Primer question ?

rebs · January 3, 2019, 08:57 AM

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 ?

David R · January 3, 2019, 10:34 AM

I have always had better luck with BR or match primers if I can find them.

David

rebs · January 3, 2019, 10:50 AM

I bought 4 boxes of CCI BR-4 from a guy at our club for $15.00 per box of 1000

**Unclenick** · January 3, 2019, 11:13 AM

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.

rebs · January 3, 2019, 11:29 AM

since I have 4000 of the BR-4, I could use them in a different rifle, are they a magnum primer ?

RC20 · January 3, 2019, 12:36 PM

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.

David R · January 3, 2019, 12:54 PM

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

T. O'Heir · January 3, 2019, 01:43 PM

"...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.

P-990 · January 3, 2019, 01:43 PM

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

hdwhit · January 3, 2019, 06:02 PM

Quote:

rebs asked:
"...have you guys found a difference in accuracy between using CCI BR-4 or CCI SRP's ?"

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.

January 3, 2019, 08:57 AM	#1
rebs Senior Member Join Date: January 10, 2012 Posts: 3,881	Primer question ? 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 ?

January 3, 2019, 12:36 PM	#6
RC20 Senior Member Join Date: April 10, 2008 Location: Alaska Posts: 7,014	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. __________________ Science and Facts are True whether you believe it or not

January 3, 2019, 01:43 PM	#8
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	"...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. __________________ Spelling and grammar count!

January 3, 2019, 10:34 AM	#2
David R Senior Member Join Date: January 2, 2015 Location: The swamps of WNY Posts: 753	I have always had better luck with BR or match primers if I can find them. David

January 3, 2019, 10:50 AM	#3
rebs Senior Member Join Date: January 10, 2012 Posts: 3,881	I bought 4 boxes of CCI BR-4 from a guy at our club for $15.00 per box of 1000

January 3, 2019, 11:13 AM	#4
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	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. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

January 3, 2019, 11:29 AM	#5
rebs Senior Member Join Date: January 10, 2012 Posts: 3,881	since I have 4000 of the BR-4, I could use them in a different rifle, are they a magnum primer ?

January 3, 2019, 12:54 PM	#7
David R Senior Member Join Date: January 2, 2015 Location: The swamps of WNY Posts: 753	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

January 3, 2019, 01:43 PM	#9
P-990 Senior Member Join Date: May 2, 2002 Location: Only1/2WayThere Posts: 1,316	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