This is a discussion on Primer symptom within the MP Reloading forums, part of the Smith & Wesson MP Forum category; primer sypmtom.jpg The attached pic shows a fired round that appears to show the firing pin impression in the primer dragging to the left side ...
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|September 27th, 2016, 10:00 PM||#1|
Join Date: Aug 2016
Location: Lincoln City, OR
The attached pic shows a fired round that appears to show the firing pin impression in the primer dragging to the left side as the brass is ejected and some primer cup material being displaced out of the indentation...at least that's my interpretation. Please comment on what might be causing this. The ammo was near max to max loads so over-pressure could be involved but it's the drag mark that has me concerned. I didn't have any other ammo with reduced loads to compare. I didn't notice the symptom until they were inspected later.
|September 28th, 2016, 08:53 AM||#2|
Join Date: Sep 2006
That's caused by the way the breech face is made on the M&P, its perfectly normal, nothing to worry about. See attached photo.
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