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Barrel Burn Chart

 
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  #1  
Old 05-09-2014, 06:20 AM
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Barrel Burn Chart

Just sharing it!

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Old 05-09-2014, 10:10 AM
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Re: Barrel Burn Chart

I don't know where you picked it up(some gun rag), but it represents no truths whatsoever.
Actually, it's completely opposite of EVERY reality!
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Old 05-09-2014, 05:52 PM
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Re: Barrel Burn Chart

Quote:
Originally Posted by Mikecr View Post
I don't know where you picked it up(some gun rag), but it represents no truths whatsoever.
Actually, it's completely opposite of EVERY reality!
Sorry, I wish I have more information than that. I was researching a chart and ran into it. I supposed I should have caveat it.

ADDED: http://www.ar15.com/archive/topic.html?b=6&f=5&t=400350
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Old 05-09-2014, 06:40 PM
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Re: Barrel Burn Chart

Quote:
Originally Posted by Mikecr View Post
I don't know where you picked it up(some gun rag), but it represents no truths whatsoever.
Actually, it's completely opposite of EVERY reality!
It's not much further off imo than the barrel life app. that's running around... They are all so ballpark that they aren't much better than "your barrel will wear out sometime if you shoot it".
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Old 05-09-2014, 07:33 PM
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Re: Barrel Burn Chart

Quote:
Originally Posted by Lefty7mmstw View Post
It's not much further off imo than the barrel life app. that's running around... They are all so ballpark that they aren't much better than "your barrel will wear out sometime if you shoot it".
I agree! I've seen them in text form but this is the first on chart form ... at least for me.
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  #6  
Old 05-09-2014, 08:21 PM
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Re: Barrel Burn Chart

Better 'app' for barrel life: http://accurateshooter.net/Blog/barrellife2013oct.xls
The factors to account for in barrel life:
-Your precision with which to detect departure in barrel performance
-Shot rate
-Powder amount
-Powder heat potential
-Load pressure
-Carbon build-up
-Mitigating factors(like melonite treatment)

The linked spreadsheet here has a common and competitive 6PPC load entered.
This is a tiny underbore cartridge using a very cool powder in well cared for barrels, but it's shot quickly in grouping, at extreme pressures, and with precision that lends to immediate detection of issues. So it doesn't see 5-6000 rounds of barrel life like anyone would expect, it sees ~900 before setback or replacement.

If your expectation from a 6PPC was 1/2moa, well then you can't detect accuracy loss -that you never had to begin, and you might think your accurate barrel life is way higher than reality.
So in this aspect it's subjective.

Barrel life is too complicated for a single chart because the causal combinations possible run into many thousands. Just play with QuickLoad a bit to see this.
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  #7  
Old 05-09-2014, 09:55 PM
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Re: Barrel Burn Chart

Mikecr,

Thanks for the update ... I had the 2010 version,
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