Primer question ?

R

rebs

New member
when loading 223 in Lake City brass for an AR have you guys found a difference in accuracy between using CCI BR-4 or CCI SRP's ?
Is the BR-4 a magnum primer ?
 
They are not military sensitivity primers. The CCI #41 would be your choice for a magnum primer that meets that specification. The Federal GM205MAR would be your choice for a match standard ignition level primer that meets that specification.

See this post for the Large Rife version.
 
since I have 4000 of the BR-4, I could use them in a different rifle, are they a magnum primer ?
 
We seldom see the BR type primers in anyone's offering.

Sometimes CCI BR2. I never saw any difference but that could be because my shooting is not good enough to see a difference.

If its there it seems to be below 1/2 MOA.

Cost wise they are a lot higher so I don't buy them as for my shooting there was no advantage.
 
First, I am using a bolt gun in 223. I should have said so. I can see the difference in group size between Federal Match and standard small rifle primers.

Rebs I will gladly buy them if you are going to use something else.

David
 
"...are they a magnum primer?..." No. CCI says they're just made with greater QC.
I've never noticed any difference using a BR primer vs a regular primer out of my '03A4 though. You might if you're shooting actual Bench Rest rifles, but not in an AR or any other rifle.
 
What powder do you want to use them with? That will make a difference too. I used several thousand BR4s in LC brass with Varget when I was shooting Highpower. In an AR-15. There may have been a slight accuracy difference versus standard primers, but I couldn't give you hard numbers for proof. It gave me confidence and the ammo shot well, which is equally important.

I also liked Remington 7 1/2s. Used a couple thousand of those with Varget and RL15 as well. CCI400s and 450s were OK subs too. But stay away from the unplated Winchester Small Rifle primers. I pierced a lot of those at very mild load levels in my AR15. Replaced a couple of firing pins and a bolt due to them.

Sent from my SM-G930V using Tapatalk
 
rebs asked:
"...have you guys found a difference in accuracy between using CCI BR-4 or CCI SRP's ?"
Click to expand...

Almost all of my .223 shooting is done within 200 yards and at that distance I have never noticed any material difference between CCIs Small Rifle, Small Rifle Magnum or BR-4 primers.

I don't doubt that the extra care CCI takes in making the BR-4 primers uniform makes a difference at longer distances for shooters who are skilled enough to exploit the advantage, but I am not one of those shooters.
 
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