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Double Rifles, Single Shots & Combinations >> Double Rifles

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

Re: Double of the Day
29/09/12 03:18 PM

Quote:

What the heck is .450 2.5" on the flat of the lefthand barrel?

That would be the mark for .458 Win Mag.
The bore measures .450", (groove .458") and the case length is two and a half inches.
This is the way the Birmingham proof marks were done between 1954 and 1989.
The proofmarks of that era would also include the chamber pressure in TONS per []". (tons per square inch)
For the .458 Win Mag that would be 19.5 TONS per []".

Post Extras

Entire topic
Subject	Posted by	Posted on
Double of the Day	NitroX	02/08/12 04:28 AM
Re: Double of the Day	Wes350	04/08/12 08:48 AM
Re: Double of the Day	450	04/08/12 09:37 PM
Re: Double of the Day	bonanza	02/08/12 11:52 PM
Re: Double of the Day	Buchsemann	03/08/12 12:57 AM
Re: Double of the Day	DarylS	03/08/12 08:38 AM
Re: Double of the Day	NitroX	05/08/12 03:12 AM
Re: Double of the Day	Morten	09/08/12 03:06 AM
Re: Double of the Day	DarylS	09/08/12 03:58 AM
Re: Double of the Day	radin	19/09/12 10:11 AM
Re: Double of the Day	Huvius	19/09/12 10:26 AM
Re: Double of the Day	crkennedy1	21/09/12 01:10 AM
Re: Double of the Day	DarylS	21/09/12 01:51 AM
Re: Double of the Day	93mouse	21/09/12 03:07 AM
Re: Double of the Day	WildCattle	24/09/12 10:10 AM
Re: Double of the Day	DUGABOY1	29/09/12 11:39 AM
Re: Double of the Day	4seventy	29/09/12 03:54 PM
Re: Double of the Day	xausa	07/03/14 07:55 AM
Re: Double of the Day	DUGABOY1	08/10/12 03:25 AM
Re: Double of the Day	Huvius	21/09/12 09:46 AM
Re: Double of the Day	kamilaroi	21/09/12 03:28 PM
Re: Double of the Day	Mike_Bailey	21/09/12 05:33 PM
Re: Double of the Day	Huvius	22/09/12 12:11 AM
Re: Double of the Day	4seventy	29/09/12 03:18 PM
Re: Double of the Day	lancaster	22/09/12 05:36 AM
Re: Double of the Day	zephyr	16/11/12 12:30 AM
Re: Double of the Day	NitroX	07/04/13 02:06 AM
Re: Double of the Day	TH44	07/04/13 02:39 AM
Re: Double of the Day	casper50	07/04/13 02:53 AM
Re: Double of the Day	AkMike	07/04/13 02:59 AM
Re: Double of the Day	DarylS	07/04/13 10:24 AM
Re: Double of the Day	chuckT	03/08/12 10:26 AM
Re: Double of the Day	Buchsemann	03/08/12 12:26 PM
Re: Double of the Day	tinker	03/08/12 01:54 PM
Re: Double of the Day	DarylS	04/08/12 12:46 AM
Re: Double of the Day	Ripp	07/04/13 10:55 AM
Re: Double of the Day	NitroX	07/04/13 04:13 PM
Re: Double of the Day	Matabele	08/04/13 04:18 PM
Re: Double of the Day	Mike_Bailey	08/04/13 09:34 PM
Re: Double of the Day	Buchsemann	09/04/13 02:16 AM
Re: Double of the Day	NitroX	06/03/14 04:05 PM
Re: Double of the Day	Waidmannsheil	06/03/14 05:58 PM
Re: Double of the Day	aromakr	03/08/12 09:25 AM
Re: Double of the Day	CptCurl	02/08/12 10:14 PM

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