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

DarylS
.700 member

Reged: 10/08/05
Posts: 27911
Loc: Beautiful British Columbia, Ca...

Re: 10 bore to 12 bore
26/05/12 01:40 AM

If the 12 is heavily built - it will work just fine, especially with smokeless loads.

The heavy 2 3/4" load IIRC, was 7 drams - 191gr. of black powder. This produced some 1,500fps to 1,550fps with a 12 bore ball of some 583gr. weight (1.33ounce) in pure lead or hardened at about 554gr. weight - 1.25ounce approx.

You can do this with smokeless powder with about 50% the recoil - the BP load is not fun to shoot, for me at least. You might like it, but it was hard on my stock - split down the wrist and needed repair. After that, I used only smokeless.

The 10 bore AYA I used lead in for geese - many years ago, was built much more strongly than any 12 bore double I've had. Shortened, it would weigh about 9 pounds and would also shoot a heavier ball, but with gas check cups to hold the ball centered, it could shoot a 600gr. .735" ball easily in it's .774" bore at much higher speeds & more easily than a 12 bore would do with a 12 or 13 bore ball.
With the undersized and smaller ball you should be able to achieve 2,000fps or close to that with that 600gr. ball - that's bear smackin' power!

Ed Huble might be able to suggest where to start with loads. They might already be in his thread - for suggested places to start, that is.

The gun's extra weight would also help, but know that 3 1/2" cases would probably be used and they would take a lot of wads to fill, which increases the ejecta and therefore recoil for any load. 2 7/8" might be better, however are they available new in plastic or perhaps paper?

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

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

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Subject	Posted by	Posted on
10 bore to 12 bore	TomN	26/05/12 01:23 AM
Re: 10 bore to 12 bore	doubleriflejack	30/05/12 04:38 AM
Re: 10 bore to 12 bore	casper50	30/05/12 04:56 AM
Re: 10 bore to 12 bore	TomN	27/08/12 08:48 AM
Re: 10 bore to 12 bore	casper50	29/08/12 01:10 AM
Re: 10 bore to 12 bore	TomN	01/09/12 02:08 AM
Re: 10 bore to 12 bore	TomN	11/09/12 02:08 PM
Re: 10 bore to 12 bore	DarylS	12/09/12 12:03 AM
Re: 10 bore to 12 bore	TomN	12/09/12 01:12 PM
Re: 10 bore to 12 bore	DarylS	12/09/12 11:51 PM
Re: 10 bore to 12 bore	TomN	13/10/12 09:55 AM
Re: 10 bore to 12 bore	DarylS	14/10/12 05:18 AM
Re: 10 bore to 12 bore	TomN	14/10/12 12:13 PM
Re: 10 bore to 12 bore	DarylS	15/10/12 03:01 AM
Re: 10 bore to 12 bore	TomN	28/10/12 12:30 PM
Re: 10 bore to 12 bore	DarylS	29/10/12 03:31 AM
Re: 10 bore to 12 bore	TomN	29/10/12 01:28 PM
Re: 10 bore to 12 bore	DarylS	01/11/12 02:35 AM
Re: 10 bore to 12 bore	TomN	09/11/12 03:41 PM
Re: 10 bore to 12 bore	TomN	09/12/12 06:18 AM
Re: 10 bore to 12 bore	DarylS	10/12/12 03:58 AM
Re: 10 bore to 12 bore	TomN	10/12/12 07:07 AM
Re: 10 bore to 12 bore	DarylS	10/12/12 07:51 AM
Re: 10 bore to 12 bore	TomN	11/12/12 09:30 AM
Re: 10 bore to 12 bore	AkMike	11/12/12 01:05 PM
Re: 10 bore to 12 bore	TomN	11/12/12 01:56 PM
Re: 10 bore to 12 bore	DarylS	12/12/12 03:25 AM
Re: 10 bore to 12 bore	TomN	13/12/12 12:44 PM
Re: 10 bore to 12 bore	DarylS	26/05/12 01:40 AM
Re: 10 bore to 12 bore	TomN	26/05/12 02:32 AM
Re: 10 bore to 12 bore	DarylS	26/05/12 08:02 AM
Re: 10 bore to 12 bore	casper50	26/05/12 09:49 AM
Re: 10 bore to 12 bore	TomN	26/05/12 10:41 AM

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