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Double Rifles, Single Shots & Combinations >> Double Rifles

DarylS
.700 member

Reged: 10/08/05
Posts: 26521
Loc: Beautiful British Columbia, Ca...

Re: Cogswell & Harrison.500 express, London.
05/10/20 11:57 AM

Back in the 70's I had a Remington sold Italian Zouave .58 for which I bored the noses of the minnies out on. My 505gr. mould cast oversize, right at .580", so I modified the plunger and made them almost solid with a very short thick skirt. They came out at 600gr.+ - I do not remember exactly. I would bore out the noses, roughly 3/8" and 3/8" deep, then fill the cavity with a compound of 5 parts Potassium Clorate, I part sublimed (flour of)sulphur, 1 part ground up briquettes. Mixed in a slurry, then dried.
Anyway, sealed over with beeswax and very carefully loaded, 3 shots would cut off a 12" aspen(poplar).

After I found out (from a chemist) if mixed in a slurry, that formula became very sensitive to detonating for seemingly no reason, I quit using it. Apparently if not mixed in a slurry it is more stable. I quit it's use and did not test that.
Apparently the formula was made illegal in Great Britain in 1898 due to it's instability, however, for years that formula was used in pill locks and tube locks as simple percussion, resulting in compression would set it off.

Good stuff, maybe not.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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Subject	Posted by	Posted on
Cogswell & Harrison.500 express, London.	rigbymauser	10/05/20 12:51 AM
Re: Cogswell & Harrison.500 express, London.	DarylS	10/05/20 01:13 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	10/05/20 01:27 AM
Re: Cogswell & Harrison.500 express, London.	TH44	10/05/20 07:28 AM
Re: Cogswell & Harrison.500 express, London.	tinker	11/05/20 12:12 AM
Re: Cogswell & Harrison.500 express, London.	poprivit	11/05/20 12:33 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	20/09/20 11:14 PM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	20/09/20 11:51 PM
Re: Cogswell & Harrison.500 express, London.	DarylS	21/09/20 02:54 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	21/09/20 06:42 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	05/10/20 02:32 AM
Re: Cogswell & Harrison.500 express, London.	tinker	05/10/20 02:56 AM
Re: Cogswell & Harrison.500 express, London.	DarylS	05/10/20 03:25 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	05/10/20 04:11 AM
Re: Cogswell & Harrison.500 express, London.	DarylS	05/10/20 04:18 AM
Re: Cogswell & Harrison.500 express, London.	85lc	05/10/20 08:28 AM
Re: Cogswell & Harrison.500 express, London.	DarylS	05/10/20 11:57 AM
Re: Cogswell & Harrison.500 express, London.	Marrakai	05/10/20 01:04 PM
Re: Cogswell & Harrison.500 express, London.	DarylS	06/10/20 03:08 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	27/10/20 02:54 AM
Re: Cogswell & Harrison.500 express, London.	DarylS	27/10/20 03:22 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	28/11/20 12:55 AM
Re: Cogswell & Harrison.500 express, London.	DarylS	28/11/20 04:27 AM
Re: Cogswell & Harrison.500 express, London.	tinker	28/11/20 05:33 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	28/11/20 06:25 AM
Re: Cogswell & Harrison.500 express, London.	vandeusenps	29/11/20 08:42 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	17/02/21 05:59 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	17/02/21 08:47 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	17/02/21 08:57 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	17/02/21 09:36 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	17/02/21 09:44 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	17/02/21 09:45 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	17/02/21 09:47 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	28/02/21 02:41 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	28/02/21 03:01 AM
Re: Cogswell & Harrison.500 express, London.	Parabola	28/02/21 03:50 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	28/02/21 04:39 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	07/03/21 03:11 PM
Re: Cogswell & Harrison.500 express, London.	tinker	07/03/21 03:58 PM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	07/03/21 08:08 PM
Re: Cogswell & Harrison.500 express, London.	3DogMike	08/03/21 01:38 AM
Re: Cogswell & Harrison.500 express, London.	NitroX	11/03/21 01:51 AM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	08/03/21 02:48 AM
Re: Cogswell & Harrison.500 express, London.	NitroX	11/03/21 01:56 AM
Re: Cogswell & Harrison.500 express, London.	93x64mm	11/03/21 10:46 PM
Re: Cogswell & Harrison.500 express, London.	NitroX	12/03/21 03:14 PM
Re: Cogswell & Harrison.500 express, London.	rigbymauser	06/10/20 01:05 AM
Re: Cogswell & Harrison.500 express, London.	3DogMike	10/05/20 02:29 AM

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