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Hillbilly223
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Posted: 1/18/2011 12:33:20 AM
What is the proper way to break-in a Chrome lined AR barrel, 1/7 twist?
therealcarbine15
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Posted: 1/18/2011 12:38:07 AM
Shoot it and watch where it hits (note any key holing or wandering zeros) and take note of malfunctions (if any). Examine the brass. After a couple hundred rounds it's broken in.
Quentin
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Posted: 1/18/2011 12:38:51 AM
Check the bore, run a patch down it to clean out any gunk from the factory, then shoot.
therealcarbine15
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Posted: 1/18/2011 12:48:36 AM
Originally Posted By Quentin:
Check the bore, run a patch down it to clean out any gunk from the factory, then shoot.


oh ,yeah. Forgot that step. Actually looking down the bore can be helpful too. I saw metal shavings in a new chrome lined barrel that could have scratched the rifling on their way out with the first shots. A brass brush took care of them.
chadwick76
What?.....Who?........A F---ing democrat??????????
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Posted: 1/18/2011 12:53:15 AM
i like to have a boresnake handy to run down the barrel every 20 rds oir so for the first 100.
"God made man, but Samual Colt made them equal". colt manu.
Cdenmark
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Posted: 1/18/2011 1:03:04 AM
[Last Edit: 1/21/2011 6:03:01 AM by Cdenmark]
Follow manufactures recomendations. As stated function test, clean first, then shoot. Hard chromed is a little different than stainless steel or chrome moly. Put a little heat in it maybe a 20 round mag while you sight it in, run a couple of patches through it wet, while it cools down, and repeat a few cycles. Run the internals wet with CLP or LSA and let everything seat in nicely (BCG). Keep it well lubed but don't go overboard. There is a hole for oiling the gas rings. Most all quality rifles are pre-tested from factory unless it's a DIY. 1-7 twist is a little fast so lube will extend it's life but hard chrome will probably out live most of us. Have fun.
reelserious
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Posted: 1/18/2011 9:11:19 AM
Originally Posted By Quentin:
Check the bore, run a patch down it to clean out any gunk from the factory, then shoot.





This.


Chrome for the win.
JBnTX
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Posted: 1/18/2011 10:01:07 AM
[Last Edit: 1/18/2011 10:03:01 AM by JBnTX]
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.
NCHornet
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Posted: 1/18/2011 12:46:32 PM
[Last Edit: 1/18/2011 12:46:59 PM by NCHornet]
WMurderface
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Posted: 1/18/2011 12:48:03 PM

Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.

This...

Shoot it
Rebel souls, deserters we are called
Chose a gun, and threw away the sun
Speedgun
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Posted: 1/18/2011 12:54:16 PM
Originally Posted By WMurderface:

Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.

This...

Shoot it


Again...this. Shoot and enjoy.

"Problem Employee"
Hillbilly223
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Posted: 1/20/2011 8:32:37 PM
Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.


Then call me Myth Buster!
I shot 5rds and cleaned the bore 20 times (100rds) and then shot groups, 5 - 5 shot groups at 250yds largest was 1inch, smallest was 3/4 inch with 69gr SMK over Benchmark from Winchester brass.
acman145acp
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Posted: 1/20/2011 8:42:43 PM

Originally Posted By Hillbilly223:
Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.


Then call me Myth Buster!
I shot 5rds and cleaned the bore 20 times (100rds) and then shot groups, 5 - 5 shot groups at 250yds largest was 1inch, smallest was 3/4 inch with 69gr SMK over Benchmark from Winchester brass.

Do that in front of another arfcom team member someone who's been around more than a day. I'll be compelled to buy you a team membership.
I only use my guns when kindness fails
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My life is a drunken poets dream

The bottom line is that the absolutely exact value of pi cannot be computed.
Raizo_Sekai
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Posted: 1/20/2011 9:31:35 PM
[Last Edit: 1/20/2011 9:36:01 PM by Raizo_Sekai]
Originally Posted By acman145acp:

Originally Posted By Hillbilly223:
Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.


Then call me Myth Buster!
I shot 5rds and cleaned the bore 20 times (100rds) and then shot groups, 5 - 5 shot groups at 250yds largest was 1inch, smallest was 3/4 inch with 69gr SMK over Benchmark from Winchester brass.

Do that in front of another arfcom team member someone who's been around more than a day. I'll be compelled to buy you a team membership.


Would also like to see this
pun
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Posted: 1/20/2011 9:35:36 PM
Chromelined barrels dont need breaking in.
aardvark_ratnick
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Posted: 1/20/2011 9:35:41 PM
Chrome lined barrels are not for shooting groups, they are for shooting faces.
GHPorter
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Posted: 1/20/2011 10:31:59 PM
Any barrel that truly needs breaking in is not properly finished. The difference between a barrel that is "seasoned" by a few very slow shots and extra-heavy, obsessively frequent cleaning and one that is "just shot" in an AR-15 is lost in the variability of the rest, the shooter, the optic, and the conditions. There is, however, a major problem in demonstrating this definitively: no two barrels, no matter how carefully matched they are in production, will respond identically. They'll be close, but they won't be identical. So there is no real way to do a scientifically controlled test with one barrel "broken in" and another "just shot" that has any real validity for comparison.

A brand new GI rifle (which will of course has a brand new chrome lined barrel) will go right onto the rack, and the rifle will be fired. No break in is required.
"--you can't conquer a free man; the most you can do is kill him."
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pun
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Posted: 1/20/2011 11:35:38 PM
I remember seeing history channel with the FN factory making full size rifles not only were new rifles test fired they ran them brand new on full auto right off the line before being shipped out...no break in procedure there.
homedefender83
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Posted: 1/21/2011 1:55:05 AM
[Last Edit: 1/21/2011 11:16:33 AM by Zhukov]
<Inflammatory comment removed - Z>
MIDGAPATRIOT
END THE FED!!!!!!!
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Posted: 1/21/2011 4:44:07 AM
Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.


None are more hopelessly enslaved than those who falsely believe they are free.
-Johann Wolfgang von Goethe

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
-H. L. Mencken
DM1975
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Posted: 1/21/2011 8:35:15 AM
Just clean it an shoot it. If it makes you feel better to do a break in procedure... or dance around it under a full moon shaking a bag of chicken bones over it or whatever other type of voodoo magic you like then go for it. Just think how fast a barrel would shoot out and be a smooth bore if a couple hundred rounds or less actually did anything to that barrel worth noticing?
YAY! I got an Army Tank
hellbound
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Posted: 1/21/2011 8:38:47 AM
Originally Posted By DM1975:
Just clean it an shoot it. If it makes you feel better to do a break in procedure... or dance around it under a full moon shaking a bag of chicken bones over it or whatever other type of voodoo magic you like then go for it. Just think how fast a barrel would shoot out and be a smooth bore if a couple hundred rounds or less actually did anything to that barrel worth noticing?


Holy shit.
And I looked, and behold a pale horse and his name that sat on him was Death, and Hell[bound] followed with him.
Doc_Hurley
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Posted: 1/21/2011 9:07:34 AM
Shoot it til it breaks, repair, repeat as necessary.
Market_Garden
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Posted: 1/21/2011 9:11:42 AM
[Last Edit: 1/21/2011 11:17:08 AM by Zhukov]
<Inflammatory comment removed - Z>
DM1975
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Posted: 1/21/2011 9:20:52 AM
Originally Posted By Hillbilly223:
Originally Posted By JBnTX:
Just shoot it!

It's a 900 dollar combat weapon, not a 3000 dollar finely tuned precision target rifle.

Breaking in barrels is a myth.


Then call me Myth Buster!
I shot 5rds and cleaned the bore 20 times (100rds) and then shot groups, 5 - 5 shot groups at 250yds largest was 1inch, smallest was 3/4 inch with 69gr SMK over Benchmark from Winchester brass.


What did it shoot for groups out of the box? Probably the same exact super groups you are posting about after your break in.

BW, I have a 5.56mm ball point pen that will shoot better than that, just don't look when I go out to check the target.
YAY! I got an Army Tank
Elijah1
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Posted: 1/21/2011 10:26:27 AM
Originally Posted By Quentin:
Check the bore, run a patch down it to clean out any gunk from the factory, then shoot.


Then...
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