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Old 10-08-2012, 09:03 PM   #31
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I have to be honest I would never had guessed a cloth patch could do that.

I had it pretty much pegged as obstruction, but as stated above I thought it was a squib or maybe as C3 alluded a pulled bullet by having too long of a reload.

One cloth patch and you got yourself $1500 worth of scrap metal.

I guess we should ask, was the guy seriously hurt? Or just his pride?

Excellent post '03!!

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Old 10-08-2012, 09:13 PM   #32
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Havoc,
As we know it certainly was not the rifles fault at all! It was a Colt M-4.
The only explanation I had regarding the patch causing this was.
1. The patch started from just somewhere inside the beginning of the chamber in the free area. The bullet tip being pointed picked up the patch somewhere in the middle of the patch material which evenly distributed the patch out over the tip of the bullet. And as it traveled forward the brake of the patch between the bore and the side of the bullet got tighter and tighter and at the same time the pressure kept building and building. And finally cleared to bore in pieces. As the bullet came apart due to the pressure. That is what caused the damage and rough area in the bore was when it finally fragmented. I can only imagine what the psi was in that barrel at the time!
You are correct! All of the years I have spent with the Black Gun and in the industry. This was "THE" worst event (Blow Up) I have ever seen. Thank God it was a 7075 T-6 Aluminum Receiver. If it had been a metal machined receiver the officer would no doubt be DRT! He would have had the same as a hand grenade setting on his shoulder!!!

03

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Old 10-08-2012, 09:24 PM   #33
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Quote:
Originally Posted by Sniper03 View Post
Havoc,
As we know it certainly was not the rifles fault at all! It was a Colt M-4.
The only explanation I had regarding the patch causing this was.
1. The patch started from just somewhere inside the beginning of the chamber in the free area. The bullet tip being pointed picked up the patch somewhere in the middle of the patch material which evenly distributed the patch out over the tip of the bullet. And as it traveled forward the brake of the patch between the bore and the side of the bullet got tighter and tighter and at the same time the pressure kept building and building. And finally cleared to bore in pieces. As the bullet came apart due to the pressure. That is what caused the damage and rough area in the bore was when it finally fragmented. I can only imagine what the psi was in that barrel at the time!
You are correct! All of the years I have spent with the Black Gun and in the industry. This was "THE" worst event (Blow Up) I have ever seen. Thank God it was a 7075 T-6 Aluminum Receiver. If it had been a metal machined receiver the officer would no doubt be DRT! He would have had the same as a hand grenade setting on his shoulder!!!

03
Note to self never buy COLT. LOL just kidding just a simple operator ,hurry up, rush it error that could have been alot worse than it was including others around it. Im sure that was a lesson learned by many to take a quick peek down the barrel even if it takes a extra 10 seconds to pull the BCG and take a peek and put it back in
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Old 10-08-2012, 09:58 PM   #34
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Be sure to get all oil and bore cleaner residue out of the barrel as well. If it's still moist, a thin layer could pool up into a droplet. One droplet of oil could (potentially) blow your rifle. I wouldn't have guessed it was a patch, because I'd assume nobody would be careless enough to leave one in their barrel. I always hook mine and I even look at them when they come out to check if they're clean, how damp they are, etc.. Lets me know how much fouling, oil is left in there.

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Old 10-08-2012, 10:14 PM   #35
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DAYHUM that sux! I would not have guessed a patch.


A couple of months ago at the range I was letting a friend shoot my AR10 ... loaded a round, pulled the trigger ... and nothing. He immediately pulled the charging handle and was to pull the trigger again when I stopped him

I hadn't noticed a round get ejected when he pulled the charging handle ... sure enough a round was still in the chamber and another jammed up with the bolt. Took a while to get it unjammed

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Old 10-08-2012, 11:07 PM   #36
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Ha, I told y'all that's what it was! I just didn't post it becUse it was so obvious i allowed y'all to guess! Roll eyes

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Old 10-09-2012, 10:21 PM   #37
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hmmmmmmmm, now i know why i ALWAYS look down the barrel after i push wet and dry patches thru my firearms.

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Old 10-10-2012, 04:46 AM   #38
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There's a video from HK comparing the HK416 to the Colt. They obstructed the barrel and actually had a guy fire it, while wearing a welding mask. The results were exactly as you described. Blew the receiver to hell.
The HK416 didn't do this, but I don't know enough to claim the 416 is that great, or if its HK propaganda.

However, my initial guess is that it was one of those airsoft guns converted to fire live ammo that had the ATF all worked up over.

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Old 10-11-2012, 01:55 AM   #39
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Quote:
Originally Posted by Mosin View Post
There's a video from HK comparing the HK416 to the Colt. They obstructed the barrel and actually had a guy fire it, while wearing a welding mask. The results were exactly as you described. Blew the receiver to hell.
The HK416 didn't do this, but I don't know enough to claim the 416 is that great, or if its HK propaganda.

However, my initial guess is that it was one of those airsoft guns converted to fire live ammo that had the ATF all worked up over.


it's got something to do with the way the HK "vents" it's gases.......that's why it's able to immediately fire upon exiting a watery grave.

"HK416
The HK416 (5.56 mm) was developed by Heckler & Koch for U.S. special operations forces as a major product improvement of M4/M16-type carbines and rifles. Using the HK-proprietary gas piston system found on the G36, the HK416 does not introduce propellant gases and carbon fouling back into the weapon’s interior, making it the most reliable of any M4/M16 type weapon.

The HK-proprietary gas system uses a piston driving an operating rod to control the function of the bolt, preventing propellant gases and the associated carbon fouling from entering the weapon’s interior. This increases the reliability of the weapon and extends the interval between stoppages. It also reduces operator cleaning time, heat transfer to the bolt and bolt carrier, and wear and tear on critical components."


could be true..........who knows!
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Old 10-11-2012, 02:23 PM   #40
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Seen the video a bunch of times on military channel. I just don't see any reason to go into the hole to get one.

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