  | Pin hole in primers |
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11-29-2008, 09:50 PM
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Junior Member
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Join Date: Nov 2008
Posts: 6
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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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11-30-2008, 01:45 AM
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Platinum Member
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Join Date: Feb 2005
Location: Nevada
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Re: Pin hole in primers
Anyone?
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11-30-2008, 01:54 AM
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Platinum Member
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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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ss7mm
Last edited by ss7mm; 11-30-2008 at 02:00 AM..
Reason: added a question
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11-30-2008, 07:05 AM
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Silver Member
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Join Date: Apr 2007
Location: Fort Morgan, Colorado
Posts: 195
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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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Dennis
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11-30-2008, 07:28 AM
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Platinum Member
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Join Date: Oct 2005
Location: Michigan
Posts: 2,232
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Re: Pin hole in primers
Quote:
Originally Posted by ss7mm
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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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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11-30-2008, 08:09 AM
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Silver Member
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Join Date: Dec 2007
Location: Central AZ.
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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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11-30-2008, 08:22 AM
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Platinum Member
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Join Date: Oct 2005
Location: Michigan
Posts: 2,232
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Re: Pin hole in primers
Quote:
Originally Posted by gamehauler
AJ,
How, Why:confused:
I thought this was a recommended step
for consistent ignition?
Mike
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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
__________________
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
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