Funny looking primers
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Old 06-17-2010, 02:27 AM   #1
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Default Funny looking primers

Bought a used 1982 Browning BDA.380ACP.shot my factory loads and reloads,here is what the primers looked like upon inspection.Any ideas as to what caused them to look as they do?.
380acp-primers-006-small-.jpg  
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Old 06-17-2010, 03:03 AM   #2
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Default Primers??

The first thing I would check would be the head space of your barrel. To me it looks like you have too much "slop" in your chamber??
You may have a gunsmith check with "Go"/"No-Go" guages??
The cheap fix would probably be a replacement barrel..Poss. aftermarket would work??
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Old 06-17-2010, 11:47 AM   #3
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Looks like a lose chamber to me as well.

Or it is an over pressure but it would show more flow around the firing pin and nothing else.
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Old 06-17-2010, 01:11 PM   #4
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I would also look at the crimp. Too much crimp can cause excessive headspace. This looks like excessive headspace but not excessive pressure. High pressures will not show the rounded primer edges or the rounded appearance around the firing pin stike. The fact the area around the FP strike is raised and rounded tells me there was too much space between the case head and the breach face, excessive headspace.
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Old 06-17-2010, 04:49 PM   #5
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Take a look at the recoil plate in your pistol. The firing pin hole will be the size of the ring around the pin imprint. The primers are being pressed into that oversized hole. That's a manufactoring defect. If the pistol is still under warrantee I would send it back. In fact, I would send it back no matter how old it is or who the original owner was.
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Old 06-17-2010, 05:06 PM   #6
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That would have to be one really seriously oversize firing pin hole for those markings.
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Old 06-17-2010, 05:11 PM   #7
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Remove the barrel and drop a factory loaded round into the chamber. The base should sit even with or VERY slightly under the barrel hood (the squared projection at the top). If the factory round goes deeper than that, you have a chamber problem (time for a new barrel). If that checks out OK, drop one of your reloads in. It should stop at the same place. If it goes in deeper, you have an ammunition problem. The firing pin should fit in the FP hole in the breach face with little extra room, very little.
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Old 06-17-2010, 08:15 PM   #8
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I've seen similar results with too light ( or worn out) of a recoil spring--the slide releases early and pressure comes back through the primer. However, I can't explain the second indent around the firing pin dimple...
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Old 06-17-2010, 08:40 PM   #9
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I think Missileman might be on to the problem worn out or broken spring which is causing the head space issue and the dimple
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Old 06-17-2010, 10:10 PM   #10
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"That would have to be one really seriously oversize firing pin hole for those markings. "

Yeah. But, there they are.
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