Cci primers
- Thread starter BORGY76
- Start date
BR primers vs Match primers vs Regular primers
So, what's the difference between these three primers in small rifle. I read that the only difference is that the manufacturer slows down production for the match and BR primers to better ensure better consistency and conformity.
forum.accurateshooter.com
My understanding is cci 400 and br4 is the same br4 just has a higher quality control as far as checking anvils to make sure they’re in place. 450 is a magnum primer and would have a bit longer flash and possibly higher temperature than the 400 and yes the powder would determine whether you use 400 or 450. The 400 and br4 can be used interchangeably. I have seen people use 450 for a 400 load but you would want to start low on the powder charge and work up.
group therapy
Gold $$ Contributor
I dont know if its true or not but in the early 90's I called cci and ask them what the difference was between the br primers and the regular ones. the guy told me the br primers are made Tuesday through Thursday, not on Monday or Friday. 
Thanks, I was searching for something like this.
Bronsin
Silver $$ Contributor
That's exactly what I tested this evening to get the final piece of the puzzle, or so I thought, on loads for my 6PPC. As it turns out, the primer I did all my powder and seating depth tests ended up being about the best, which was the BR4's. CCI 450's did fairly well also. The happy surprise was how well the Unis Ginex primers did. Fed205M, Rem 7 1/2, and WSR all made blobs.
The part that threw it all for a curve was I had done all my testing with Berger 68gr FB, and had just enough of Bart's Originals and Ultra's to test them. With 40rds worth of fouling down the barrel, the Originals made everything else look silly! Guess I have a call to make tomorrow.
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jepp2
Gold $$ Contributor
The 400's are thinner (which results in more flow so they look softer) at 0.020" thick. Both the BR 4 and the 450's are thicker at 0.025" thick. The BR 4 primer are made by folks with more experience and they should be more consistent. The 400's are best used in lower pressure rounds similar to the Remington 6 1/2 primer. But as mentioned, try them and see what shoots best.
The 450's are a magnum primer and I often shoot them against my Remington 7 1/2's which are called a Benchrest primer or a magnum primer. Normally there is little difference in velocity. But one time the 450's showed over 100 fps higher velocity vs the Rem. That is why it is always smart to work you load up when you change anything.
When I was shooting the deer shown in my avatar I was using my 25-06. I had a round that didn't fire, so I ejected it and shot the next round. Brought it home and broke it down. It was primed with a CCI 200 primer. Nice hard strike by the firing pin. So I removed the primer and inspected it. No priming compound in it. Maybe it was made by less experienced operators? Since then, I check all my hunting primers for presence of priming compound before I prime my brass.
6.5 forever
Silver $$ Contributor
I use CCI 450 for all small rifle primer cases.
Longtrain
Gold $$ Contributor
I can attest to this fact. My 223 Remington 100 meter match loads, a mid load, flatten a bit, no firing pin cratering or other pressure signs.
But, superbly accurate and very low SD’s.
this may not be surprising, since your load development was done with them, and the other primers may have moved you slightly out of tune?
it might be you are only 1/3 of the way done with the comparison. a scary thought with today's component prices.
What'
What's the best way to check for priming compound?
Bronsin
Silver $$ Contributor
Yes it does look that way. 2 of the other 5 tested shot just as well, and the tune was built at 90* and the testing was done yesterday at 76*, so I would expect even the tuned load to fall off a little although it still shot well.
jepp2
Gold $$ Contributor
I just lay them out anvil side up. Look for the color of the compound. I wish I had taken a picture of the one with none. You can see the yellow material with the priming compound underneath on these. The one that wasn't filled, had neither. Just could see the underside of the dome.
400 standard small rifle .022/.023 cup thickness. 450 Mag , Mil spec #41, and BR 4, all .025 cup thickness, these 3 are close to the same..
With the most experienced primer employees working on the BR4 line, there to insure slightly more consistency, there is no difference, except for the 3 with the .025 cup thickness and slight variations in primer mixture, mag and standard primers. Remington 7 1/2 also have the thick .025 cup for high pressure loads, and AR floating firing pins, so they don't detonate when the bolt slams home...but I've never had that happen in the many thousands of AR rounds with the CCI 400...but use the #41 if you're concerned about it, as that's what they are designed for. I use any of the heavy cups .025 for high pressure loads in 5.56, 300 blkout, 300 ham'r, 224 valkyrie, 17 Rem, 6 dasher,and 308 SP brass...and in the lower pressure 6mm arc in the AR.
With the most experienced primer employees working on the BR4 line, there to insure slightly more consistency, there is no difference, except for the 3 with the .025 cup thickness and slight variations in primer mixture, mag and standard primers. Remington 7 1/2 also have the thick .025 cup for high pressure loads, and AR floating firing pins, so they don't detonate when the bolt slams home...but I've never had that happen in the many thousands of AR rounds with the CCI 400...but use the #41 if you're concerned about it, as that's what they are designed for. I use any of the heavy cups .025 for high pressure loads in 5.56, 300 blkout, 300 ham'r, 224 valkyrie, 17 Rem, 6 dasher,and 308 SP brass...and in the lower pressure 6mm arc in the AR.
I'll start checking mine now since I had the misfire I think I'll pull the bullet de-prime and check that primer. Thanks for the tip!
might not to have to deprime if you have a teslong scope. remove mirror and have a look down the flash hole?
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