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A typical rifle barrel is worn out in 5-10 seconds of use

This is a discussion on A typical rifle barrel is worn out in 5-10 seconds of use within the Accuracy forums, part of the M14 M1A Forum category; I'm sending my worn out barrel back with a complaint that it doesn't last long....


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Old March 2nd, 2017, 07:50 AM   #16
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I'm sending my worn out barrel back with a complaint that it doesn't last long.

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Old March 2nd, 2017, 09:19 AM   #17
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Had a guy tell me, "I bought a used Crown Victoria for $8,500. That's only $2.05 per pound!"
So I hear your local grocer bought a car ...

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Old March 2nd, 2017, 11:16 AM   #18
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Originally Posted by Rich D View Post
Given the flame temperature of almost 6000 degrees F in the barrel, it's not surprising.
6000F is 3600K

Your average single based IMR propellant has an adiabatic isochoric flame temperature of around 4700F, even double based small arms propellant rarely gets over 5000F.

M8 tank gun propellant has a flame temperature of around 6000F, but the stuff is 43% nitroglycerine. (Double-based WC846 Ball propellant is only 10% nitroglycerine, and heavily deterred, yielding a much lower flame temperature.)

But, you are on the right track - The melting point of steel is around 2500F.

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Old March 2nd, 2017, 02:26 PM   #19
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Originally Posted by Stamp Mill View Post
A

Weird way to look at it. But it is interesting. Maybe you guys that reload can calculate how may pounds of powder goes off in that 10 seconds to do the shoving.
FGGM .308 168gr SMK has 43 -43.4 grains.
5000rds=217,000 grains or 31#s

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Old March 2nd, 2017, 02:38 PM   #20
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Originally Posted by ChileRelleno View Post
FGGM .308 168gr SMK has 43 -43.4 grains.
5000rds=217,000 grains or 31#s
So... if the 5000 rounds was actually one long (really long) 30 caliber bullet that weighed 120# and was on the top of a brass case that held 31# of powder, it would wear the barrel out in one shot that took 10 seconds to exit the 22" barrel. (if somehow it magically did not blow up or get too hot).

And it would look pretty weird too.

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Old March 2nd, 2017, 07:07 PM   #21
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Top fuel drag engines only last about 750 revolutions. One pass then the rebuild.
Closer to 900 revolutions when you count warm up on alcohol.

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Old March 2nd, 2017, 11:53 PM   #22
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Top fuel drag engines only last about 750 revolutions. One pass then the rebuild.
And it uses over 11 gallons of fuel in that one pass!

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