly scrunched in seating (plinking ammo) go bang.

I agree with the others, if your rifle shoots Federal fine, but not CCI, the firing pin strike is probably light.

 

[cav has been]

Inconsistant primer seating depth with the CCI's ?

 

[ArmyJerry]

Here is some primer size data, dont know how up to date it is.

NJ Hipower Rifle

 

[Dan Newberry]

Shot these primers today and had 5 misfires out of 33 rnds.This gun has never misfired and only has 120 rnds down the tube.None of my other guns have ever misfired,but I have never used CCI primers either.

Measure the thickness of those that didn't fire. Odds are that they're .005" shallow... they should be .125", and they'll probably be .120" or even .119"...

I've been reporting this for nearly a year now, but it's largely been falling on deaf ears. It's a QC problem with the primers, for sure. If I had to make ammo that my life might depend on, I'd be strongly inclined to measure the primers to be sure they were made to spec

We recently found the same shallow cup issue with Winchester primers in factory Hornady ammo.

Dan

 

[Brux]

Thanks,Dan I will do that and report back.Already took them out of the cases and did not see and that were damaged do to seating them incorrectly.

 

[mattwashington]

Measure the thickness of those that didn't fire. Odds are that they're .005" shallow... they should be .125", and they'll probably be .120" or even .119"...

I've been reporting this for nearly a year now, but it's largely been falling on deaf ears. It's a QC problem with the primers, for sure. If I had to make ammo that my life might depend on, I'd be strongly inclined to measure the primers to be sure they were made to spec

We recently found the same shallow cup issue with Winchester primers in factory Hornady ammo.

Dan

deja vu

 

[Pinecone]

If you seat to the bottom of the pocket, does this matter?

If you prime to a given depth, I could see this being a big deal.

 

[Raven0369]

I have been using CCI primers for 30 years and never had a miss fire. You may have contaminated the primers.
The more you play with them the more likely you will get them contaminated and they will miss fire.
I have never found weighing or measuring a primer to improve performance for me and most my loads for rifles are 1/4 MOA or less.
I have had better luck just changing components for the load and powder charge amount .1g at a time + or - to get the best groups.