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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: Jeffery .600 NE
31/01/09 01:14 PM

Regarding withdrawing the underbolting, I think the snap action underlever would provide greater mechanical advantage than the top lever system.
Add to this that the hand is used with the snap action lever as opposed to the thumb with the top lever.
If the gun was "locked up", ie difficult to withdraw the bolting due to heat or whatever causing higher than normal pressures, I think the snap action under lever operated by the hand, would provide better leverage and therefore be easier to move than the top lever pushed by the thumb.
Remember that the 600NE produces very high thrust against the breech compared to other cartridges meant for use in double rifles.
This is why Jeffery has gone to what they felt is a better action design for the 600 NE to be used in high temperature countries.

Some snap action designs (as well as operating the bolting) use the underlever to cock/recock the locks.
I've never had the chance to examine a Jeffery 600NE snap action so I don't know whether the cocking is done by the lever or by the barrels.
Curl will probably know the answer to that I hope.

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Entire topic
Subject	Posted by	Posted on
Jeffery .600 NE	xausa	31/01/09 10:30 AM
Re: Jeffery .600 NE	grandveneur	03/02/09 12:35 AM
Re: Jeffery .600 NE	4seventy	31/01/09 03:18 PM
Re: Jeffery .600 NE	kamilaroi	31/01/09 06:09 PM
Re: Jeffery .600 NE	Der_Jaeger	31/01/09 10:15 PM
Re: Jeffery .600 NE	Der_Jaeger	31/01/09 10:54 AM
Re: Jeffery .600 NE	nopride2	02/02/09 10:56 AM
Re: Jeffery .600 NE	peter	02/02/09 09:41 PM
Re: Jeffery .600 NE	500Nitro	31/01/09 11:00 AM
Re: Jeffery .600 NE	Der_Jaeger	31/01/09 11:10 AM
Re: Jeffery .600 NE	4seventy	31/01/09 01:14 PM
Re: Jeffery .600 NE	CptCurl	31/01/09 11:48 PM
Re: Jeffery .600 NE	Huvius	03/02/09 02:41 AM
Re: Jeffery .600 NE	Paul	04/02/09 12:15 AM
Re: Jeffery .600 NE	CptCurl	03/02/09 08:52 AM
Re: Jeffery .600 NE	500Nitro	03/02/09 05:06 AM
Re: Jeffery .600 NE	4seventy	01/02/09 08:09 AM
Re: Jeffery .600 NE	Der_Jaeger	01/02/09 12:07 AM
Re: Jeffery .600 NE	CptCurl	01/02/09 01:09 AM
Re: Jeffery .600 NE	Anonymous	01/02/09 05:38 AM
Re: Jeffery .600 NE	CptCurl	01/02/09 12:52 AM
Re: Jeffery .600 NE	4seventy	01/02/09 08:16 AM
Re: Jeffery .600 NE	Marrakai	01/02/09 12:28 PM
Re: Jeffery .600 NE	Marrakai	01/02/09 12:41 PM
Re: Jeffery .600 NE	1980E26	02/02/09 12:40 AM
Re: Jeffery .600 NE	Der_Jaeger	31/01/09 02:47 PM
Re: Jeffery .600 NE	mickey	31/01/09 11:56 AM
Re: Jeffery .600 NE	500Nitro	31/01/09 11:55 AM

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