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barrel life of a standard ar-15

This is a discussion on barrel life of a standard ar-15 within the M16 AR15 forums, part of the Rifle Forum category; I have a standard ar-15 that shoots 5.56mm with a barrel length of 16in. I've put maybe 800rds of 5.56 and with my .22lr conversion ...


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Old July 7th, 2009, 07:30 AM   #1
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barrel life of a standard ar-15

I have a standard ar-15 that shoots 5.56mm with a barrel length of 16in. I've put maybe 800rds of 5.56 and with my .22lr conversion bolt maybe 1800 rds. I was wondering what the average service life before I need to get the barrel replaced?

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Old July 7th, 2009, 09:10 AM   #2
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If you are shooting 55 grain ammo and are following good cleaning practices (use a bore guide, coated rod, and a good copper cleaner and end up with a bore with either a little Rem Oil or Hoppe's #9 to keep it from being dry while stored), you should get at least 6000 to 7000 rounds through there without significant loss of accuracy -- maybe closer to 10,000. 75, 77, and 80 grain bullets will wear the throat quicker. Service rifle competitors, who are using those heavier bullets, will generally change out somewhere between 3000 and 5000 unless they are using moly coated and then barrel life is dramatically extended. The throat is what will wear first.

Good luck and good shooting.

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Old July 7th, 2009, 09:16 AM   #3
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The barrel life with 22lr should be just about foreever. With the .223 it can vary due to a number of conditions.

What I can say is that our department just rebarreled some old Colt M4's. They were bought new by us, and they are about 10 years old. They had at least 2000+ rounds a year through them. They are the SWAT guns, so it was a mix of semi and burst. Probably more burst than needed.

They were still holding about 2 in at 100 yards, but the chrome in the throat was starting to peel. They were rebarrel to 11.5 inch. It was cheaper than buying new guns for the cans they bought.

In essence barrel life goes until you experience an accuracy loss that is significant to you.

jasonj

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Old July 8th, 2009, 07:06 AM   #4
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alright thanks,
I was just wondering when I should look at replacing the barrel because me and my friend shoot almost every weekend so now I know when's a good time. Thanks again

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