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Cleaning and inspecting my M&P9 (SN MPBXXXX) this morning disclosed metal flaking off of the chamber interior surface. A number of very small spots up to one approx .070 wide spot. It looks somewhat like windshield chips that don't go thru the glass. I expect it is a basic metal flaw or hardening process error.



There did not appear to be any flaking in the barrel (Rifled) zone.



S&W is sending a shipping lable so I expect it will be taken care of but am curious if any one else has experienced this problem.



It is very hard to see when looking through the barrel at a light. The best way is to shine a light in from the end you are looking at. it may at first appear to be a foreign substance.



:?
 

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Discussion Starter #2
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Used to see the same thing in some Glock bbls; usually goes away after you shoot it enough.



Was told by Glock the interior dimensions of the chamber/bore get the Tenifer finish, some are rougher than others, will polish itself out eventually.



Melonite/Tenifer are different trade names for the same process. If S&W is doing the chamber/bores, might be the same issue and nothing to worry about.
 

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BrokenArrow said:
Used to see the same thing in some Glock bbls; usually goes away after you shoot it enough.



Was told by Glock the interior dimensions of the chamber/bore get the Tenifer finish, some are rougher than others, will polish itself out eventually.



Melonite/Tenifer are different trade names for the same process. If S&W is doing the chamber/bores, might be the same issue and nothing to worry about.


What happened in mine was not the same as your Glocks. Mine lost metal chips similar to rock chips in a windshield. S&W replaced the barrel and 2 rounds of CCI Blazer aluminum ammo damaged it. S&W replaced the barrel a second time and this one will never see aluminum cased ammo.
 

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Thanks for the heads-up TOF.

I've shot a few boxes of Bazer through mine and have not yet noticed a prob.

I guess it's time to get a set of 9mm dies!



nunnya
 
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