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-   -   How long does a rifle barrel last? (http://www.firearmstalk.com/forums/f18/how-long-does-rifle-barrel-last-48839/)

Yunus 09-26-2011 11:37 AM

How long does a rifle barrel last?
 
Excusing any details like large caliber and extreme rates of fire it is common to answer this question by saying a few thousand bullets. That answer is fairly accurate. However there is another way to think about it that really puts it into perspective. Would it shock you to learn that average barrel life is under six seconds?

Gone in Six Seconds — The Shocking Truth of Barrel Life « Daily Bulletin

Quote:

Here’s a little known fact that may startle most readers, even experienced gunsmiths: your barrel wears out in a matter of seconds. The useful life of a typical match barrel, in terms of actual bullet-in-barrel time, is only a few seconds. How can that be, you ask? Well you need to look at the actual time that bullets spend traveling through the bore during the barrel’s useful life. (Hint: it’s not very long).

Trez 09-26-2011 04:11 PM

Maybe if you a bench rest shooter... I dont seem to have any problems with my ol' mil-surps and im sure they have shot more than 3,000 rounds...

mrm14 09-26-2011 04:20 PM

That 6 second rule for barrel life does vary a few fractions of a second depending on the caliber and velocity of the bullet. 243 Win. is a total barrel burner and 300 Win. Mag. is a throat burner as an example. The barrel of that 300 Win. Mag. I had built last year for 1000 yard target rifle lasted only 1132 rounds which is normal life span for how I used it.

I'd be curious of how many seconds that 1132 rounds equates to.

Jpyle 09-26-2011 07:11 PM

Assuming an average muzzle velocity in excess of 2000 fps along a 24" barrel the bullet is in the barrel 1 one thousandeth (.001) of a second. Your total bullet-in-barrel time is about 1.1 seconds; (1,100 x .001)

Yunus 09-26-2011 07:59 PM

Another way to think of this. Cost per hour of work. At $300 a barrel and assuming were getting a full 6 seconds of useful work out of the barrel we need to replace 10 per minute and 60 minutes in an hour.

$300
X
10
X
60
=
$180,000 per hour! How much do you get paid per hour? :D

About 2000 hours is the normal amount of time a person works in a year. To hire a barrel for a year would cost $360,000,000.

Jpyle 09-26-2011 11:12 PM

Plus benes if its a union barrel. :)

BenLuby 09-26-2011 11:41 PM

Quote:

Originally Posted by Jpyle (Post 587477)
Plus benes if its a union barrel. :)

But then it won't work half the time and you don't know if it's fake or not.

mrm14 09-27-2011 12:31 AM

Quote:

Originally Posted by Jpyle (Post 587355)
Assuming an average muzzle velocity in excess of 2000 fps along a 24" barrel the bullet is in the barrel 1 one thousandeth (.001) of a second. Your total barrel time is about 1.1 seconds; (1,100 x .001)

3080 fps MV. and 28" long barrel. Probably still about the same in time.

JonM 09-27-2011 02:57 AM

Well a union barrel would cost 30,000$ each work for .04 seconds each 1000 rounds and protest governer scott walker of wisconsin the rest of the time

Jpyle 09-27-2011 03:14 AM

Quote:

Originally Posted by mrm14 (Post 587529)
3080 fps MV. and 28" long barrel. Probably still about the same in time.

ok...here goes...

3080 feet = 36,960 inches

36,960 inches = 1,320 28" barrels

bullet is in barrel .00075 seconds

1,132 rounds x .00075 seconds per round = .85 seconds bullet-in-barrel time.


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