Bren 30-06 barrel with fluted chamber

[cal50]

Does anyone have any info on how Breda produced the fluted chambers on the 30-06 Bren conversion ? Someone that has one of the recent imported parts sets let me chamber cast the barrel and it has heavy fluting.

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[browningautorifle]

how Breda produced the fluted chamber

Aren't those a hammer forged barrel?

[RASelkirk]

Bet the spent brass looks ... interesting!

Russ

[browningautorifle]

Bet the spent brass looks ... interesting!

You've never seen anything coming out of an HK 33 or 91 or 93? Or a G3? They all have fluted chambers too, the MP5 should have too. They all allow positive extraction but are very hard on brass. They weren't meant to supply reloaders with brass.

[RASelkirk]

You've never seen anything coming out of an HK 33 or 91 or 93? Or a G3? They all have fluted chambers too, the MP5 should have too. They all allow positive extraction but are very hard on brass. They weren't meant to supply reloaders with brass.

No, I didn't even know this type of chamber existed. What would be the purpose? Obviously, the mfg'ing expense would be much higher so I must assume some type of benefit...

Russ

[browningautorifle]

I didn't even know this type of chamber existed. What would be the purpose?

These have been around as long as we have...Not new. They aid in extraction.

[Daan Kemp]

These have been around as long as we have...Not new. They aid in extraction.

Usually in firearms with violent extraction cycle, to prevent cases sticking in the chamber or rim torn off.

[cal50]

Hoping to learn any history or manufacturing details on the gun.

I am sure Breda engineers did it for a reason......

[Flying10uk]

But does anyone know how the fluted chamber was/is produced, i.e. with the internal flutes to the chamber? A "traditional method" of producing internal slots within a hole is to use a process known as "broaching" and in this application it is possible that all the flutes were "broached" at the same time or one flute at a time.

[browningautorifle]

But does anyone know how the fluted chamber was/is produced, i.e. with the internal flutes to the chamber?

If you read the procedure for forming a hammer forged barrel, a rotating mandrel is withdrawn and rotated as the barrel is formed. The final part forms the chamber. Or words to that effect, once you read it you'll see the picture in your head... This will help... The More You Know: Cold Hammer Forging (CHF) -The Firearm Blog