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Centerfire
03-30-2011, 05:58 PM
Is there a listing of the hardness of the cup of Small Rifle Primers or any or all of the primer types published anywhere?
There seems to be a lot of reference from one primer to another in threads but not a listing like a powder chart.
Thanks,
Centerfire

David Halblom
03-30-2011, 08:14 PM
I have never seen a chart, but from my experience the toughest are CCI BR-4's.

David

Dennis Sorensen
03-30-2011, 08:39 PM
My experience has been Remington 7 & 1/2 primers to be the most resistant to 'piercing' or blanking... back in the early days of hot .17's they were the only primer to use...

zippy06
03-31-2011, 12:48 AM
read this.
http://www.jamescalhoon.com/primers_and_pressure.php

zippy06
03-31-2011, 12:50 AM
German Salazar has done some research. Look on 6mmBR.com.

German Salazar
03-31-2011, 01:04 AM
I've never looked specifically at cup hardness, but the Remington 7 1/2, the CCI BR4 and the Russian small rifle magnums are all fairly hard in my experience. I'm sure there are others, but this is simply a short list of some with which I have personal experience.

Centerfire
03-31-2011, 09:50 AM
Thanks for the information.
Centerfire

Vern
03-31-2011, 12:10 PM
How does the primer cup hardness affect the accuracy?
How does it affect the rifle so long as the rifle has an adequate firing pin spring?
How much does the difference really make in being able to shoot hotter loads?

German Salazar
03-31-2011, 09:50 PM
Primer cup hardness doesn't affect accuracy at all. Hopefully no one is trying to use a hard primer to permit an excessive load. Some are harder than others, but that shouldn't be the criteria for selecting a primer! The only exceptions are the Remington 6 1/2 and the Russian Small Rifle (non-magnum) which are actualy too soft for normal loads in most instances.

243winxb
04-01-2011, 10:09 AM
The Remington 6 1/2 primer should not be used in the 17, 222 ,223 Remington rounds. http://img.photobucket.com/albums/v474/Sport45/Remington.jpg

Centerfire
04-01-2011, 11:22 AM
German, Thank you for your reply. My question stems from the purchase of a RRA AR and comments on the web regarding the use of soft primers due to the possibility of slam fires from the inertial firing pin. I have some CCI BR4 primers I thought should work in this varmint type rifle. Just getting started.
243winxb, Thanks for the information. I bought a new Sierra manual to help in my new project. Still have not loaded for it.
Centerfire

Greg Culpepper
04-01-2011, 03:45 PM
CCI 41 primers are intended for AR's and other self loaders with floating firing pins. I think they are harder than BR4's.

Greg

Centerfire
04-01-2011, 04:06 PM
Thanks Greg, I looked up your info on the CCI web site and you are correct. They call them #41/5.56 Appreciated.
Centerfire

pdhntr
04-01-2011, 04:15 PM
German, Thank you for your reply. My question stems from the purchase of a RRA AR and comments on the web regarding the use of soft primers due to the possibility of slam fires from the inertial firing pin. I have some CCI BR4 primers I thought should work in this varmint type rifle. Just getting started.
243winxb, Thanks for the information. I bought a new Sierra manual to help in my new project. Still have not loaded for it.
Centerfire

For what it is worth...........I have shot easily 10K rounds through 4 different ARs and a buddy has likely shot 5K through several that he has owned. We both used the CCI BR-4 primer, and never had a slam fire. I know what I would do.

Jim

zippy06
04-05-2011, 01:19 AM
Thanks German.
Center fire.
I have some better info. now. For a better answer. I have owned 2 Colt AR-15s. Always loaded CCI SR on a Lee Turret. That was before the shortage. Never a slam fire. Have recently tried Wolf Magnum. In .223 Rem. and 6PPC. Good primers. Hard to seat. Tried hand primer tool. Ended up using Lee Press. All good.
Note only the 6PPC gets loaded HOT. But, with all the Custom stuff.
M1 Garand CCI #34. On an Old timers advice. And former owner. 10 bulls 200yd. I listen good.
Said he shot 5 Chicoms. with a Garand. One bullet Black tip. In Korea of course. I listened to that, too.
Said he used to bend carbines for the Officers. And tell them to go get a real man's gun.
He kept a collection of them on the back of his tank. "Better us, then them".

Centerfire
04-05-2011, 03:08 PM
I decided to do a little measuring of my primer pocket uniformers and present the information for review.
Comments,
PPC Sm Rifle uniformer .126" deep
PPC Sm Rifle uniformer .12455" deep
Std Sm Rifle uniformer .13185" deep
As you can see the Standard Sm Rifle uniformer is going to cut deeper than the PPC/BR uniformer.
Is there any specified depth of a Lapua Small Rifle primer pocket for
.220 R
.223
Centerfire