Blown primer pic

SuperCub said:
Before you git yer knickers all knotted up, you should know that GH and TB are "life partners".

For them it's for better or worse, and are always squabbling in the internet. We just got used to it after a time.



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OK I get it. I just don't like people who think they are all knowing. But if they are "partners" it makes it funny.
 
joe-nwt said:
Weird looking hole in that primer, kind of a line, rather than the more "round" holes that I have seen. Any chance that might have been a defective primer?

Or is the pic deceptive?
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That was my thought too. Not like any blown primer I've seen. Something strange there. Does the firing pin have any burrs on the end, sharp like, that may have caused it to tear a strip out like that? The corners of the primer are still rounded, and that makes me think this is a low pressure incident.
Defective primer, or firing pin damage are the two things that come to mind right away as possible causes.
Can you send the pic to Federal? Might get some freebies, who knows?
 
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This is what you will see if the primer cup has a weak area around the edge and then is subjected even to "normal" pressures. I have witnessed this several times in 40+ years of reloading. Typical primer issue. Regards, Eagleye.
 
Eagleye said:
This is what you will see if the primer cup has a weak area around the edge and then is subjected even to "normal" pressures. I have witnessed this several times in 40+ years of reloading. Typical primer issue. Regards, Eagleye.
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Curious what primers you use Eagleye.
I've also been reloading for near 40 years, and all the blown/pierced primers I've seen where my fault, or a problem with the rifle.
Not debating the primer in the pic, I agree faulty primer is a likely cause.
Could be the cartridges I reload too, as the majority tend not to be above 40,000psi.
 
I had a similar situation many years ago using Remington 6 1/2 small rifle primer in .223 Rem. I bought 1000 of these for $7.00 at a gun show. In retrospect it was false economy. At the time I thought all small rifle primers were interchangable. :redface:

One of these primers blew a small hole in it's outer edge. All seemed normal until I noticed smoke coming from the breech of the rifle. No damage to either rifle or shooter.

I sent the fired case to Remington & they replied that 6 1/2 primers should only be used in .22 Hornet, 32/20 & other low pressure applications. Apparently the 6 1/2 prime has thinner cup material than their 7 1/2 primer.
 
I had a similar situation many years ago using Remington 6 1/2 small rifle primer in .223 Rem.
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Exactly same with me and my .222. The Remington 6 1/2 small rifle primers would pierce even with modest loads so I sidelined them since I don't have a 22Hornet - still have 600 or so left.
 
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