ID rifle type by shell casing

[dw1784]

gents,
wondering what type of rifle this shell casing came from:
IMI 308 case with rifling type indentation running longitudinally from case mouth to mid-length. Has a dent similar to ejection dents on semiauto rifles like FAL's. H&K's perhaps? thanks.

1600x1200 pix:

http://img42.imagevenue.com/img.php?image=15915_P4200013_122_1050lo.JPG

http://img23.imagevenue.com/img.php?image=15920_P4200009_122_657lo.JPG

http://img153.imagevenue.com/img.php?image=15926_P4200011_122_379lo.JPG

[stevie]

I used to have an HK 91 that made those marks.

[Rivet]

Yep. HK-91 has a fluted chamber.

[brando]

Agreed.

[SLYoteBoy]

Weird , ive never seen a case have any sort of marks like that. Maybe a little fire forming , but no flute marks like that.

[brando]

A lot of HK weapons have fluted chambers to assist extraction. Normally you see powder marks in that pattern but that one looks a bit on the overpressure side.

[grumpy562]

hk marks

[grammaton76]

Wow. That gun didn't just shoot the ammo, it exhausted its store of ire and contempt upon the brass too!

I wondered why folks say the HK91's don't leave brass reloadable... my PTR-91 doesn't do anything approaching that horrible to brass!

[Draven]

yup, that's H&K-chewed brass. I have two 9mm pieces from the MP5 i fired in Vegas.

[mike100]

My P7m8 also does that, but it doesn't hurt anything.

[bu-bye]

wow that sucks. You can kiss that case good bye. I have never seen a case like that but I'm glad I now know about HK's.

[6172crew]

HKs use a fluted chamber to assist in proper ejection of empty cases.

[1911whore]

hk

it is an hk. g3 or 91 but not only the fluting but creasing the brass across due to violent ejection. love the rifles but passed on a 91 cause i cant reload the stuff.