primers

[rogn]

I see primers are getting a bit dicey to buy. The SRPs BR4 and CCi 450 seem to be the 1st choice currently. I was wondering whether the CCI #41 mil spec 5.56 primer is comparable to the less available choices. I have a brick of them and was wondering whether anyone has used them for the BR role.

 

[willbas]

 

[rogn]

Interesting, thank you.

 

[JEFFPPC]

I see primers are getting a bit dicey to buy. The SRPs BR4 and CCi 450 seem to be the 1st choice currently. I was wondering whether the CCI #41 mil spec 5.56 primer is comparable to the less available choices. I have a brick of them and was wondering whether anyone has used them for the BR role.

Only way you will ever know in your set up is if you try them.

 

[dcali]

I see primers are getting a bit dicey to buy. The SRPs BR4 and CCi 450 seem to be the 1st choice currently. I was wondering whether the CCI #41 mil spec 5.56 primer is comparable to the less available choices. I have a brick of them and was wondering whether anyone has used them for the BR role.

It's my understanding that the 41 is a 450 with a thicker cup (someone correct me if I'm wrong). The thicker cup may impact ignition consistency, but maybe for the better. Worth a shot to try them.

 

[Longtrain]

I’ve used both the #41 and #34, just in XTC loadings, they all went bang. Worked fine, you may need to run some over a chronograph to see how they affect SD and ES.

 

[Yote Hunter]

It's my understanding that the 41 is a 450 with a thicker cup (someone correct me if I'm wrong). The thicker cup may impact ignition consistency, but maybe for the better. Worth a shot to try them.

I was told the same thing also.

 

[riflewoman]

A brief description of the primers can be found here.

https://www.sksboards.com/smf/index.php?topic=56422.0

according to this description, the 41 primer has a slight increase in distance between the mix pellet and the anvil. I believe this is accomplished by putting a slight dimple in the mix when they press in the foil but I have no data to back it up. The 41 primer is “qualified” to be used in assemloping military ammo. It is a “magnum” strength primer.

 

[dellet]

#41's will take a much harder impact before ignition. To the point where in something like a Handi-rifle it might take a couple hits before firing even with a rimmed case.

I have also had trouble in a Model 7 where the shoulder will set back before the primer pops.

Seems like a poor choice for extreme accuracy.

 

[D-4297]

A brief description of the primers can be found here.

https://www.sksboards.com/smf/index.php?topic=56422.0

according to this description, the 41 primer has a slight increase in distance between the mix pellet and the anvil. I believe this is accomplished by putting a slight dimple in the mix when they press in the foil but I have no data to back it up. The 41 primer is “qualified” to be used in assemloping military ammo. It is a “magnum” strength primer.

Thank you for posting that info . Good info on the subject , and the poster did a good job with presenting the data & info .

 

[David Eberts]

About 2 years ago I bought a Savage model 12 , 26" bull barrel in .223. Factory loads were a very tight fit When I started reloading I set the correct case length and bullet seat depth through careful analyses to fit my gun. Note- different bullet makes and weights differ in their profiles quite a bit. Example- a Nosler 50 gr ballistic tip needs to be seated a little deeper than a Hornady 50 gr varmint tip. At least for my gun anyway. So lets get to the topic at hand here. PRIMERS- 50 + years ago I was reloading 30-06 , 41mag , 45 acp. I used magnum type primers only because I don't care for failures when i was hunting. So reloading the .223 I let my guard down and bought the CCI 400 small rifle primer. First 5 shots the firing pin punched a hole in the primer, Not good. Did research on primers and settled on the CCI # 450 primer. Problem solved. 1,000 + rounds , no holes ,no problems , perfect ignition every time. CCI info says the primer cup of the # 450 is made of thicker material. Don't know what the internal science of the primer is and don't care. It works great and that's all that matters to me. Fair winds and following seas.