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Double Rifles, Single Shots & Combinations >> Double Rifles

xausa
.400 member

Reged: 07/03/07
Posts: 2037
Loc: Tennessee, USA

Re: Rimless Cartridges in DR's ??
13/03/07 02:06 AM

I assume that the Krieghoff S/S DR would function as well with .458's as my O/U has, but that still leaves me with reservations.

1. Anecdotal evidence which makes sense to me is that .458 ammunition which has been stored for some time behaves erratically, resulting sometimes in unacceptably low velocity. The .458 case is notoriously small for the performance claimed by the manufacturer, and duplicating factory velocities with handloads has always been difficult. Standard loads have to be heavily compressed, and the effect of compressed charges on ammunition stored for some time has yet, to my knowledge, to be investigated. It is entirely possible that reducing the air space causes ignition to be inhibited, resulting in drastically reduced velocities, certainly not desirable when dealing with dangerous game.

2. The other effect of the inadequate case volume is increased pressure, which can rather easily be dealt with by any modern bolt action, as well as some less than modern (my first .458 was built on a 1903 Springfield action). A double rifle is another matter. Every shot with a cartridge generating up to 55,000 pounds per square inch pressure puts a strain on the action, and with a S/S this strain is partially expressed as torque, which tends to twist the action lugs while at the same time placing a strain on the lugs, the action bolt and the hinge pin. Over time, this will put the action "off face". Using a cartridge designed for use in a DR will postpone this difficulty considerably.

Although I am not convinced that the Krieghoff .500/.416 3 1/4" cartridge is a totally sensible round for a DR, to me it makes much more sense than the .458. My choice would be the .500 NE, which can easily be down loaded to match .458 performance for practice and loaded up to use on game. There is a good variety of cast bullets which shoot really well in the .500, and you can be relatively assured that considerable practice will put far less strain on the action. Moreover, you can be sure that a factory load or round handloaded to factory specs will perform as expected, which is not necessarily the case with the .458.

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Subject	Posted by	Posted on
Rimless Cartridges in DR's ??	AzGuy	10/02/07 10:53 AM
Re: Rimless Cartridges in DR's ??	xausa	09/03/07 02:40 AM
Re: Rimless Cartridges in DR's ??	xausa	08/03/07 10:32 AM
Re: Rimless Cartridges in DR's ??	Marrakai	09/03/07 02:14 AM
Re: Rimless Cartridges in DR's ??	DUGABOY1	21/02/07 09:40 AM
Re: Rimless Cartridges in DR's ??	DUGABOY1	21/02/07 10:19 AM
Re: Rimless Cartridges in DR's ??	NitroX	21/02/07 12:45 PM
Re: Rimless Cartridges in DR's ??	DUGABOY1	22/02/07 05:12 AM
Re: Rimless Cartridges in DR's ??	NitroX	09/03/07 04:22 AM
Re: Rimless Cartridges in DR's ??	mickey	09/03/07 07:05 PM
Re: Rimless Cartridges in DR's ??	JPK	10/03/07 02:11 AM
Re: Rimless Cartridges in DR's ??	smicha6551	12/03/07 06:08 PM
Re: Rimless Cartridges in DR's ??	xausa	13/03/07 02:06 AM
Re: Rimless Cartridges in DR's ??	JPK	13/03/07 09:18 AM
Re: Rimless Cartridges in DR's ??	xausa	15/03/07 01:29 AM
Re: Rimless Cartridges in DR's ??	sbs470	22/02/07 10:11 PM
Re: Rimless Cartridges in DR's ??	DUGABOY1	14/03/07 04:40 AM
Re: Rimless Cartridges in DR's ??	bonanza	23/02/07 12:22 AM
Re: Rimless Cartridges in DR's ??	JPK	23/02/07 03:20 AM
Re: Rimless Cartridges in DR's ??	4seventy	23/02/07 09:00 PM
Re: Rimless Cartridges in DR's ??	escard	28/02/07 06:28 PM
Re: Rimless Cartridges in DR's ??	4seventy	28/02/07 07:33 PM
Re: Rimless Cartridges in DR's ??	CptCurl	28/02/07 10:49 PM
Re: Rimless Cartridges in DR's ??	AzGuy	21/02/07 10:36 AM
Re: Rimless Cartridges in DR's ??	4seventy	21/02/07 12:24 PM
Re: Rimless Cartridges in DR's ??	CptCurl	21/02/07 12:36 PM
Re: Rimless Cartridges in DR's ??	Anonymous	18/02/07 05:17 PM
Re: Rimless Cartridges in DR's ??	vigillinus	19/02/07 02:00 AM
Re: Rimless Cartridges in DR's ??	JPK	19/02/07 02:51 AM
Re: Rimless Cartridges in DR's ??	zimhunter	10/02/07 12:50 PM
Re: Rimless Cartridges in DR's ??	hoppdoc	10/02/07 01:38 PM

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