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1/14/2017 8:11:35 PM
Posted: 1/17/2011 7:33:20 PM EST
What is the proper way to break-in a Chrome lined AR barrel, 1/7 twist?
Link Posted: 1/17/2011 7:38:07 PM EST
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.
Link Posted: 1/17/2011 7:38:51 PM EST
Check the bore, run a patch down it to clean out any gunk from the factory, then shoot.
Link Posted: 1/17/2011 7:48:36 PM EST
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.
Link Posted: 1/17/2011 7:53:15 PM EST
i like to have a boresnake handy to run down the barrel every 20 rds oir so for the first 100.
Link Posted: 1/17/2011 8:03:04 PM EST
[Last Edit: 1/21/2011 1:03:01 AM EST 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.
Link Posted: 1/18/2011 4:11:19 AM EST
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.
Link Posted: 1/18/2011 5:01:07 AM EST
[Last Edit: 1/18/2011 5:03:01 AM EST 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.
Link Posted: 1/18/2011 7:46:32 AM EST
[Last Edit: 1/18/2011 7:46:59 AM EST by NCHornet]
Link Posted: 1/18/2011 7:48:03 AM EST

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
Link Posted: 1/18/2011 7:54:16 AM EST
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.

Link Posted: 1/20/2011 3:32:37 PM EST
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.
Link Posted: 1/20/2011 3:42:43 PM EST

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.
Link Posted: 1/20/2011 4:31:35 PM EST
[Last Edit: 1/20/2011 4:36:01 PM EST 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
Link Posted: 1/20/2011 4:35:36 PM EST
Chromelined barrels dont need breaking in.
Link Posted: 1/20/2011 4:35:41 PM EST
Chrome lined barrels are not for shooting groups, they are for shooting faces.
Link Posted: 1/20/2011 5:31:59 PM EST
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.
Link Posted: 1/20/2011 6:35:38 PM EST
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.
Link Posted: 1/20/2011 8:55:05 PM EST
[Last Edit: 1/21/2011 6:16:33 AM EST by Zhukov]
<Inflammatory comment removed - Z>
Link Posted: 1/20/2011 11:44:07 PM EST
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.


Link Posted: 1/21/2011 3:35:15 AM EST
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?
Link Posted: 1/21/2011 3:38:47 AM EST
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.
Link Posted: 1/21/2011 4:07:34 AM EST
Shoot it til it breaks, repair, repeat as necessary.
Link Posted: 1/21/2011 4:11:42 AM EST
[Last Edit: 1/21/2011 6:17:08 AM EST by Zhukov]
<Inflammatory comment removed - Z>
Link Posted: 1/21/2011 4:20:52 AM EST
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.
Link Posted: 1/21/2011 5:26:27 AM EST
Originally Posted By Quentin:
Check the bore, run a patch down it to clean out any gunk from the factory, then shoot.


Then...
Link Posted: 1/21/2011 6:07:28 AM EST
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.


so you shoot your CL barrel more accurately than a krieger or douglas barrel from a bench rest. Let me guess, your also a marine sniper? Go shoot 100yd 10 shot groups and post pics. No powder burns on the paper either, dude.

but yea, no break in.
Link Posted: 1/21/2011 6:16:06 AM EST
Link Posted: 1/21/2011 6:48:59 AM EST
Originally Posted 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


Heck,I'll buy him a extra gold,platinum-plated super secret BOTD multiple lifetime nembership!

JK! Would like to see that,though.
Link Posted: 1/21/2011 6:50:53 AM EST
Originally Posted By aardvark_ratnick:
Chrome lined barrels are not for shooting groups, they are for shooting faces.


Love it!

I agree.
Link Posted: 1/21/2011 8:19:24 AM EST
[Last Edit: 1/21/2011 8:20:55 AM EST by Marksman14]
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.


Where do I start.

Its a chrome bore. Clean out whatever the factory left in there, and enjoy a nice 30 round magazine dump. Its broken in, now you can enjoy it.
Link Posted: 1/21/2011 10:13:06 AM EST
When I break in a rack grade M4
Im breaking in the parts
Im shooting several types of ammo , seeing if theres any problems


I would treat a 500$ Match Grade SS barrel different

Link Posted: 1/27/2011 8:52:50 AM EST
[Last Edit: 1/27/2011 9:13:08 AM EST by Zhukov]
<Off-topic comment removed - Z>

<You can disagree, but do it in a respectful manner - Z>
Link Posted: 1/27/2011 9:12:17 AM EST
[Last Edit: 1/27/2011 9:12:37 AM EST by Zhukov]
<Off-topic comment removed - Z>
Link Posted: 1/27/2011 9:18:37 AM EST
[Last Edit: 1/27/2011 9:18:37 AM EST by VA-gunnut]
OP won't be returning to play with us.
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