CCI 400 vs CCI#41

Hundy · August 6, 2013, 07:39 PM

New to reloading .223 or 5.56
I bought a box of 1000 CCI 400 (small rifle) because I cannot find CCI#41 anywhere. I thought I could use the #400 in place of the #41.
I am reloading for a M&P15T, 5.56 with a 1 in 8 twist.
I would prefer to use the CCI#41, but I was curious if anyone uses CCI#400.
As of right now, I have a box of Nosler 22 cal 55grain .224 Spitzer. That is all I am able to find at the moment.
Any advice, would be greatly appreciated.

Thank you

Jay

243winxb · August 6, 2013, 08:00 PM

The CCI400 primers i have, seem to flow back into the hole around the firing pin sooner than Rem 7 1/2 primers, using a bolt action. I learned not to use the Rem 6 1/2 as they are only good to 40,000 psi. They (6 1/2) were a problem in my Colt auto. Never had a slam fire.

Swampman1 · August 6, 2013, 08:01 PM

I've been using the CCI 400 when reloading Remington .223 55 gr FMJ-BT with IMR 4198 and they work great.

rebs · August 7, 2013, 05:07 AM

CCI #400 is all I use for 223 in my AR, never had a problem.

9miller · August 7, 2013, 08:31 AM

I also use the cci 400s for ar use, I also got a couple packs of 6.5 remington primers by mistake, used then for minimun loads for plinking, no issues but I wont do that again for the sake of piece of mind.

mohr308 · August 7, 2013, 12:06 PM

I use the 400's also but prefer the 41's, no problems with either. The 41's are made to reduce the risk of a slam fire in AR rifles. The AR has a free floating firing pin, so if you pull out the first round that's gets loaded (unfired) you will notice an imprint of the firing pin on the primer. When your BCG slams forward, the firing pin will hit the primer! That's why it's so important to always point your muzzle towards the ground when loading the AR. An out of battery fired round may damage your rifle or just cause some headaches and money.

4runnerman · August 7, 2013, 12:58 PM

400's are a standard Primer,41's are more down the line of a magnum primer. Do not use 400's in a hot load,They can not handle the charge and you will be cleaning pieces of primer out of your rifle ( this I know from personnel expirence). Cup thickness is different. Also as stated here 41's are to help with slamfires in Ar's.

stubbicatt · August 7, 2013, 04:32 PM

Actually, I read somewhere that I remember as credible, in the last week, that the differences between the CCI 41 and standard primers is the height of the anvil, the cup is the same.

In any event, I have run standard CCI primers in AR15 space gun back in the 90s, and it shot great, no slamfires at all.

The one I used to run that gave me concern was the Federal 205M I think it was. If you single loaded for prone slowfire or standing, the firing pin would always dent the primer cup. Used to make me really nervous.

iraiam · August 7, 2013, 06:55 PM

According to the CCI website, the #41 primer uses the same data as the 450 (small rifle magnum).

I use either #41 or 450 primers, but I have used some 400 primers lately in 5.56 for target ammo.

jepp2 · August 7, 2013, 07:43 PM

The Rem 7 1/2 and the CCI 41 are both magnum primers and will better ignite the hard to light ball powders.

4runnerman · August 7, 2013, 08:38 PM

Actually, I read somewhere that I remember as credible, in the last week, that the differences between the CCI 41 and standard primers is the height of the anvil, the cup is the same.

Stubbycat--CCI-400- cup thickness- .020
CCI-41,CCIBR4 and CCI 450,s cup thickness .025

stubbicatt · August 8, 2013, 07:51 AM

Well there you have it! Thanks for clearing that up 4runnerman.

4runnerman · August 8, 2013, 11:46 AM

Not a problem Stubbycat. I know this because behind the scene here I Have been in contact with Bart and Brian on this issue. In fact at this time,My Br is out of commission due to this issue. I have a new Bolt head on order. I have learned my lesson. This primer shortage has got to enddddddd.

. Max Loads--Need heavy duty primers. Tried CCI-41's ( same as CCI-450's ). Accuracy dropped. No blown primers but the loss in accuracy was not worth it.

August 6, 2013, 07:39 PM	#1
Hundy Senior Member Join Date: February 23, 2013 Posts: 111	CCI 400 vs CCI#41 New to reloading .223 or 5.56 I bought a box of 1000 CCI 400 (small rifle) because I cannot find CCI#41 anywhere. I thought I could use the #400 in place of the #41. I am reloading for a M&P15T, 5.56 with a 1 in 8 twist. I would prefer to use the CCI#41, but I was curious if anyone uses CCI#400. As of right now, I have a box of Nosler 22 cal 55grain .224 Spitzer. That is all I am able to find at the moment. Any advice, would be greatly appreciated. Thank you Jay

August 6, 2013, 08:00 PM	#2
243winxb Senior Member Join Date: July 26, 2011 Location: USA Posts: 1,730	The CCI400 primers i have, seem to flow back into the hole around the firing pin sooner than Rem 7 1/2 primers, using a bolt action. I learned not to use the Rem 6 1/2 as they are only good to 40,000 psi. They (6 1/2) were a problem in my Colt auto. Never had a slam fire. Last edited by 243winxb; August 6, 2013 at 08:16 PM.

August 7, 2013, 12:06 PM	#6
mohr308 Senior Member Join Date: January 15, 2012 Location: Western New York Posts: 466	I use the 400's also but prefer the 41's, no problems with either. The 41's are made to reduce the risk of a slam fire in AR rifles. The AR has a free floating firing pin, so if you pull out the first round that's gets loaded (unfired) you will notice an imprint of the firing pin on the primer. When your BCG slams forward, the firing pin will hit the primer! That's why it's so important to always point your muzzle towards the ground when loading the AR. An out of battery fired round may damage your rifle or just cause some headaches and money. __________________ Lock and load, the zombies (democrats) are coming (to take your guns)!

August 7, 2013, 12:58 PM	#7
4runnerman Senior Member Join Date: January 16, 2010 Location: Minnesota Posts: 3,577	400's are a standard Primer,41's are more down the line of a magnum primer. Do not use 400's in a hot load,They can not handle the charge and you will be cleaning pieces of primer out of your rifle ( this I know from personnel expirence). Cup thickness is different. Also as stated here 41's are to help with slamfires in Ar's. __________________ NRA Certified RSO NwCP- Performance Isn't Optional

August 7, 2013, 06:55 PM	#9
iraiam Senior Member Join Date: September 6, 2012 Location: Lakewood, CO Posts: 1,057	According to the CCI website, the #41 primer uses the same data as the 450 (small rifle magnum). I use either #41 or 450 primers, but I have used some 400 primers lately in 5.56 for target ammo. __________________ NRA Lifetime Member Since 1999 "I ask, sir, what is the militia? It is the whole people except for a few public officials." George Mason

August 6, 2013, 08:01 PM	#3
Swampman1 Senior Member Join Date: February 17, 2013 Location: South Louisiana Posts: 432	I've been using the CCI 400 when reloading Remington .223 55 gr FMJ-BT with IMR 4198 and they work great.

August 7, 2013, 05:07 AM	#4
rebs Senior Member Join Date: January 10, 2012 Posts: 3,881	CCI #400 is all I use for 223 in my AR, never had a problem.

August 7, 2013, 08:31 AM	#5
9miller Senior Member Join Date: January 11, 2012 Location: Myrtle Beach, SC Posts: 169	I also use the cci 400s for ar use, I also got a couple packs of 6.5 remington primers by mistake, used then for minimun loads for plinking, no issues but I wont do that again for the sake of piece of mind.

August 7, 2013, 04:32 PM	#8
stubbicatt Senior Member Join Date: September 15, 2007 Posts: 1,707	Actually, I read somewhere that I remember as credible, in the last week, that the differences between the CCI 41 and standard primers is the height of the anvil, the cup is the same. In any event, I have run standard CCI primers in AR15 space gun back in the 90s, and it shot great, no slamfires at all. The one I used to run that gave me concern was the Federal 205M I think it was. If you single loaded for prone slowfire or standing, the firing pin would always dent the primer cup. Used to make me really nervous.

August 7, 2013, 07:43 PM	#10
jepp2 Senior Member Join Date: December 24, 2008 Location: Loveland, CO Posts: 1,476	The Rem 7 1/2 and the CCI 41 are both magnum primers and will better ignite the hard to light ball powders. __________________ NRA Benefactor Life member

August 7, 2013, 08:38 PM	#11
4runnerman Senior Member Join Date: January 16, 2010 Location: Minnesota Posts: 3,577	Actually, I read somewhere that I remember as credible, in the last week, that the differences between the CCI 41 and standard primers is the height of the anvil, the cup is the same. Stubbycat--CCI-400- cup thickness- .020 CCI-41,CCIBR4 and CCI 450,s cup thickness .025 __________________ NRA Certified RSO NwCP- Performance Isn't Optional

August 8, 2013, 07:51 AM	#12
stubbicatt Senior Member Join Date: September 15, 2007 Posts: 1,707	Well there you have it! Thanks for clearing that up 4runnerman.

August 8, 2013, 11:46 AM	#13
4runnerman Senior Member Join Date: January 16, 2010 Location: Minnesota Posts: 3,577	Not a problem Stubbycat. I know this because behind the scene here I Have been in contact with Bart and Brian on this issue. In fact at this time,My Br is out of commission due to this issue. I have a new Bolt head on order. I have learned my lesson. This primer shortage has got to enddddddd.. Max Loads--Need heavy duty primers. Tried CCI-41's ( same as CCI-450's ). Accuracy dropped. No blown primers but the loss in accuracy was not worth it. __________________ NRA Certified RSO NwCP- Performance Isn't Optional

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