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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

Bramble
.375 member

Reged: 29/07/06
Posts: 950
Loc: England

Re: Extra set of DR barrels
04/09/08 02:13 AM

The whole breech pressure thing is going to open up a can of worms here as there are several opinions on this matter here in relation to converted weapons.

It is not the breech pressure that is important up to a degree dependent on barrel wall thickness, but how that acts on the breech face and attempts to open the gun. So BREECH THRUST

FROM THE DATA I HAVE: Base thrust:

400/350 16 Tons
9.3 x 74 16 Tons

30/40 CIP Max ave pressure 47,000 psi
Base area = 0.1643( {.457/2}{.457/2}x 3.14) Inch square x 47,000 = 7722.1 lbs / 2240 = 3.447 Tons thrust.

Now this is not exact there are some issues around this, however even allowing for error of 100% it is for me, a good chioce on a light action for plains game and US use..

I think that the 30-40 is the sleeper cartridge for sane conversions. Wide choice of bullets, plentiful and cheep cases, easy barrel supply and nice to shoot in a lightish gun.

Regards

Post Extras

Entire topic
Subject	Posted by	Posted on
Extra set of DR barrels	Squarebridge	26/08/08 06:50 AM
Re: Extra set of DR barrels	450_366	26/08/08 07:33 AM
Re: Extra set of DR barrels	Squarebridge	26/08/08 09:38 AM
Re: Extra set of DR barrels	NitroX	07/09/08 08:11 PM
Re: Extra set of DR barrels	Huvius	31/08/08 12:33 AM
Re: Extra set of DR barrels	Bramble	31/08/08 02:45 AM
Re: Extra set of DR barrels	Huvius	06/09/08 02:53 AM
Re: Extra set of DR barrels	450_366	06/09/08 04:25 AM
Re: Extra set of DR barrels	Bramble	06/09/08 08:20 AM
Re: Extra set of DR barrels	Squarebridge	06/09/08 03:10 PM
Re: Extra set of DR barrels	Bramble	08/09/08 07:43 AM
Re: Extra set of DR barrels	450_366	06/09/08 05:33 PM
Re: Extra set of DR barrels	450_366	03/09/08 08:12 PM
Re: Extra set of DR barrels	Bramble	04/09/08 02:13 AM
Re: Extra set of DR barrels	450_366	04/09/08 05:02 AM
Re: Extra set of DR barrels	Paul	04/09/08 07:55 PM
Re: Extra set of DR barrels	450_366	05/09/08 03:41 AM
Re: Extra set of DR barrels	Birdhunter50	09/09/08 08:15 AM
Re: Extra set of DR barrels	Squarebridge	04/09/08 11:16 PM
Re: Extra set of DR barrels	Squarebridge	01/09/08 11:58 AM
Re: Extra set of DR barrels	tecno	30/08/08 12:20 AM
Re: Extra set of DR barrels	500Nitro	30/08/08 06:39 AM
Re: Extra set of DR barrels	tecno	10/09/08 05:40 PM
Re: Extra set of DR barrels	Squarebridge	10/09/08 11:15 PM
Re: Extra set of DR barrels	tecno	13/09/08 11:14 PM
Re: Extra set of DR barrels	tecno	15/02/14 09:33 PM
Re: Extra set of DR barrels	Ckhobart	16/02/14 08:29 AM
Re: Extra set of DR barrels	MotelAlpha	10/03/14 12:58 AM
Re: Extra set of DR barrels	Bramble	30/08/08 11:06 AM
Re: Extra set of DR barrels	500Nitro	30/08/08 02:16 PM
Re: Extra set of DR barrels	Bramble	30/08/08 11:29 PM
Re: Extra set of DR barrels	500Nitro	31/08/08 12:20 AM
Re: Extra set of DR barrels	tecno	30/08/08 01:15 AM
Re: Extra set of DR barrels	Squarebridge	01/09/08 12:11 PM

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