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Barrel fluting

 
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  #1  
Old 09-22-2006, 07:50 PM
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Barrel fluting

thinking of fluting my newly built .300 ultra mag but got scared off by the barrel maker who said i will ruin the barrel if i do this. he said that the only way to properly flute a barrel is to flute it before it goes out for lapping. is this true? any help would be appreciated.


mike
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  #2  
Old 09-22-2006, 09:02 PM
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Re: Barrel fluting

Mike
I spent some time in Mike Rock's shop (Rock Creek Barrels) and he fluted his before they were rifled. If I remember right it has something to do with fluting process changing the bore diameter slightly, I think.
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Old 09-22-2006, 09:18 PM
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Re: Barrel fluting

thats what i was told but have herd several people speak of barrels that they fluted after every thing, chamber, threads, ect. and clam to shoot very well. that is why i am asking.
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Old 09-22-2006, 09:26 PM
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Re: Barrel fluting

I've heard/read of folks that have done it as well and as a very general rule the heavier contours seem to be less affected by the process than the thin sporter contours.

I've got no scientific evidence, just rumor/hearsay/opinion, so take it for what its worth.
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Old 09-23-2006, 04:34 AM
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Re: Barrel fluting

Don't do it! Wait till you shoot out the barrel and are ready for a new barrel. Then order a barrel fluted from one of the top barrel makers. You run the risk of ruining a good shooting barrel if you flute it now!
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Old 09-23-2006, 06:05 AM
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Re: Barrel fluting

Wouldn't you want to flute the barrel only BEFORE the last stress releaving cycle you put the barrel through?
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Old 09-23-2006, 08:36 AM
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Re: Barrel fluting

I have fluted bbls after i recieved them, they all shot very well. I didn't really know that the bore dia could change due to stresses the tooling imparts on the steel. I called several bbl makers and asked them what should i do, i got conflicting reports, one said the bbl is ruined, others said you may need to stress relive it agian and re-lap, and another said just shoot it. The big trick is dont remove much metal on each pass, take your time, this way your not building up massive amounts of stress.

I dont flute bbls anymore, unless its a test gun for my personal use.
My 338 snipe-tac, (personal was used for a test rifle.
I wanted to see just how much weight i could get off the bbl by using very large flutes. I used a 31/64th end mill, they are deep! Before fluting the gun would shoot .5moa... after fluting the gun shot 1moa, i felt sick...did i ruin the bbl? I totally cleaned the bore and used moly powder to burnish the bore, re-broke in the bbl. After 20 shots the fouling was gone and groups were back and even better, .2moa was this just a fluke? Probally

In my opinon, have the bbl fluted when you order it. This will be the best option. If any thing it will give you peace of mind.
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