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Pin hole in primers

 
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  #1  
Old 11-29-2008, 10:50 PM
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Pin hole in primers

I've got a 338 rem ultra mag in which I have reloaded for and had 3 primers develop a pin head sized hole in the edge of the primer melting some brass as well as the some of the face of the bolt, these are Federal 215m primers. these loads for this gun are below max and show no extraction difficulty. I suspect the age of the primers may be an issue, but the age is not known at this time(a friend of my son gave him 5000 primers) but am not certain. I'm using new Remington brass .
Does anyone have any ideas what would cause this to happen?
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Old 11-30-2008, 02:45 AM
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Re: Pin hole in primers

Anyone?
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Old 11-30-2008, 02:54 AM
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Re: Pin hole in primers

When you say "below max" do you mean according to a reloading manual or according to your observations and field tested data?

Have you chronographed any of the problem loads and if so, how did the velocities compare to what you normally have been showing?

Did you do any case prep on the brass before loading?

Can you remember how the primers felt when seating them?
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Last edited by ss7mm; 11-30-2008 at 03:00 AM. Reason: added a question
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Old 11-30-2008, 08:05 AM
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Re: Pin hole in primers

It sounds like these primers are wrong somehow. They might be old or defective or whatever but I would advise trying new primers. I have loaded the 338RUM and used Win. Magnum rifle primers without any problems.
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Old 11-30-2008, 08:28 AM
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Re: Pin hole in primers

Quote:
Originally Posted by ss7mm View Post
When you say "below max" do you mean according to a reloading manual or according to your observations and field tested data?

Have you chronographed any of the problem loads and if so, how did the velocities compare to what you normally have been showing?

Did you do any case prep on the brass before loading?

Can you remember how the primers felt when seating them?
Is there any chance you deburred the inside of the primer hole? Or increased the primer hole in any way? I've seen this lead to all sorts of pressure/primer problems.

AJ
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  #6  
Old 11-30-2008, 09:09 AM
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Re: Pin hole in primers

AJ,
How, Why:confused:
I thought this was a recommended step
for consistent ignition?

Mike
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  #7  
Old 11-30-2008, 09:22 AM
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Re: Pin hole in primers

Quote:
Originally Posted by gamehauler View Post
AJ,
How, Why:confused:
I thought this was a recommended step
for consistent ignition?

Mike
I saw a primer HOLE tool that made the holes too big and caused more pressure back into the primer. Done correctly, deburring only helps.

AJ
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