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Military Firearm Restoration Corner

Cleaning Up 308 Chamber To 30-06


littlecanoe

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I have a project in mind and was wondering if a 30-06 reamer would totally clean up a 308 chamber without having to set the barrel back. I've been looking at the specs and it looks like it might but I'm out of my comfort zone here.

 

Thanks,

lc

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No, it will not clean the chamber up. The 308 has less body taper than the 30-06. So, the shoulder is wider on the 308, than the body of the 30-06 at the same place.

 

What would happen if someone did this?

Would you end up with an extra shoulder or would the the case fail?

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Doesn't the taper change most somewhat forward of the webbing? If a bit of setback of the barrel was required how much would be needed?

 

A lot. Measure, or look at a drawing of, the shoulder of the .308. Then see where on the .30-06 case it measures the same. That will give you the answer.

 

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Spiris,

 

I don't have the barrel but was looking at the 308's that fmsniper had used in a build. He found them on Numrich. I was wanting to build a heavy barrel 30-06 and thought that the barrel might be a good starting point. The price is right! The action is the Steyr that I had posted on last week. Large ring.

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The only option for that is to rechamber to '06 Ackley improved. It'll thoroughly clean up a 308 and give the old '06 a boost.

con: FL die cost

 

 

308 schematic

http://ammoguide.com/?catid=92

 

'06 AI schematic

http://ammoguide.com/?catid=255

 

NCsmitty

 

 

only way I made mine work is that it was a heavy target barrel Shilen, i set the shoulder back about 1/2 inch and finnish reamed it to 3006, it works great, but the barrel was very heavy it had allot of meat on it

 

when I first did it it was not far enough and I had 3006 casing expanding at the neck so I pulled it off and went deeper, you are better off just getting a good 3006 barrel..

here is the gun i am talking about

346457092.jpg

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fm,

I had been thinking of the 308 cal Norwegian barrels that you had bought from Numrich. I believe you had posted a pic of that rifle showing spec4 what you'd done.

 

Did you have any trouble with feeding of the 308?

 

non they feed great, I make a pocket in theextractor and tapper itso the extractor snaps over the cartridge. works like a dream

 

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