I Think we covered this ut what is the cause!

[JWFilips]

A bunch of range found 308 Winchester brass! But this is how it looks....but what is the reason? ( again)

 

[Rick]

Fired in a chamber meant for full auto. With far less surface contact more of the heat goes out with the spent brass and not into the chamber.

 

[Ben]

The brass in the photo was fired in a flutted chamber.
All CETME,/G3/PTR rifles use a fluted chamber.

Ben

 

[RBHarter]

Yep CETME or a Galil . A friend had one .

 

[JWFilips]

Salvageable?

 

[RBHarter]

I shot a few but I was way off maximum loads . I never had a case failure .

 

[fiver]

yeah useable.
warm up a little before re-sizing.
I like to cam over the press and hesitate for a 2 count to let the brass flow a little, then cut the case mouths square.
it will take a couple of firings to get all the marks out.

 

[Pistolero]

HK91, IME, the marks never entirely go away, just mostly, but they reload just fine.
Will also have a big dent in the middle of the case and some rim
damage. G3/HK91 is not kind to the brass. PTR is a US made copy,
CETMEs also have this, actually the predecessor of the G3/HK91 made in Spain.

Ugly but perfectly functional, although sometimes the rim needs a touch of
a file to clean up a burr so it will go into the shell holder.

Bill

 

[JWFilips]

Thanks guys.......I knew you would have the answer