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Old May 12, 2006, 02:07 AM   #1
geronimo13
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Primer not firing

After about 100 reloads shot, 3 didn't fire although the firing pin dimple was there. I'm thinking lube got the primers wet? Anything else to look for? thanks
Oh ... cci small rifle #400 primers.
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Old May 12, 2006, 05:52 AM   #2
Yuriens
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did you try refiring them? A primer not seated far enough might fire on the second try. Otherwise something got on the primers or manufacturing issue.

Mike
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Old May 12, 2006, 07:55 AM   #3
BIGRED
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That is the #1 reason i stopped using CCI primers. I have never seen this issue since i switched to Winchester primers.
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Old May 12, 2006, 08:11 AM   #4
Lycanthrope
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Getting lube in a primer can trash it. I've loaded over 4000 CCI 400's since the beginning of 2006 and they all light with a reduced (19lb) hammer spring in my 1911's. Since they are small rifle primers, however, they are made to be a bit harder and won't reliably light if you seat them high.
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Old May 12, 2006, 08:32 AM   #5
Leftoverdj
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Primer not fully seated is the most common cause.
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Old May 12, 2006, 10:29 AM   #6
Kelly J
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Geronimo13

A friend of mine had a S&W 610 that did a simular trick on him and drove him crazy, he found out that after taking it to the gunsmith the main spring had loosened up to the point that it was not getting a reliable delivery to the firing process, not saying that is YOUR problem but if the primers are not killed as mentioned you might check the firing pin spring for proper tension.

In this case the primers were all dimpled by the firing pin but the round did not fire even after trying the secong time, when I put the round in my gun it did fire, that is when he took it to the gunsmith.
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Old May 12, 2006, 10:47 AM   #7
30Cal
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Excessive FL resizing will also cause light primer strikes.
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Old May 12, 2006, 11:07 AM   #8
Superhornet
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Only if you size incorrectly and set the shoulder back to change the headspace.......not with a rimmed case, not with a straight wall pistol or rifle case. Only with a bottle neck case. Not if you headspace on the belt of a mag.......
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Old May 12, 2006, 11:44 AM   #9
hoghunting
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Try firing them again. I also think the primers were not seated all the way. If that is not it, you might want to take the bolt apart and give it a good cleaning as it might have dried grease and dirt slowing down the firing pin.
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Old May 12, 2006, 12:13 PM   #10
Leftoverdj
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It's very possible for a firing pin strike to crush the primer pellet without detonating it. When this happens, subsequent strikes cannot detonate it.
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Old May 12, 2006, 12:39 PM   #11
BIGRED
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so explain how i can load CCI's and have this issue, then change to all Win primers and never see it again. I do not believe it is from incorrect seating depth. I believe it is a quality issue. alot of people have had issues with CCI's.
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Old May 12, 2006, 02:45 PM   #12
Ifishsum
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Nobody likes to think that something is wrong with their technique or their weapon - they'd rather fault the components. I've loaded well over 5000 rounds with CCI primers without a single misfire in 9 pistols and rifles I handload for, but my brother's GP100 has misfires with them. Does that mean there's an issue with CCI primers or with his pistol? (my Taurus will almost always light them off afterwards)

A possible explanation - it's popular notion that CCI primers use slightly thicker metal cups, and one I generally agree with. If any of the previously stated faults (seated incorrectly, weak spring, gunked up FP) are starting to show up, I think you'll notice it first with CCI primers. If so, switching primers may only be a temporary fix to a larger problem. At the very least it's worth investigating before the blame is placed on the primer. Just my .02...
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Old May 12, 2006, 02:53 PM   #13
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I haven't loaded umpteen thousand CCI primers, but of the approximately 500 CCI-200's I've loaded for my Yugo M24/47 and Swiss K31 I've never had a misfire.

Then again, I don't use liquid lube either. I use Hornady one shot. Works great, dries quick (leaves film of lubricant), doesn't foul primers.
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Old May 12, 2006, 07:07 PM   #14
geronimo13
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Thanks all. I did reshoot the 3 at the end of the day and no boom. I took the firing pin out at the range and looked at it and it seemed ok. This is in a Keltec su 16 autoloader and I used veg. oil to lube cases and didn't clean primer pockets. I don't think lube would have got in there though. I don't have any misfires (556) with the mil surplus which has thicker(?) primers. There is no spring on the firing pin. If the primers aren't seated at least flush (i can't feel them being high) I don't shoot them. The excessive resizing allows the cartrige to move forward in chamber makeing the firing pin come up short?
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Old May 12, 2006, 07:13 PM   #15
Tim R
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Quote:
so explain how i can load CCI's and have this issue, then change to all Win primers and never see it again. I do not believe it is from incorrect seating depth. I believe it is a quality issue. alot of people have had issues with CCI's.
I use everything but Winchester primers depending on what I'm loading. I've used a ton of CCI's in LR, LP and SP and have found them to always fire. For small Rifle I like to use Rem 71/2's. For my wheel guns I use Federal's.

The reason I don't use Winchester primers is because my favorite hunting load group opened up to over 1 1/2 inches from sub MOA and their SR primers pierce too easy with the load I'm using on the AR as does Federal GM SR primers.

Winchester Primers are great if using ball type powders.
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Old May 13, 2006, 12:09 AM   #16
30Cal
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Quote:
The excessive resizing allows the cartrige to move forward in chamber makeing the firing pin come up short?
It can, yes. You've basically created excessive headspace if that's the case. If you haven't checked your sized cases lately with a case gage, I'd highly recommend it.
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