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[ARCHIVED THREAD] - Would this "ruin" a barrel? BCM

Posted: 1/14/2019 10:37:04 AM EDT

How bad would it be to shoot 550 rounds through a brand-new 14.5" BCM upper within 7-8 minutes?

BRAND NEW. Just lubed and then had mag after mag poured through it indiscriminately. I have an overzealous friend, sorry, no video.

I'll have to see if it shoots worth a poo (accuracy-wise) next time we're out.

What do you think? Of course it still functioned fine, just wondering how much its accuracy potential has been curtailed.

ETA: 100% Wolf Gold.

Posted: 1/14/2019 10:40:23 AM EDT

[#1]

Probably fine.

Posted: 1/14/2019 10:49:57 AM EDT

[#2]

Quoted:
How bad would it be to shoot 550 rounds through a brand-new 14.5" BCM upper within 7-8 minutes?

BRAND NEW. Just lubed and then had mag after mag poured through it indiscriminately. I have an overzealous friend, sorry, no video.

I'll have to see if it shoots worth a poo (accuracy-wise) next time we're out.

What do you think? Of course it still functioned fine, just wondering how much its accuracy potential has been curtailed.

ETA: 100% Wolf Gold.

View Quote

Bumpfired/Automatic ... or just dumping mags quickly? The barrel is likely OK; being "new" doesn't really make much of a difference. But it might be worth it to check out the gas tube and BCG very thoroughly.

Posted: 1/14/2019 10:59:05 AM EDT

[#3]

Quote History

Quoted:

Bumpfired/Automatic ... or just dumping mags quickly? The barrel is likely OK; being "new" doesn't really make much of a difference. But it might be worth it to check out the gas tube and BCG very thoroughly.

View Quote

This. I have a friend who has never broken in a single barrel out of 20+ ar's and 1000's of rounds. He can pick any of them and still be more accurate than I ever will.

Posted: 1/14/2019 10:59:08 AM EDT

[#4]

Hurt your wallet in ammo is about all imho

Posted: 1/14/2019 10:59:18 AM EDT

[#5]

I cannot fathom any way that would cause any harm.

Posted: 1/14/2019 11:02:48 AM EDT

[#6]

Wear gloves. You're gonna need them.

Posted: 1/14/2019 11:04:30 AM EDT

[#7]

Just getting it warmed up. Throw some lube at it and get busy.

Posted: 1/14/2019 11:11:57 AM EDT

[#8]

Chrome lined can handle any semi auto rate of fire

Posted: 1/14/2019 11:41:03 AM EDT

[#9]

lol

Posted: 1/14/2019 11:48:15 AM EDT

[#10]

Should be fine, being chrome lined especially.

Posted: 1/14/2019 11:48:23 AM EDT

[#11]

It will be totally FUBAR.

In fact, its FUBAR already. Send to me for proper HAZMAT disposal.

Posted: 1/14/2019 12:17:09 PM EDT

[#12]

The hotter the chrome the quicker it will wear.
The barrel is probably OK but getting a barrel that hot is asking for premature throat erosion and excessive wear. I would never get a barrel that hot.

Posted: 1/14/2019 12:34:16 PM EDT

[#13]

As mentioned above, you probably have some premature wear that you wouldn't normally see untjl much later with a more relaxed firing schedule, but it's not ruined. Just don't make it a habit.

Posted: 1/14/2019 12:41:26 PM EDT

[#14]

Define ruin.

Your barrel needs a thorough cleaning with Sweet's or Kroil/JB Bore Polish now. High temperatures are the enemy of every barrel, your's is no exception.

The hotter metal gets the more malleable it becomes. Your friend's abuse was likely equal to shooting 3/4 thousand bullets the normal way.

The fastest I will shoot my blaster rifles is as fast as can I shoot and hit everything I'm aiming at. It's fast. Very fast. But ten to twenty rounds and I'm done. I'll let that rifle sit and cool while I paste targets or paint plates.

Accurate aimed fire wins fire fights.

Posted: 1/14/2019 12:53:53 PM EDT

[#15]

Quote History

Quoted:Accurate aimed fire wins fire fights.

View Quote

But full auto keeps their head down while you advance.

Posted: 1/14/2019 1:06:55 PM EDT

[#16]

Mag dumps, smoking barrels and full auto are fun and barrels are wear parts.

Send it

Posted: 1/14/2019 1:18:33 PM EDT

[#17]

Ruining your gun by treating it like a gun? Doubt it.

Posted: 1/14/2019 1:57:33 PM EDT

[#18]

Quote History

Quoted:

Bumpfired/Automatic ... or just dumping mags quickly? The barrel is likely OK; being "new" doesn't really make much of a difference. But it might be worth it to check out the gas tube and BCG very thoroughly.

View Quote

Dumping mags in a hurry. It was a BCM BCG but I'll let him know. Many thanks.

Posted: 1/14/2019 2:00:39 PM EDT

[#19]

Thanks for the replies, fellas. By the consensus, this ones OK, but I wonder ignored there'd be any more appreciable difference in a non-chromed barrel?

Also, perhaps "ruined" was the wrong word; I really was more curious about excessive premature wear.

Thanks again for the replies.

Cheers.

Posted: 1/14/2019 2:07:28 PM EDT

[#20]

[laughs in filthy 14]

Posted: 1/14/2019 2:21:12 PM EDT

[#21]

Probably didn't do the throat any favors. Definitely would have caused more erosion than the same number of rounds fired over an hour or two.

I wouldn't do that to a rifle that I put together strictly for precision use. But for a general use rifle for carbine matches, range fun, coyote hunting... etc It wouldn't bother me too much.

Barrels wear out and then need to be replaced. It's like putting new tires on a truck. Doing burnouts is hard on tires.

I doubt what your friend did will have any noticeable effect on accuracy. Just used up some of the finite life of your barrel.

Posted: 1/14/2019 4:01:24 PM EDT

[#22]

Buy a throat erosion gage. New bbls will typically read .1" to .15" (US Military considers it needs a new barrel when the gage reads 1"). You'll be able to see how near new it is, plus will be able to monitor throat wear as you shoot it more. Also good for reading used bbls in case one is offered to you. Fun to keep records on.

FWIW, here's a few measuring results:

41V50 bbl with no chrome or nitride of the bore, slow fire - 0 rounds = .15; after 984 rounds = .175

Model 1 Sales 16" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1204 rounds

Model 1 Sales 11.5" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1839 rounds

FN CHF CMV steel w/chrome lining, slow fire = no measurable wear after 1136 rounds

FN CHF CMV steel w/chrome lining = no measurable wear after 736 rounds (166 rounds fired rapidly with remaining slow fired)

Daniel Defense CHF CMV steel w/chrome lining, slow fire = no measurable wear after 2369 rounds

4140 w/chrome lining, slow fire = no measurable wear after 612 rounds

PSA 41V50 nitrided slow fire - 0 rounds = .1; 386 rounds = .125

Slow fire = 5-10 shots and let cool to ambient temp using a fan or Caldwell AR bbl cooler.

Hmm...anyone seeing a trend that chrome lining wears slower so far?

Posted: 1/14/2019 4:05:12 PM EDT

[#23]

Quote History

Quoted:
Buy a throat erosion gage. New bbls will typically read .1" to .15" (US Military considers it needs a new barrel when the gage reads 1"). You'll be able to see how near new it is, plus will be able to monitor throat wear as you shoot it more. Also good for reading used bbls in case one is offered to you. Fun to keep records on.

FWIW, here's a few measuring results:

41V50 bbl with no chrome or nitride of the bore, slow fire - 0 rounds = .15; after 984 rounds = .175

Model 1 Sales 16" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1204 rounds

Model 1 Sales 11.5" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1839 rounds

FN CHF CMV steel w/chrome lining, slow fire = no measurable wear after 1136 rounds

FN CHF CMV steel w/chrome lining = no measurable wear after 736 rounds (166 rounds fired rapidly with remaining slow fired)

Daniel Defense CHF CMV steel w/chrome lining, slow fire = no measurable wear after 2369 rounds

4140 w/chrome lining, slow fire = no measurable wear after 612 rounds

PSA 41V50 nitrided slow fire - 0 rounds = .1; 386 rounds = .125

Slow fire = 5-10 shots and let cool to ambient temp using a fan or Caldwell AR bbl cooler.

Hmm...anyone seeing a trend that chrome lining wears slower so far?

View Quote

awesome information.

Posted: 1/14/2019 5:06:40 PM EDT

[#24]

Quote History

Quoted:
Buy a throat erosion gage. New bbls will typically read .1" to .15" (US Military considers it needs a new barrel when the gage reads 1"). You'll be able to see how near new it is, plus will be able to monitor throat wear as you shoot it more. Also good for reading used bbls in case one is offered to you. Fun to keep records on.

FWIW, here's a few measuring results:

41V50 bbl with no chrome or nitride of the bore, slow fire - 0 rounds = .15; after 984 rounds = .175

Model 1 Sales 16" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1204 rounds

Model 1 Sales 11.5" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1839 rounds

FN CHF CMV steel w/chrome lining, slow fire = no measurable wear after 1136 rounds

FN CHF CMV steel w/chrome lining = no measurable wear after 736 rounds (166 rounds fired rapidly with remaining slow fired)

Daniel Defense CHF CMV steel w/chrome lining, slow fire = no measurable wear after 2369 rounds

4140 w/chrome lining, slow fire = no measurable wear after 612 rounds

PSA 41V50 nitrided slow fire - 0 rounds = .1; 386 rounds = .125

Slow fire = 5-10 shots and let cool to ambient temp using a fan or Caldwell AR bbl cooler.

Hmm...anyone seeing a trend that chrome lining wears slower so far?

View Quote

...and just like that, I never bought another barrel without it.

Posted: 1/14/2019 5:44:47 PM EDT

[#25]

Quoted:
How bad would it be to shoot 550 rounds through a brand-new 14.5" BCM upper within 7-8 minutes?

BRAND NEW. Just lubed and then had mag after mag poured through it indiscriminately. I have an overzealous friend, sorry, no video.

I'll have to see if it shoots worth a poo (accuracy-wise) next time we're out.

What do you think? Of course it still functioned fine, just wondering how much its accuracy potential has been curtailed.

ETA: 100% Wolf Gold.

View Quote

550 / 7 = 78.5 rounds per minute. What is the stated spec from the military?

Posted: 1/14/2019 8:34:10 PM EDT

[#26]

you may have to dig a bunch of jacket fouling out of the grooves......

Posted: 1/14/2019 8:45:45 PM EDT

[#27]

Quote History

Quoted:
Buy a throat erosion gage. New bbls will typically read .1" to .15" (US Military considers it needs a new barrel when the gage reads 1"). You'll be able to see how near new it is, plus will be able to monitor throat wear as you shoot it more. Also good for reading used bbls in case one is offered to you. Fun to keep records on.

FWIW, here's a few measuring results:

41V50 bbl with no chrome or nitride of the bore, slow fire - 0 rounds = .15; after 984 rounds = .175

Model 1 Sales 16" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1204 rounds

Model 1 Sales 11.5" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1839 rounds

FN CHF CMV steel w/chrome lining, slow fire = no measurable wear after 1136 rounds

FN CHF CMV steel w/chrome lining = no measurable wear after 736 rounds (166 rounds fired rapidly with remaining slow fired)

Daniel Defense CHF CMV steel w/chrome lining, slow fire = no measurable wear after 2369 rounds

4140 w/chrome lining, slow fire = no measurable wear after 612 rounds

PSA 41V50 nitrided slow fire - 0 rounds = .1; 386 rounds = .125

Slow fire = 5-10 shots and let cool to ambient temp using a fan or Caldwell AR bbl cooler.

Hmm...anyone seeing a trend that chrome lining wears slower so far?

View Quote

Nice! Real tech info

Posted: 1/14/2019 9:14:41 PM EDT

[#28]

Quote History

Quoted:
you may have to dig a bunch of jacket fouling out of the grooves......

View Quote

I just may. Thanks, Dave! I still dig your FAN articles. You're the only reason I subscribe.

@gunwritr

Posted: 1/14/2019 9:49:12 PM EDT

[#29]

Quote History

Quoted:

I just may. Thanks, Dave! I still dig your FAN articles. You're the only reason I subscribe.

@gunwritr

View Quote

Glad to add some info!

during high round count testing I have seen barrels with so much jacket fouling in the
grooves that they were key holing. Laboriously scrub all the jacket fouling out and
they shoot accurately again....

Posted: 1/14/2019 10:05:56 PM EDT

[#30]

Quoted:
How bad would it be to shoot 550 rounds through a brand-new 14.5" BCM upper within 7-8 minutes?

BRAND NEW. Just lubed and then had mag after mag poured through it indiscriminately. I have an overzealous friend, sorry, no video.

I'll have to see if it shoots worth a poo (accuracy-wise) next time we're out.

What do you think? Of course it still functioned fine, just wondering how much its accuracy potential has been curtailed.

ETA: 100% Wolf Gold.

View Quote

If it's your barrel on your gun I'd find a new friend. If it's his gun; shake your head and walk away. It's his gun.

kwg

Posted: 1/14/2019 10:10:10 PM EDT

[#31]

Barrel should be fine... if there was a suppressor on the other hand... take a look at the baffle wear thread

Posted: 1/15/2019 9:05:47 AM EDT

[#32]

Quote History

Quoted:
Buy a throat erosion gage. New bbls will typically read .1" to .15" (US Military considers it needs a new barrel when the gage reads 1"). You'll be able to see how near new it is, plus will be able to monitor throat wear as you shoot it more. Also good for reading used bbls in case one is offered to you. Fun to keep records on.

FWIW, here's a few measuring results:

41V50 bbl with no chrome or nitride of the bore, slow fire - 0 rounds = .15; after 984 rounds = .175

Model 1 Sales 16" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1204 rounds

Model 1 Sales 11.5" 4140 w/chrome lining, full auto, but let cool some after each mag = no measurable wear in 1839 rounds

FN CHF CMV steel w/chrome lining, slow fire = no measurable wear after 1136 rounds

FN CHF CMV steel w/chrome lining = no measurable wear after 736 rounds (166 rounds fired rapidly with remaining slow fired)

Daniel Defense CHF CMV steel w/chrome lining, slow fire = no measurable wear after 2369 rounds

4140 w/chrome lining, slow fire = no measurable wear after 612 rounds

PSA 41V50 nitrided slow fire - 0 rounds = .1; 386 rounds = .125

Slow fire = 5-10 shots and let cool to ambient temp using a fan or Caldwell AR bbl cooler.

Hmm...anyone seeing a trend that chrome lining wears slower so far?

View Quote

No measurable wear after 1,839 full auto rounds

. ''Measurable'' and ''let cool some after each mag'', make this deceiving.
Firing 1,839 rounds in continued full auto would surely damage or more likely ruin a barrel. ''Cooling between mags'' is not the same as continued fire and the heat it produces. You're really only testing 30 rounds of continuous full auto at a time, not 1,839, in this situation.

Posted: 1/15/2019 9:08:47 AM EDT

[#33]

Quote History

Quoted:

If it's your barrel on your gun I'd find a new friend. If it's his gun; shake your head and walk away. It's his gun.

kwg

View Quote

This haha. It may not ruin your barrel but it will ruin 550 rounds of ammunition

Posted: 1/15/2019 9:31:01 AM EDT

[#34]

Quote History

Quoted:
This haha. It may not ruin your barrel but it will ruin 550 rounds of ammunition

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:

If it's your barrel on your gun I'd find a new friend. If it's his gun; shake your head and walk away. It's his gun.

kwg

This haha. It may not ruin your barrel but it will ruin 550 rounds of ammunition

Well, I mighta had a hand in this nonsense; who turns down free ammo?! Hell, I might see if he'd like tic do it again. "Why not use up the whole case?"

Posted: 1/15/2019 10:00:04 AM EDT

[#35]

Get a B-GRF trigger and bumpfire the hell out of it.

[ARCHIVED THREAD] - Would this "ruin" a barrel? BCM

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