Has Anyone Experienced This Before...

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JarHeadTim
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Has Anyone Experienced This Before...

Post by JarHeadTim »

Hi...

Bought a 16 Factory NIB upper in 300 Blk. The recurring case mouth deformation is obviously consistent. The Left group of cases that were fired for load development and the right group was factory ammo and a different case...

Image

Anyone KNOW the cause of this...?

S/F
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bangbangping
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Re: Has Anyone Experienced This Before...

Post by bangbangping »

I've been here for years and nobody has ever mentioned anything like that. :lol:
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steven11b
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Re: Has Anyone Experienced This Before...

Post by steven11b »

I havent ever seen anything like that.
Life is hard but its harder if your stupid-John Wayne
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smustian
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Re: Has Anyone Experienced This Before...

Post by smustian »

SEARCH "dented case mouth" and have fun reading for days.
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bangbangping
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Re: Has Anyone Experienced This Before...

Post by bangbangping »

Some options we may want to think about:

Image

:lol:
Guest762
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Re: Has Anyone Experienced This Before...

Post by Guest762 »

bangbangping wrote:Some options we may want to think about:
Image
:lol:
Now now he's only been a member for 5 years you can't expect him to know everything :lol:
And with a name that starts with jarhead he may have been in a foxhole for the last 4.
sirgknight
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Re: Has Anyone Experienced This Before...

Post by sirgknight »

who is the manufacturer of the upper? I would probably start by contacting them with the problem and ask for their input.
TRshootem
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Re: Has Anyone Experienced This Before...

Post by TRshootem »

This case mouth denting is common on 300 BLK AR's. It really is no big deal, as they are usually not hurt enough to be resized.

I use a cut down piece of stick on bike tire patch and attach to the face of the brass deflector, where the brass is leaving a mark. It only takes a small piece to attached there to ease your worried mind.

Mine were blue in color, a black marker made it all but disappear, it worked just fine.

TR
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smustian
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Re: Has Anyone Experienced This Before...

Post by smustian »

TRshootem wrote:This case mouth denting is common on 300 BLK AR's. It really is no big deal, as they are usually not hurt enough to be resized.

I use a cut down piece of stick on bike tire patch and attach to the face of the brass deflector, where the brass is leaving a mark. It only takes a small piece to attached there to ease your worried mind.

Mine were blue in color, a black marker made it all but disappear, it worked just fine.

TR
Sticky backed Velcro works better and no need for a Sharpie. :P
JarHeadTim
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Location: Oklahoma City, OK

Re: Has Anyone Experienced This Before...

Post by JarHeadTim »

TRshootem wrote:This case mouth denting is common on 300 BLK AR's. It really is no big deal, as they are usually not hurt enough to be resized.

I use a cut down piece of stick on bike tire patch and attach to the face of the brass deflector, where the brass is leaving a mark. It only takes a small piece to attached there to ease your worried mind.

Mine were blue in color, a black marker made it all but disappear, it worked just fine.

TR
Thank you TR, that's all I needed to know...

S/F
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