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Posted: 11/19/2008 5:03:48 PM EDT
I received a thousand of these and am wondering what 10mm fired them, the long thin lines are something I have never seen.


Link Posted: 11/19/2008 5:10:36 PM EDT
Looks like HK fluting.  My guess is a MP10.

DHG
Link Posted: 11/19/2008 5:19:09 PM EDT
Yeah, I second the whole 10mm MP5 theory
Link Posted: 11/19/2008 5:21:45 PM EDT
Originally Posted By shogun187:
Yeah, I second the whole 10mm MP5 theory
3rd

Link Posted: 11/19/2008 5:21:53 PM EDT
Originally Posted By dhg21:
Looks like HK fluting.  My guess is a MP10.

DHG


+1
Link Posted: 11/19/2008 5:28:41 PM EDT
Looks like H&K fluting to me.
Link Posted: 11/19/2008 5:34:12 PM EDT
That's what I was gonna say.  

I don't know the innards of the MP5/10 that intimately, but I do know it's not all that different from the G3 type of system, delayed blowback/roller locking and all.  

And the G3 clone I had made those exact same kinda marks due to the fluted chamber.
Link Posted: 11/19/2008 6:01:13 PM EDT
MP5 variant -

Link Posted: 11/20/2008 1:45:01 AM EDT
Definately HK 10mm MP5.  Any FBI agents training where you picked that up?
Link Posted: 11/20/2008 8:20:00 AM EDT
I got 1k online so I don't know the origin. There were some with crimped primers and several split cases for being once fired so I thought maybe a loose chambered full auto of some sort.
I didn't think 10mm was still used by government agencies, but I'm not really in that "loop" so I wouldn't have a clue.

Maybe it's Ted Nugents' old brass, he was bragging about getting an MP5 in 10mm a while back.

Those lines sure don't come off easy, they have about 8 hours in the tumbler now and many of the lines are still there.
Link Posted: 11/20/2008 11:00:40 AM EDT
Originally Posted By popnfresh:
I got 1k online so I don't know the origin. There were some with crimped primers and several split cases for being once fired so I thought maybe a loose chambered full auto of some sort.
I didn't think 10mm was still used by government agencies, but I'm not really in that "loop" so I wouldn't have a clue.

Maybe it's Ted Nugents' old brass, he was bragging about getting an MP5 in 10mm a while back.

Those lines sure don't come off easy, they have about 8 hours in the tumbler now and many of the lines are still there.


Try adding some NuFinish car wax to your tumbling media.
Link Posted: 11/21/2008 11:26:29 AM EDT
And keep a close eye out for split cases AFTER sizing as well.
I got some of those from GunBroker, tossed about 20 for splits and another 40 for small primers before sizing.
Found another dozen with splits when putting them through the case gage.
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