Armory Sponsor
Posted: 10/31/2008 2:27:54 PM EDT
|
I have lots of PPU brass. Its all processed & primed. The CCI 400 primers sit just slightly high... you can feel it with you finger and JUST see it. I've been putting off loading it because of this. I have lots of Rem, LC, & WCC that I've been using. I don't want any slam fires.
Today I tried about a dozen or so primed empty rounds by chambering them and letting the bolt fly. NONE detonated, they just have the slight mark that is normal from the firing pin. I'm thinking they are fine. Does this sound like a reasonable test? |
|
Rifle Primer Dimension Chart
Cup Cup Cup Thickness Diameter Height Small Rifle CCI 400 .020" .1753" .109" 450 .025" .1750" .113" BR4 .025" .1755" .109" Federal 200 .019" .1757" .111" 205M .0225" .1744" .1075" Remington 6 1/2 .020" .1753" .109" 7 1/2 .025" .1752" .110" Winchester SR .021" .1750" .109" |
|
You will most likely be ok.
CCI makes their primers with a harder cup than most other manufacturers. With that said, are you 100% positive they are seated completely? If they are not you may encounter a misfire as the primer will move forward and not go off. If they are you can deprime them and use a primer pocket uniformer, I use a Lyman handheld tool from midway, and then reseat them. Or you can just load up some plinking rounds and go have fun. Be safe! ETA: http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=612992&t=11082005 |
| +1 on uniforming. Had the same problem with BH brass which had primer pockets at min SAMMI and CCI primers at max SAMMI. Uniforming significantly helped. I now primer pocket uniform for every loading. Doesn't remove hardly any brass but does clean up the pocket for better seating. |
|
I guess I will invest in a "uniformer" when these are ready to re-reload. They are already primed... 600 or so.
As far as the primers being seated... they are completely. All the pockets were swagged & then cleaned. I use an RCBS hand primer for ALL my priming. I took a few of the primed cases and tried to seat the primers the rest of the way with my press mounted swagger... it just crushed them... they are all the way seated, they just sit ever so slightly high. I honestly was "reasonably" sure they wouldn't be a problem... but I'd rather KNOW before I load them. I figured that by having the bolt slam on a few primed but unloaded cases would duplicate the condition that would cause a slam fire. The fact that they did not detonate and look otherwise normal, I figure they're ok. Was looking for feedback from anyone who has experienced the situation themselves, and what the result was. Has anyone experienced this with PPU brass? It was pretty tough to deprime, I'd say the toughest I've ever encountered. I remember I even checked the first case thinking maybe it was Berdan primed. |
|
Quoted:
Innocent... forgive me for being "dense", but I'm not seeing how your info answers my question. You made it sound like only the CCI primers sat high. I posted the primer size data for us to see if maybe there was a reason the CCI sit higher. The data I posted didn't really answer that since the CCI 400 primers aren't much bigger than other brands in any dimension. |
|
Quoted:
Quoted:
Innocent... forgive me for being "dense", but I'm not seeing how your info answers my question. You made it sound like only the CCI primers sat high. I posted the primer size data for us to see if maybe there was a reason the CCI sit higher. The data I posted didn't really answer that since the CCI 400 primers aren't much bigger than other brands in any dimension. No, No, sorry. I only use CCI anymore. The CCI 400's sit normal in every other case, it's only the PPU's that they sit slightly above flush. I'm wondering if the flash hole might have been "undersized" and that might explain why they were so hard to de-prime? If that is the case, then maybe the bottom of the pocket deformed slightly causing them to sit high. The pockets on the PPU's were comparatively clean if I remember correctly, so they didn't require much cleaning. |
|
If you can see and feel the primer above flush, then you are probably at least +.002.
I had this problem when I first started reloading for an ar-15. The brass was WIN and REM, and the primers were CCI 400's. I fired a few at first and nothing bad happened. Then, after reading and hearing more about the higher risk of slam fires with high primers, I deprimed them (carefully and slowly) and started uniforming my pockets. Never had a problem with high primers again. If it were me, that's what I would do with yours––it's not worth the risk. |
Armory Sponsor
Join the Community
Your next conversation starts here.
Create your free account to join discussions, share your experience, save topics, and connect with the AR15.COM community.
- Join discussions
- Follow topics and replies
- Connect with fellow enthusiasts
Already a member? Sign in
Stay informed by subscribing to our Newsletter