Any idea what might cause this?

[George9]

I had this issue on a few guns over the years and for me my fix was to try and see were the brass is landing and how it's comming out of the port.. I have found that a slight change to the ejector face will have a huge change in how the brass gets kicked out of the gun..George

 

[M&P Charlie]

The brass is landing all over the place. It happens to every round and none of these were stepped on. I was using one magazine the whole time due to wait times. I will test my extra magazine as well as mark some rounds with a sharpie and report back.

Thanks for all of the suggestions. I love this community.

 

[M&P Charlie]

Ok. I took 2 rounds and marked them 12 o'clock 3, 6 & 9. I loaded 1 with 12 facing up. Fired it without a magazine in it. The defect was on the 3 o'clock position. I took the second round and fired it the same way. The defect was at the 3 o'clock position again.

Any ideas?

 

[Jyezahn]

3 o'clock as you're looking at the bullet tip or as you're looking at the primer?

 

[3hounds]

The casing is hitting the ejection port on the way out as previously mentioned.

First thing I would do is pull the ejector and clean it well.

New ejector or maybe you can bend it.

Look for a brass mark on the gun to see where it's hitting it at.



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[VMaxSplat]

The casing is hitting the ejection port on the way out as previously mentioned.

Yep, and it is very common in "compacts" like the 40c. If the gun runs reliably, don't worry about it.

 

[M&P Charlie]

3 o'clock is as if I were looking straight down from the bullet side.

Thanks for the help. I'm no gunsmith. Not sure how easy the ejector is to get out. Any advice on removal?

 

[scooter123]

I think you should just leave it alone. Cause is likely a very minor timing issue with the ejector post and trying to "fix" it will most likely lead to an unreliable pistol.

As for concerns about your brass, DON'T WORRY ABOUT IT. Brass is actually a rather sturdy material and that minor dent will completely vanish when you re-size and decap the case.

 

[3hounds]

S&W M&P - Complete Disassembly - YouTube

Complete teardown M&P

You don't have to pull the ejector, pull the slide (SORRY) and clean it.

Make sure it isn't bent or broken.

3 0'clock from the bullet side ?

So shooting the gun the mark is on the left of the case ?

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[M&P Charlie]

The cases are looking worse and are denting even more. The blemish does not disappear when resized in my Lee Carbide resizing die.
Can someone explain to me how it is hitting the extractor in the first place seeing how its the part that pulls the casing out of the barrel? And the casing falls through te magazine well and into my hand after firing.

 

[M&P Charlie]

S&W M&P - Complete Disassembly - YouTube

Complete teardown M&P

You don't have to pull the ejector, pull the slide (SORRY) and clean it.

Make sure it isn't bent or broken.

3 0'clock from the bullet side ?

So shooting the gun the mark is on the left of the case ?

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I have cleaned the gun. Or at least pulled the slide off and cleaned the barrel and slide. The defect is on the right side if you are aiming the gun. I also experienced a light fire as well. The bullet got lodged in the barrel. When I looked at the primer there was a very very small indention from the firing pin. Very light compared to other fired cases.

 

[George9]

No need to take out the ejector.. You case is coming out at a sharp angle and slower or faster then need be.. If it was me... " Now take into considoration I could see and fire the gun" I would make sure the face of the ejector is squre to the frame if not already bent use a dimond stone on it's face just a few strokes at a time fire the gun, as you see inprovement to can contunue or change to a slight up angle on it only if need be. Fire it a few rounds check them again.. Or better yet take it to a local gun smith that has time to do it while you wait as this will take less then 5mins and he more then likly won't charge you a dime.. or you could send it back to S&W and wait and wait.. It's a easy fix and if your not reloading no big deal if the gun is used for CCW or defence then it's timing to eject spent brass should be fixed as it could cause malfuctions at any time.. sory for the type-o's I'm having issues here.. George

 

[Jyezahn]

3 o'clock is as if I were looking straight down from the bullet side.

Thanks for the help. I'm no gunsmith. Not sure how easy the ejector is to get out. Any advice on removal?

Hmm, so when firing the gun, the side that the mark is occurring on, is the left side? Interesting... are the casings being ejected straight upward? I could see the mark coming from an upward ejection, maybe the casing grazes the top left side of the slide ejection port... but not if it ejects to the right. Odd.

 

[3hounds]

Ok right side aiming gun makes sense.

I had a Sigma that would do that and had to bend the extractor down a little bit so it was lower on the back of the case.

Making the extractor lower it would kick the case over the slide instead of hitting it.
Open the slide insert loaded mag., look at the extractor it should just be touching the top round in the loaded mag.

Bullet lodged in barrel (reloads).

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