CCI Brench Rest and Standard SR Primers


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Historian
December 19, 2009, 03:47 PM
Can someone tell me the difference between CCI Brench Rest SR primers and their standard SR primers? Does one have an advantage over the other?

Historian

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rcmodel
December 19, 2009, 03:51 PM
Benchrest primers are supposedly held to higher manufacturing standards / tolerances then normal primers.

They are intended to provide more consistently uniform ignition from shot to shot for better accuracy.
And they probably do.

rc

Historian
December 19, 2009, 03:58 PM
Thanks RC. I just picked up 1K by mistake. Glad I didn't goof up. I knew I could count on you to have the answer.

Historian

R.W.Dale
December 19, 2009, 04:36 PM
I've used both in my bench gun and to be honest I've never been able to tell a diffrence in accuracy

JimKirk
December 19, 2009, 04:37 PM
BR primers are said to have thicker cup material and are safe to us in AR type gun with out fear of Slam fires. I have not measured the thickness, but it seem to be the consensus. I am using CCI BR in my AR right now because that is all I could find at the time. Seems primers are getting more plentiful. Powder Valley has CCI # 41 in stock just a few minutes ago, web site may not be up to date

Jimmy K

Do a google search on primer cup thickness, you'll find several pieces about primer cup thickness. Of the measurements that were tested the BR came up thicker by .002. Like I said I did not do the test, only read about them. Add a half cup of salt and ....

rcmodel
December 19, 2009, 04:50 PM
By all accounts, CCI uses the same .025" primer cup thickness on the standard & BR primers it makes.

As for AR's and standard primers and perforated cups?
That is not a concern with any standard SR primer and the AR-15.

What is a concern is softer or more sensitive primers that may cause a slam-fire in a semi-auto rifle.

CCI makes mil-spec #34 LR and #41 SR primers that are harder & less sensitive then standard or BR primers.

rc

45ACPUSER
December 19, 2009, 06:40 PM
Go check this sit out and scroll down......
http://www.njhighpower.com/

EddieNFL
December 19, 2009, 06:59 PM
Scrolled down, but didn't see anything primer related.

Black_Talon
December 19, 2009, 09:58 PM
Scrolled down, but didn't see anything primer related.

Try this URL, there's a "Primer Cup Dimensions" chart a bit down the page:

http://www.njhighpower.com/cart_tech.htm

Strongbad
December 20, 2009, 02:35 PM
The thicker cups are used on the CCI mil-spec primers. The cups on the standard primers, BR or not are the same. Per CCI they basically do a production run with their most consistent operators on the most consistent machines and those are the BR primers.

P-32
December 20, 2009, 05:16 PM
I like the Remington 7 1/2's but see no real difference between those and the CCI BR primers.

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