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264 Win Mag and Barrel Life

 
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  #1  
Old 05-02-2007, 05:58 AM
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264 Win Mag and Barrel Life

I have been recently toying with getting another rifle (shocking, I know)and have read the old descriptions of certain cartridges which are "known barrel burners" with low (1k) barrel life. The 264 win mag seems to have this in its description.

Have better barrels and throating styles in modern rifles removed this "scarlet letter" for this cartidge and others in this category or is there some recommendations on velocity/bullet weights which extend the barrel life?

Thanks for the input

Mule
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Old 05-02-2007, 09:36 AM
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Re: 264 Win Mag and Barrel Life

I had one built a few years back, 27" Lilja, launching 142SMKs @3250- it didnt last 600 rounds. Had to chase the throat every 50-70 rnds. Never, never again. That rifle is now in my favorite cartridge, the 7mmRM!
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Old 05-02-2007, 10:30 AM
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Re: 264 Win Mag and Barrel Life

The .264 is like any other large volume case.

They can be really tough on barrels, or not so tough on barrels.

The problem with the .264WM, the .220 Swift, and others of this ilk, is the people that are attracted to these rounds, want the most velocity they can get (or they would get slower rounds).

When these rounds are pushed to the edge, they can eat barrels in little time.

142 SMKs @ 3250, is WAY over max load and bound to eat up throats... doesn't mean it's "unsafe", just that it's a real mean load on barrels... loading manuals list 3,000 as max with this weight.

If you load reasonable loads, you can get 1,200 to 1,500 rounds out of a barrel... just don't take it to a prairie dog town.

.
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Old 05-02-2007, 10:55 AM
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Re: 264 Win Mag and Barrel Life

"And others of this ilk" [img]/ubbthreads/images/graemlins/smirk.gif[/img] [img]/ubbthreads/images/graemlins/smirk.gif[/img]-good jab !
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Old 05-02-2007, 11:57 AM
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Re: 264 Win Mag and Barrel Life

So what makes this group of cartidges susceptable to such wear? Is is related to the amount of powder burnt to get to 3,000fps and beyond or just a combination of things that lead to an early death of the barrel?

Mule
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Old 05-02-2007, 12:05 PM
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Re: 264 Win Mag and Barrel Life

[ QUOTE ]
"And others of this ilk" [img]/ubbthreads/images/graemlins/smirk.gif[/img] [img]/ubbthreads/images/graemlins/smirk.gif[/img]-good jab !

[/ QUOTE ]

I wasn't jabbing at anyone. [img]/ubbthreads/images/graemlins/confused.gif[/img]

I was talking about the family of cartridges that have high case volume in relationship to the bore size.

These are the .22-250, the .220 swift, 6mm AI, 6x284, 6.5-'06, etc. These carts have two things against them... they are barrel burners, and they are rounds that are often used in conditions that consume lots of rounds, like PD towns, 'chuckin', etc.

.
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Old 05-02-2007, 12:13 PM
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Re: 264 Win Mag and Barrel Life

[ QUOTE ]
So what makes this group of cartidges susceptable to such wear? Is is related to the amount of powder burnt to get to 3,000fps and beyond or just a combination of things that lead to an early death of the barrel?

Mule

[/ QUOTE ]

It's the relationship of the case capacity to the bore size.

If you take a large case like the H&H and put it in a small bore, like a .270 or 6.5... the bore will burn out very fast.

The same case size and same amount of powder in a large bore size like a .375, or .458, and the barrel throat will last forever.

There are some ridiculous wild cats like the .22x284 and .22-'06 whose barrel lives are measured in 100 to 200 rounds.

You pays your money and you takes your choice...

.
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