Your Thoughts: M&P Shield "Keyhole" marks on primer

[rbeau30]

So I took the M&P Shield .40 out the other day first auto pistol I have owned beside AR pistols.

Fired some rounds to familiarize myself with the tool. I fired Federal Hydrashocks, Federal American Eagle FMJ, and some Hornady Critical Duty rounds. Sorting through the spent brass, I noticed that the primers had a keyhole mark left on them. Almost as though the firing pin was not retracting fully before the spent case was ejected.

A little worried that this will add some extra wear an tear on the firing pin, and I probably should have it looked at by S&W, but just wondering if anyone else had this issue with their Shields or any other handguns.

Figured this fits under the "Ask-a-Member and I need help with..." portion of the section.

I'll get pictures up when I get home, I was going to ask someone at work that has the same pistol I have but he hasn't fired his yet.

[Gman]

That's known as firing pin 'wipe'. I've also heard it described as primer wipe. Many pistols do it and it's not unusual.

Sent from my electronic leash.

[rbeau30]

That's known as firing pin 'wipe'. Many pistols do it and it's not unusual.

Sent from my electronic leash.

Awesome! Thanks!

[Gman]

I just thought of something. Did your new pistol come with a fired case? If it did, does the primer look comparable to what you're seeing?

[rbeau30]

I just thought of something. Did your new pistol come with a fired case? If it did, does the primer look comparable to what you're seeing?

Thanks Gman it did and it does!