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06-08-2011, 04:06 PM
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#1
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M-4 failure
We had an incident a last week with one of our officers and his personal M-4. It is believed that a round “telescoped” into the casing and caused such an increase in preassure that it resulted in the following catastrophic failure. Officer was not hurt but weapon is a total loss.
Scubie
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JW Hardin
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06-08-2011, 04:08 PM
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#2
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Next set of photos....
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"I never killed anyone who didn't need killing."
JW Hardin
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06-08-2011, 04:09 PM
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#3
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last set.........
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"I never killed anyone who didn't need killing."
JW Hardin
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06-08-2011, 04:11 PM
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#4
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I'm trying to wrap my head around how this happened, But I don't understand the term "telescoping"
CRAZY none the less 
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Have fun Brian
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06-08-2011, 04:55 PM
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#5
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Wow, that's amazing! Glad he wasn't hurt, but I don't get "telescoping" either. Enlighten us.
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06-08-2011, 05:04 PM
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#6
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Sorry guys sometimes I think everyone knows what I’m thinking when I’m thinking it.
Telescoping is when the round (bullet) is forced down into the neck of the cartridge (brass case) kind of like a old time telescope or a collapsible baton. This causes an increase in pressure when fired. If the bullet is not aligned with the neck opening or completely out of the neck and in the casing then you have a catastrophic failure as the round has no where to go.
I’ve heard of these but never witnessed one myself.
Scubie
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"I never killed anyone who didn't need killing."
JW Hardin
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07-07-2011, 04:17 PM
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#7
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Great post, scubie!!!
After looking at the pictures, I was wondering if the lower was also damaged?
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-=Jerry A. Goodson=-
Last edited by hydrashok; 07-07-2011 at 04:20 PM.
Reason: Brain fart: the feed ramp is part of the bbl on an M4
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07-07-2011, 04:23 PM
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#8
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Wow, that's nasty. I'm glad the officer is alright.
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07-07-2011, 04:31 PM
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#9
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Saw a kaboom on another forum recently that caused similar damage.
It was caused by an apparent squib round lodging in the barrel just in front of the chamber. Shooter didn't hear the squib and treated the stoppage like a fail to fire.
Tap-Rack-BOOM. Actually blew the flat top rail and optic off the rifle.
Shooter was also unhurt
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07-07-2011, 04:42 PM
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#10
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Just a cupla questions what amo was he using or was he rolling his own?
Thanks F.K.
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