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wkudu
.275 member


Reged: 24/12/17
Posts: 55
Loc: United States
.333 Jeffery Flanged
      #329192 - 07/06/19 03:44 AM

No I don't have any cool pictures..yet

Worse, I have a question. Is the 333 Flanged the 450/400 3" necked down and shortened? Or is there another parent case?

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Huvius
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Reged: 04/11/07
Posts: 3522
Loc: Colorado
Re: .333 Jeffery Flanged [Re: wkudu]
      #329195 - 07/06/19 04:18 AM

I don’t think so.
If I’m not mistaken, there isn’t another case to make it out of.

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wkudu
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Reged: 24/12/17
Posts: 55
Loc: United States
Re: .333 Jeffery Flanged [Re: Huvius]
      #329197 - 07/06/19 04:46 AM

Well then, there is another cartridge to be 'invented'

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3DogMike
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Reged: 29/01/15
Posts: 1413
Loc: Western Slope, Colorado USA
Re: .333 Jeffery Flanged [Re: wkudu]
      #329203 - 07/06/19 08:38 AM

Quote:

No I don't have any cool pictures..yet
Worse, I have a question. Is the 333 Flanged the 450/400 3" necked down and shortened? Or is there another parent case?



Interesting question. The actual published base diameter of both is .544" while the .450/.400 3" rim is slightly smaller diameter at .614" versus .625" for the .333 Flanged. (inconsequential difference)

The only big difference is the rim thickness where the .333 Jeffery Flanged is published at .080" thick while the .450/.400 3" is .065".

The rim thickness would not be a great obstacle if the .333 conversion were headspaced on the shoulder or a .015"thick washer/spacer were fabricated. "Headspace" on the shoulder in any event will mitigate early case head separations.

Seems a doable conversion if one wanted to wait for a likely very expensive and long delivery time set of case forming dies.

Bertram makes .333 Jeffery Flanged brass. Probably less expense and trouble in the long run.
Not sure if anyone in the USA currently imports modern Kynoch ammo, but they do list the .333 Jeffery Flanged.

- Mike

EDIT: Just measured some several year old Hornady .450/.400 3" Jeffery factory ammo.
Base is ~.5425
Rim Diameter .620"
Rim Thickness .060"

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TH44
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Reged: 21/02/09
Posts: 731
Loc: West UK
Re: .333 Jeffery Flanged [Re: 3DogMike]
      #329216 - 08/06/19 09:00 AM

I agree with Huvius that it is most unlikely

The 450/400 3" was made with a thick rim and slight shoulder difference so it (as a powerful Nitro cartridge) would not chamber in older 450/400 3 1/4" rifles made for Black Powder only

The .333 Jeffery was a .404 Jeffery shortened and necked down

According to Hoyem the .333 flanged was "a rimmed version of the previous (.333 Jeffery) cartridge, made by several ammunition makers

The extra rim thickness IMHO preclude it from being based on (another maker's?) case and probably not the 450/400

TH

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