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

4seventy
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Reged: 07/05/03
Posts: 2210
Loc: Queensland Australia

Re: Possible to convert a 9.3x72r to a 9.3x74r ??
11/04/12 11:23 AM

Quote:

19 Long Tons is 42,560PSI 19.4 Long Tons is 43,680PSI

Daryl
"19 Long Tons" is an expression of weight, not pressure. The British (cartridge pressure) system uses (long) Tons per square inch. Tons per square inch was shortened to "Tons" on some of the proof stampings.

You cannot directly convert the British Tons per square inch cartridge pressure system, to psi {which has been measured using a different method}, in the way you have done it here.
Your method of simply multiplying the "Tons" by 2240 will give very inaccurate and dangerous results.

As I mentioned above, The British system rates the .375 H&H Belted Rimless Magnum at 19.5 Tons per square inch, and that is a 62,000 psi cartridge.

Quote:

By the looks of this, if there is enough steel for the re-chamber, one can hold pressure down by not shooting factory ammo and only shooting mid range handloads - more powerful than the 9.3x72, yet not as high pressure as 9.3x74 ammo 'could' be loaded to.

Regardless of what soft loads are intended to be used by the owner, the gun would still be required to withstand re-proofing.
This will be tested at FAR higher pressure than what a factory 9.3X74R is rated at.

Note....
I've edided my original wording in this post more than once in an attempt to clarify some points.

Edited by 4seventy (11/04/12 07:25 PM)

Post Extras

Entire topic
Subject	Posted by	Posted on
Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	10/04/12 07:50 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 02:03 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	tinker	11/04/12 04:43 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	11/04/12 06:00 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	Tatume	11/04/12 06:13 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	11/04/12 07:01 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	4seventy	11/04/12 09:18 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 07:19 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	4seventy	11/04/12 09:09 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 09:40 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ?? DELETED	DarylS	11/04/12 10:34 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	4seventy	11/04/12 11:23 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	500Nitro	11/04/12 11:56 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 12:29 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	11/04/12 07:57 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	11/04/12 08:23 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	tinker	11/04/12 08:34 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	CptCurl	11/04/12 09:04 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	4seventy	12/04/12 07:21 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	12/04/12 09:01 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	NitroX	14/04/12 05:27 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	ruffcountry	12/04/12 02:52 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	12/04/12 03:54 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	500Nitro	12/04/12 04:25 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	Mike_Bailey	12/04/12 05:10 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	Sville	15/04/12 04:08 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	Mike_Bailey	15/04/12 06:51 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	kuduae	15/04/12 08:02 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	Sville	16/04/12 04:12 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	12/04/12 07:33 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	12/04/12 10:32 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	500Nitro	11/04/12 10:31 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	12/04/12 04:00 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	500Nitro	12/04/12 05:21 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	tinker	12/04/12 05:30 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	12/04/12 03:03 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	tinker	12/04/12 03:31 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	snky35	11/04/12 08:58 PM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	tinker	11/04/12 07:31 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 07:34 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 07:43 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 07:29 AM
Re: Possible to convert a 9.3x72r to a 9.3x74r ??	AkMike	11/04/12 06:10 AM

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