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Tom_H
.333 member

Reged: 13/04/05
Posts: 334
Loc: Southeast, NY

Re: Question re a .450/400 3" NE set of barrels on a Valmet DR
08/11/20 10:43 AM

This site was pretty good (and hoping reliable) for pressure specs.
http://kwk.us/pressures.html

I ended up using the rim diameters and case diameters as I didn't have the internal measurements but this will hopefully be apples and apples with F=pxA

Here are the back thrust numbers for a number of cartridges found in the Valmet with rim diameters.

9.3x74R 10290 for 49k

30-06 10620 for 59k

12ga 6000 for 12k

450-400 12000 for 40k

If we use case diameters instead:

9.3x74R 8497

30-06 10620

12ga 9540 (looked at 19k proof)

450-400 9292

I don't think that I messed up any of the math and the case diameter numbers seem more reliable (and in line) with cartridges chambered in doubles.

Good luck.

Tom

Tom

--------------------
Carbonation without fermentation is tyranny

Post Extras

Entire topic
Subject	Posted by	Posted on
Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	25/10/20 09:11 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	25/10/20 09:40 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	25/10/20 11:38 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	27/10/20 11:31 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	27/10/20 11:35 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	xausa	28/10/20 02:55 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	3DogMike	28/10/20 03:17 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	28/10/20 04:35 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	DarylS	05/11/20 11:05 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	05/11/20 12:46 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	DarylS	06/11/20 04:50 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	Hunter4752001	06/11/20 01:24 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	Tom_H	08/11/20 10:43 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	13/01/21 01:37 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	06/06/21 03:57 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	Russ_Gould	26/06/21 03:26 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	16/01/22 12:37 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	24/05/22 10:34 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	luv2safari	27/01/23 07:04 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	10/01/21 05:56 PM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	crshelton	11/01/21 01:36 AM
Re: Question re a .450/400 3" NE set of barrels on a Valmet DR	NitroX	13/01/21 01:36 AM

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