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9/22/2017 12:11:25 AM
Posted: 11/20/2003 11:01:07 PM EDT
What is the expected life of your average AR barrel?

I have both 16 and 20"
Link Posted: 11/21/2003 2:30:47 AM EDT
15-20,000 rounds is a fairly decent figure. Less from a "chrome-moly" barrel. More from a "chrome-lined" barrel. Mike
Link Posted: 11/21/2003 5:28:10 PM EDT
Thanks!
Link Posted: 11/21/2003 5:44:01 PM EDT
It also depends on the rate of fire. If you're a slow fire target shooter it'll last longer than if you're a bump-firing Jack off! I have an article from one of the gun rags, where the author ran 10,000 rounds of PMC thru a colt ar15. The barrel was key holing by the end of the test. I can't remember if it was a chrome lined barrel, however.
Link Posted: 11/21/2003 6:21:51 PM EDT
Im up to 17,000+ in my HBAR 14.5 Bushmaster and its still grouping the same as it did when it was new.Im getting 2 to 21/2" off hand and 1 to 1 1/2" scoped at 100 yds.
Link Posted: 11/21/2003 7:55:37 PM EDT
Originally Posted By markm: It also depends on the rate of fire. If you're a slow fire target shooter it'll last longer than if you're a bump-firing Jack off!
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Mostly slower aimed fire. I do hope to get the Bushy into a carbine course, though.
Link Posted: 11/21/2003 9:53:53 PM EDT
Link Posted: 11/22/2003 12:01:50 AM EDT
Originally Posted By Troy:
Originally Posted By markm: I have an article from one of the gun rags, where the author ran 10,000 rounds of PMC thru a colt ar15. The barrel was key holing by the end of the test. I can't remember if it was a chrome lined barrel, however.
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The speed at which he ran those rounds through the gun also played a factor, as you mentioned. It's very unlikely that the author of that article kept below the 15-rounds-per-minute sustained fire rate, and the constant extreme heat on the barrel, especially the throat, definitely lead to accelerated barrel wear. -Troy
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Absolutely right! The gun was a colt match hbar. The ammo was pmc 55 gr fmj listed at 3195fps, and the shooting was done in 2 1/2 days in increments of 1000 rounds. The article is still available at GalleryOfGuns.com under "gun reviews".
Link Posted: 11/22/2003 4:46:27 AM EDT
[url]www.galleryofguns.com/shootingtimes/Articles/DisplayArticles.asp?ID=1205[/url]
Link Posted: 11/22/2003 5:28:27 AM EDT
Originally Posted By model927: Im up to 17,000+ in my HBAR 14.5 Bushmaster and its still grouping the same as it did when it was new.Im getting 2 to 21/2" off hand and 1 to 1 1/2" scoped at 100 yds.
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2 to 2.5 inches offhand at 100yards? That sounds really tight. So What do you use for targets? I mean, anything over 2 inches isn't really a challenge if you can group that well. Golf balls? Clay birds at 200yards in the offhand position sounds like a good target for you. Not calling BS, but if you can get groups of 2 to 2.5 inches ar 100 yards in the offhand postition, you can probably shoot june bugs with regularity at 50 yards offhand.
Link Posted: 11/22/2003 7:34:42 AM EDT
Originally Posted By 123whisper:
Originally Posted By model927: Im up to 17,000+ in my HBAR 14.5 Bushmaster and its still grouping the same as it did when it was new.Im getting 2 to 21/2" off hand and 1 to 1 1/2" scoped at 100 yds.
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2 to 2.5 inches offhand at 100yards? That sounds really tight. So What do you use for targets? I mean, anything over 2 inches isn't really a challenge if you can group that well. Golf balls? Clay birds at 200yards in the offhand position sounds like a good target for you. Not calling BS, but if you can get groups of 2 to 2.5 inches ar 100 yards in the offhand postition, you can probably shoot june bugs with regularity at 50 yards offhand.
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On a very good day, I can hold a dime size group at 25yrds. Most days I'm safe inside a 1/2 dollar-25yrds. 20" 1/7 Colt MT using Q3131A off hand only. At 100yrds I'll never see 2.5" groups! WOW [:O]
Link Posted: 11/22/2003 7:41:54 AM EDT
Originally Posted By Branspop: What is the expected life of your average AR barrel? I have both 16 and 20"
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Branspop, no one can you give you an accurate number of rounds a barrel can fire. FAR too many variables and members above have mentioned most of them. [b]Your barrel life is at the end when accuracy fails to meet your personal specifications.[/b] I know that's not a precise answer but there is no precise answer. 5sub
Link Posted: 11/22/2003 8:09:07 AM EDT
[Last Edit: 11/22/2003 8:14:24 AM EDT by 123whisper]
Originally Posted By GoldtopDude:
Originally Posted By 123whisper:
Originally Posted By model927: Im up to 17,000+ in my HBAR 14.5 Bushmaster and its still grouping the same as it did when it was new.Im getting 2 to 21/2" off hand and 1 to 1 1/2" scoped at 100 yds.
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2 to 2.5 inches offhand at 100yards? That sounds really tight. So What do you use for targets? I mean, anything over 2 inches isn't really a challenge if you can group that well. Golf balls? Clay birds at 200yards in the offhand position sounds like a good target for you. Not calling BS, but if you can get groups of 2 to 2.5 inches ar 100 yards in the offhand postition, you can probably shoot june bugs with regularity at 50 yards offhand.
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On a very good day, I can hold a dime size group at 25yrds. Most days I'm safe inside a 1/2 dollar-25yrds. 20" 1/7 Colt MT using Q3131A off hand only. At 100yrds I'll never see 2.5" groups! WOW [:O]
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My best group offhand was about a 2 and a quarter inch group offhand at 50 yards with a CMP Remington smallbore. IT scored out to be 90-X. They aren't free floated, nor are their triggers good, but those Remingtons can shoot. The trigger is crisp and don't have much overtravel nor take-up but it is heavy. My uncle has one that I need to pressure into getting the cheek piece sanded down and the trigger put to about 3.5 lbs. Then it would really start letting me shoot well. I never have done expert. Closest I have ever been was 346 and expert is 356 and you have to do it 3 times. Getting a bunch of ammo to shoot for grouping would probably help 5-6 points. I have just been using the CMP Winchester that the club gives me and I have no idea how it groups off a bench.I know one older guy that everyone regards as an excellent rifle shooter, and he has never quite gotten expert either, and he says that I will get it in the next couple of years. That makes me feel very proud.
Link Posted: 11/22/2003 10:23:23 AM EDT
[Last Edit: 11/22/2003 10:26:03 AM EDT by model927]
I do it usin black hills match grade ammo and plenty of practice.I have an HBAR on all my ARs and a lot of practice.This is also in excellent weather not too hot and plenty of sun on a standard 100 yd target.I also go through a case and a half of rifle ammo a month and have been burning up that much ammo the last 5 years.My shooting didnt get that way over night.Its also easier to group like that when all I used to shoot is my M1A in the usual CMP standing posistion.If I use both eyes open and a combat stance firing quicker the groups open up to 31/2 to 4"I should have been clearer on the shooting style.
Link Posted: 11/22/2003 10:37:20 AM EDT
Originally Posted By 5subslr5: Branspop, no one can you give you an accurate number of rounds a barrel can fire. FAR too many variables and members above have mentioned most of them.
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I know there are a boatload of variables. I am just kind of looking at a ball-park kind of thing. I would be a liar if I told you I shoot as much as I would like to, so it will likely not be an issue. Still, its nice to have an idea.
Link Posted: 11/22/2003 11:11:21 AM EDT
Originally Posted By DarkStar: [url]www.galleryofguns.com/shootingtimes/Articles/DisplayArticles.asp?ID=1205[/url]
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and
[i]"But there is just a little more to this story. I came to the shoot with a kit bag full of the parts that might break—springs, pins, extractors, ejectors, etc. I never opened the bag. This fine Colt rifle fired 10,000 rounds without one malfunction of any kind. Not a single part broke; not a single failure of any part of the system was experienced."[/i]
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I can vouch for this. My two 6601 HBARs are going on 11k rounds each [:)]
Link Posted: 11/22/2003 4:27:47 PM EDT
[Last Edit: 11/22/2003 4:29:21 PM EDT by MaverickMkii]
Good info. I'd say my barrel is shot out if it can't do 3~4 MoA.(combat accurate) How many rounds through barrel to meet such burn out? (no mag dumps, but rare rapid fires, about 30 rounds in one minute)
Link Posted: 11/22/2003 4:46:42 PM EDT
Originally Posted By model927: I do it usin black hills match grade ammo and plenty of practice.I have an HBAR on all my ARs and a lot of practice.This is also in excellent weather not too hot and plenty of sun on a standard 100 yd target.I also go through a case and a half of rifle ammo a month and have been burning up that much ammo the last 5 years.My shooting didnt get that way over night.Its also easier to group like that when all I used to shoot is my M1A in the usual CMP standing posistion.If I use both eyes open and a combat stance firing quicker the groups open up to 31/2 to 4"I should have been clearer on the shooting style.
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Yeah, it takes a lot of ammo, and a lot of good practice. Thanks for replying back!
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