User Panel
User Panel
User Panel
|
Posted: 4/18/2017 2:26:52 PM EDT
[#1]
The problem is not the barrel....the problem is the heat monitor in the bottom right of your screen. You have to wait for it to reduce down to the color green.
|
|
|
|
Posted: 4/18/2017 2:28:23 PM EDT
[#2]
Quote HistoryQuoted:
You've been here 16 years. 16. While I've shot a lot of AR and other semi-auto rifles I've never been a machine gunner and I am not a metallurgist. I know the heat damages the barrel but I was interested in the mechanics of how barrel becomes damaged from heat. Watching at video of an M-16 shooting many rounds until it blows the barrel explains a lot. In the video of the MG42 I believe they said they usually carried 4 spare barrels and would normally change the barrel every 120 rounds or something like that. The whole concept was to switch/rotate the barrel frequently to not allow the barrel to get too hot as it would damage the barrel and also cause malfunctions. |
|
|
|
Posted: 4/18/2017 2:28:51 PM EDT
[#3]
physics man... seriously
|
|
|
|
Posted: 4/18/2017 2:31:14 PM EDT
[#4]
 Heat makes metal soft and stuff, least that's what I heard.
|
|
|
|
Posted: 4/18/2017 2:33:16 PM EDT
[#5]
Get the barrel too hot and keep firing and soon you will be shooting a smooth bore.
|
|
|
|
Posted: 4/18/2017 2:35:24 PM EDT
[#6]
My dad is a combat vet from Korea. He said you could hear the bullets tumbling whenever a machine gunner got excited and quit letting the barrel cool down.
|
|
|
|
Posted: 4/18/2017 2:39:37 PM EDT
[#7]
Quote HistoryQuoted:
My dad is a combat vet from Korea. He said you could hear the bullets tumbling whenever a machine gunner got excited and quit letting the barrel cool down. |
|
|
|
Posted: 4/18/2017 2:52:21 PM EDT
[#8]
It catches on fire.
That's why. ETA- At the end of the vid, you notice we were having trouble getting the bolt to cycle on the tan magazine. The barrel had bent far enough that the gas piston was not lining up with the gas block anymore. Our best guess is that the brake put enough downward force on the barrel to bend it without actually destroying the barrel.  Burning an Ak at Knob Creek October 2015 |
|
|
|
Posted: 4/18/2017 2:58:27 PM EDT
[#9]
Quote HistoryQuoted:
Heat makes metal soft and stuff, least that's what I heard.Steel behaves the exact same way. At well below the actual melting point the steel is like taffy. Hammer or form to desired shape. |
|
|
|
Posted: 4/18/2017 3:01:42 PM EDT
[#10]
 how is prangent formed |
|
|
|
Posted: 4/18/2017 3:04:38 PM EDT
[#11]
A long time ago in a place far far away we would take our tanks for gunnery practice . We never changed out the coaxial Barrel during a run. After it was over, it was a bitch to get all the jacket fowling off the crown of the barrel.
We would usually spin them in sand to clean it off. 
|
|
|
|
Posted: 4/18/2017 3:06:11 PM EDT
[#12]
A long time ago in a place far far away we would take our tanks for gunnery practice . We never changed out the coaxial Barrel during a run. After it was one it was a bitch to get all the jacket fowling off the crown of the barrel.
We would usually spin them in sand to clean it off.
|
|
|
|
Posted: 4/18/2017 3:07:09 PM EDT
[#13]
Quote HistoryQuoted:
Actually more like 17 years back to 2000. While I've shot a lot of AR and other semi-auto rifles I've never been a machine gunner and I am not a metallurgist. I know the heat damages the barrel but I was interested in the mechanics of how barrel becomes damaged from heat. Watching at video of an M-16 shooting many rounds until it blows the barrel explains a lot. In the video of the MG42 I believe they said they usually carried 4 spare barrels and would normally change the barrel every 120 rounds or something like that. The whole concept was to switch/rotate the barrel frequently to not allow the barrel to get too hot as it would damage the barrel and also cause malfunctions. welcome to arf GD |
|
|
|
Posted: 4/18/2017 3:08:26 PM EDT
[#14]
Quote HistoryQuoted:
Yes yes and see above. It it takes more than 200 rounds at cyclic rate to damage the barrel. When in doubt, go cyclic! 
|
|
|
|
Posted: 4/18/2017 3:19:37 PM EDT
[#15]
its fun watching tracers veer off course
and light cigarettes off the barrel |
|
|
|
Posted: 4/18/2017 3:37:29 PM EDT
[#16]
If I remember right, those German barrels are rifled steel, which is different from the M60, M2 and later MG's have stellite liners and are not going to be affected the same.
|
|
|
|
Posted: 4/18/2017 3:59:03 PM EDT
[#17]
Quote HistoryQuoted:
If I remember right, those German barrels are rifled steel, which is different from the M60, M2 and later MG's have stellite liners and are not going to be affected the same. USO makes a Stellite lined m240 barrel for foreign/commercial sales, and the Army has several programs to make a refractory lined M240 barrel, as well as improved M2 barrels. |
|
|
|
Posted: 4/18/2017 4:18:07 PM EDT
[#18]
Quoted:
Just exactly how does the machines gun barrel get shot out or damaged from prolonged shooting? I know it gets very hot and heat damages metal but how exactly does it damage the barrel? Get a barrel hot enough and the surface of the bore in front of the chambers just gets vaporized and eroded away by the high temperature gas. |
|
|
|
Posted: 4/18/2017 4:27:48 PM EDT
[#19]
Quote HistoryQuoted:
That's why an super accurate barrel is called 'A Sweet Shooter'. Quote HistoryQuoted:
Quoted:
Well... the MG42 is an old machine gun and back then the Germans added a high chocolate content to the chemical make-up of the steel and, well, you know what happens to a chocolate bar when you keep it in your pocket too long... Recent advancements in candy coating technology protects the chocolate in the steel from melting away under the heat produced by longer sustained rates of fire... so it's not as much of a concern now. |
|
|
|
Posted: 4/18/2017 4:38:50 PM EDT
[#20]
Quote HistoryQuoted:
The two you mentioned are the only American Barrels with refractory lining. The M240 and m249 are just plain chrome lined steel. USO makes a Stellite lined m240 barrel for foreign/commercial sales, and the Army has several programs to make a refractory lined M240 barrel, as well as improved M2 barrels. |
|
|
|
Posted: 4/18/2017 4:38:57 PM EDT
[#21]
 Attached FileSchool demonstration at a WWII day recently. I'm the gunner... Doctrine was to swap barrels every 250 rounds or so. |
|
|
|
Posted: 4/18/2017 4:46:40 PM EDT
[#22]
Can I use two worn-out MG barrels to dowse water?
|
|
|
|
Posted: 4/18/2017 5:25:05 PM EDT
[#23]
Quote HistoryQuoted:
Can I use two worn-out MG barrels to dowse water? |
|
|
|
Posted: 4/18/2017 5:28:38 PM EDT
[#24]
Die, motherfucker, die...........Die, motherfucker, die..........Die, motherfucker, die..........
|
|
|
|
Posted: 4/18/2017 5:39:50 PM EDT
[#25]
Does the bore get smaller as the barrel expands from heat?
|
|
|
|
Posted: 4/18/2017 5:41:22 PM EDT
[#26]
Quote HistoryQuoted:
Krauts used turtles to cool their MG42 barrels, they ran out of turtles and lost the war. 
I bet they liked the desert, but hated the Russian Front. |
|
|
|
Posted: 4/18/2017 5:43:56 PM EDT
[#27]
Quote HistoryQuoted:
Die, motherfucker, die...........Die, motherfucker, die..........Die, motherfucker, die.......... .....you forgot, we're talking about a GERMAN MG42. 
|
|
|
|
Posted: 4/18/2017 7:30:10 PM EDT
[#28]
Doing a KGKT reweld right now and damn if it doesnt have the thickest .30 cal barrel I have ever seen. 1.5 inches in diameter
 Would like to see how many belts it takes to damage this guy.
|
|
|
|
Posted: 4/18/2017 7:40:57 PM EDT
[#29]
Quote HistoryQuoted:
Well... the MG42 is an old machine gun and back then the Germans added a high chocolate content to the chemical make-up of the steel and, well, you know what happens to a chocolate bar when you keep it in your pocket too long... Recent advancements in candy coating technology protects the chocolate in the steel from melting away under the heat produced by longer sustained rates of fire... so it's not as much of a concern now. |
|
|
|
Posted: 4/18/2017 8:07:30 PM EDT
[#30]
Quote HistoryQuoted:
Well... the MG42 is an old machine gun and back then the Germans added a high chocolate content to the chemical make-up of the steel and, well, you know what happens to a chocolate bar when you keep it in your pocket too long... Recent advancements in candy coating technology protects the chocolate in the steel from melting away under the heat produced by longer sustained rates of fire... so it's not as much of a concern now. |
|
|
|
Posted: 4/18/2017 8:10:36 PM EDT
[#31]
how is riffle formed? How barl get damage? They need to do way instain barl> who kill thier barls. becuse these barl cant frigth back?
|
|
|
|
Posted: 4/19/2017 6:30:07 AM EDT
[#32]
Quote HistoryQuoted:
how is riffle formed? How barl get damage? They need to do way instain barl> who kill thier barls. becuse these barl cant frigth back? ...he gets it! |
|
|
|
Posted: 4/19/2017 6:36:42 AM EDT
[#33]
-Be me
-First deployment -Private medic with infantry platoon. -Camping with guns, waiting for the terrorists to attack. -Squad leader tells saw gunner, "test fire your SAW, 6-9 round burst" -BRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRT -Squad leader "WHAT THE FUCK ARE YOU DOING?!!!" -Saw Gunner "I thought you said test fire, 69 round burst" -Face Palm -Laughing -Hazing
-Good times. |
|
|
|
Posted: 4/19/2017 7:05:22 AM EDT
[#34]
Quote HistoryQuoted:
Then you can shoot around corners! Quote HistoryQuoted:
Quoted:
Steel under load starts to bend when it is not all that hot. At an intense red glow in the middle of a 36 inch long 1/2 inch diameter drill rod and it will bend to 90 degrees under its own weight. Rifling? We don't need no damn rifling. IIRC it was strawberry flavor so they had something cool to suck on if it got hot inside the tank. |
|
|
|
Posted: 4/19/2017 7:35:39 AM EDT
[#35]
Quote HistoryQuoted:
The two you mentioned are the only American Barrels with refractory lining. The M240 and m249 are just plain chrome lined steel. USO makes a Stellite lined m240 barrel for foreign/commercial sales, and the Army has several programs to make a refractory lined M240 barrel, as well as improved M2 barrels. Quote HistoryQuoted:
Quoted:
If I remember right, those German barrels are rifled steel, which is different from the M60, M2 and later MG's have stellite liners and are not going to be affected the same. USO makes a Stellite lined m240 barrel for foreign/commercial sales, and the Army has several programs to make a refractory lined M240 barrel, as well as improved M2 barrels. |
|
|
|
Posted: 4/19/2017 7:55:22 AM EDT
[#36]
Quote HistoryQuoted:
Actually more like 17 years back to 2000. While I've shot a lot of AR and other semi-auto rifles I've never been a machine gunner and I am not a metallurgist. I know the heat damages the barrel but I was interested in the mechanics of how barrel becomes damaged from heat. Watching at video of an M-16 shooting many rounds until it blows the barrel explains a lot. In the video of the MG42 I believe they said they usually carried 4 spare barrels and would normally change the barrel every 120 rounds or something like that. The whole concept was to switch/rotate the barrel frequently to not allow the barrel to get too hot as it would damage the barrel and also cause malfunctions. So your barrel gets red hot, and a bullet is squeezed through the red hot rifling at a high rate of speed? What happens to the rifling? |
|
|
|
Posted: 4/19/2017 9:26:39 AM EDT
[#37]
.
 Attached File... |
|
|
|
Posted: 4/19/2017 10:14:21 AM EDT
[#38]
Quote HistoryQuoted:
M1919A4 had stellite lined barrels. But I didn't mention them since they've been long retired. |
|
|
|
Posted: 4/19/2017 12:11:55 PM EDT
[#39]
I know from personal experience that blanks, when fired cyclic, will melt a bfa to a 240 barrel.
|
|
|
|
Posted: 4/19/2017 1:18:22 PM EDT
[#40]
 Best M60 Video - Continuous Fire |
|
|
|
Posted: 4/19/2017 10:13:41 PM EDT
[#41]
Quote HistoryQuoted:
So did the A6. The A6 barrels were actually stellite lined first right at the end of WWII. They didn't start making lined A4 barrels until the 50s. But I didn't mention them since they've been long retired. Quote HistoryQuoted:
Quoted:
M1919A4 had stellite lined barrels. But I didn't mention them since they've been long retired. |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
