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Barrel Life With "Barrel Burner" Calibers

 
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  #8  
Old 04-29-2014, 02:04 PM
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Re: Barrel Life With "Barrel Burner" Calibers

The benchrest guys have cooked this spread sheet up:

http://accurateshooter.net/Blog/barrellifeupdate.xls
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  #9  
Old 04-29-2014, 11:22 PM
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Join Date: May 2011
Location: in the hills of vic AUS
Posts: 175
Re: Barrel Life With "Barrel Burner" Calibers

Quote:
Originally Posted by Kennibear View Post
Just a guess on my part, but if you are starting at about 1/2 MOA then with proper care I would say 2500 or there abouts. < 70 gr of powder in a 7mm bore is not too bad, but a 308 it ain't!
KB
well thats a 1000 more than i was expecting so i'm happy ..

i'd be happy with 1500 to 1800 ..


Quote:
Originally Posted by Chickenthief View Post
The benchrest guys have cooked this spread sheet up:

http://accurateshooter.net/Blog/barrellifeupdate.xls
thanks ..


cheers D
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  #10  
Old 04-30-2014, 06:52 AM
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Join Date: May 2012
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Re: Barrel Life With "Barrel Burner" Calibers

Quote:
Originally Posted by Chickenthief View Post
The benchrest guys have cooked this spread sheet up:

http://accurateshooter.net/Blog/barrellifeupdate.xls

if you've played with that one a bit you will se it's going to give you rather low #'s compared to what most of us who treat our barrels well are getting.
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  #11  
Old 04-30-2014, 08:39 AM
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Join Date: Jul 2004
Location: Texas
Posts: 5,624
Re: Barrel Life With "Barrel Burner" Calibers

Quote:
Originally Posted by deadidarren View Post
if i'm high jacking tell me and i'll start another thread..

i have a sendero 7mm rem mag load is 69g H1000 180 buger VLD

and i never shoot hot as a matter of fact it never gets above warm

as i wait 5 to 10 min between shots so how many rounds do you blokes

guesstamate i will get whith proper barrel maintenance before the groups

go over 1 moa ..... ?

i know it's a how long is a piece of string question just a guess is all...


cheers D
As stated , Barrel life can vary quite a bit based on the type and amount of powder used, the type of bullet and velocity used and the quality of the barrel and its care.

I used up a barrel in less than 1000 rounds but still have a rifle that shoots 1/2 MOA all day with over 22,000 rounds. I treat all of my barrels with great care and find that some just quit early and others just seem to keep on keeping on.

With your load and good care you should get 3,000+ accurate shouts from the barrel but you may see a lot more before the barrel is used up.

People put to much emphasis on barrel life and should just take care of there barrel and enjoy
what they like to shoot, and when the time comes replace it.

J E CUSTOM
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  #12  
Old 04-30-2014, 09:07 AM
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Join Date: Apr 2014
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Re: Barrel Life With "Barrel Burner" Calibers

OK, I've gotten some excellent input to my original question about burning out a barrel. I have a couple more questions. Does this erosion happen more in one area or the other, or does it occur pretty much throughout the bore at the same rate? Is there some objective way to measure how much erosion has taken place? I hear people say "That barrel is shot out." "How do you know" "Well I cleaned it, but my groups have still opened up an inch from what they used to be." That could be a lot of things, including (as I found out) an ineffective bore solvent.
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  #13  
Old 04-30-2014, 09:30 AM
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Join Date: May 2011
Location: in the hills of vic AUS
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Re: Barrel Life With "Barrel Burner" Calibers

Quote:
Originally Posted by cynicrit View Post
OK, I've gotten some excellent input to my original question about burning out a barrel. I have a couple more questions. Does this erosion happen more in one area or the other, or does it occur pretty much throughout the bore at the same rate? Is there some objective way to measure how much erosion has taken place? I hear people say "That barrel is shot out." "How do you know" "Well I cleaned it, but my groups have still opened up an inch from what they used to be." That could be a lot of things, including (as I found out) an ineffective bore solvent.
you will find the throat will go first with about 3" to 4" thats how my last 2 243 barrels went .
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  #14  
Old 04-30-2014, 10:50 AM
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Re: Barrel Life With "Barrel Burner" Calibers

Quote:
Originally Posted by cynicrit View Post
OK, I've gotten some excellent input to my original question about burning out a barrel. I have a couple more questions. Does this erosion happen more in one area or the other, or does it occur pretty much throughout the bore at the same rate? Is there some objective way to measure how much erosion has taken place? I hear people say "That barrel is shot out." "How do you know" "Well I cleaned it, but my groups have still opened up an inch from what they used to be." That could be a lot of things, including (as I found out) an ineffective bore solvent.
Most of the time the loss in accuracy is very slow and not that much.

It sounds like you may have another issue Like bedding, a bad batch of powder (Not the same as the last you used or worked up with,

The best way I know to measure the throat erosion (Normally the first thing to go) Is to measure the Cartridge overall length while the chamber is new and keep the measurement,then if accuracy fall off check it again and you can see the difference.

If you know someone that has a bore scope you can look at the throat and lead to also see how much erosion you have (Don't be shocked if you look at it with a bore scope because it looks much worse than with a simple bore light).

I recommend a through cleaning, Bed and float the action and barrel then shoot 3 shot groups cleaning between each group and changing powder and primers on each group. This may rule out
any barrel problem.

The rest of the barrel last a lot longer than the throat. but look at the crown to see if it needs freshening up.

Hope this helps

J E CUSTOM
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