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Double Rifles, Single Shots & Combinations >> Paradox and Bore Guns

DarylS
.700 member

Reged: 10/08/05
Posts: 26977
Loc: Beautiful British Columbia, Ca...

Re: Regulating a 12 bore
08/02/12 06:18 AM

Tks. for the heads up on the powder buring, Smoke. If the crimps are not heavy enough, or initial pressure seating the wads isn't high enough, it's difficult to get the slower burning powders to ignite.

That's why Ed's is using Fed 439 or maybe it's 239 (whichever is the right number) primers - the hottest shotshell primers available, anyway. Powder compression with the wads is important as well and difficult to get with plastics. I think rather than total plastics, a plastic cup on the powder, then 1/2" fibre and card wads are the answer to get the powder buring correctly. The plastic wads come out of the case too easily, I think. Reduce loads to start, of course, when changing anything. Normal seating pressure with card and fiber wads was 50 pounds.

I've some blue Dot I could try SR7625, which shot very accurately in my 12 bore double as well as SR4756 - right to 1,500fps chronographed using 'cupped' .684" balls (466gr. in WW, and 482gr. Pure). I think I got to 1,400fps with 7625. In the 12, they are b oth very slow burning powders for normal 1 1/4oz loads. Since I was shooting the lighter round balls, I got quite good downrange results with those powders.

Lyman has some data for blue dot and the rest in their shotshell book with .690RB's and maybe 500gr. Breneke's or some-such slugs and their 525gr. sabot slug that fits the red wads perfectly. Differeing years have different data, but most of it runs only to 1,500fps max. Of course, with 500gr. bullets or balls, that's quite enough and matches 1890's elephant loads for the early ball guns shooting 7 drams.

Everyone should try that load at least once, if your stock is up to it strength-wise. It's a bit hairy in a 7 1/2 pound 12 bore, though.

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

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

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Subject	Posted by	Posted on
Regulating a 12 bore	Smoke73	28/07/11 05:41 AM
Re: Regulating a 12 bore	DennisA	05/08/11 09:07 AM
Re: Regulating a 12 bore	DarylS	06/08/11 02:47 AM
Re: Regulating a 12 bore	DennisA	06/08/11 03:17 AM
Re: Regulating a 12 bore	DarylS	06/08/11 08:17 AM
Re: Regulating a 12 bore	DennisA	06/08/11 04:50 PM
Re: Regulating a 12 bore	Smoke73	06/08/11 05:12 PM
Re: Regulating a 12 bore	DennisA	07/08/11 03:23 AM
Re: Regulating a 12 bore	DennisA	07/08/11 03:26 AM
Re: Regulating a 12 bore	DarylS	07/08/11 04:03 AM
Re: Regulating a 12 bore	Smoke73	07/08/11 04:52 PM
Re: Regulating a 12 bore	Smoke73	11/09/11 11:43 AM
Re: Regulating a 12 bore	DarylS	12/09/11 01:59 AM
Re: Regulating a 12 bore	Smoke73	14/09/11 12:31 PM
Re: Regulating a 12 bore	Smoke73	14/09/11 12:37 PM
Re: Regulating a 12 bore	DarylS	15/09/11 01:02 AM
Re: Regulating a 12 bore	Smoke73	16/09/11 01:20 PM
Re: Regulating a 12 bore	jaz	16/09/11 09:09 PM
Re: Regulating a 12 bore	DarylS	17/09/11 12:46 AM
Re: Regulating a 12 bore	Smoke73	29/09/11 03:13 PM
Re: Regulating a 12 bore	DarylS	30/09/11 01:25 AM
Re: Regulating a 12 bore	Smoke73	17/11/11 07:26 PM
Re: Regulating a 12 bore	DarylS	18/11/11 04:37 AM
Re: Regulating a 12 bore	Smoke73	18/11/11 07:12 AM
Re: Regulating a 12 bore	DarylS	18/11/11 07:38 AM
Re: Regulating a 12 bore	Smoke73	05/01/12 04:17 PM
Re: Regulating a 12 bore	Smoke73	05/01/12 05:07 PM
Re: Regulating a 12 bore	Smoke73	14/01/12 11:59 AM
Re: Regulating a 12 bore	DarylS	15/01/12 05:51 AM
Re: Regulating a 12 bore	Smoke73	15/01/12 04:46 PM
Re: Regulating a 12 bore	DarylS	16/01/12 06:01 AM
Re: Regulating a 12 bore	Smoke73	16/01/12 06:18 AM
Re: Regulating a 12 bore	Smoke73	16/01/12 06:34 AM
Re: Regulating a 12 bore	Smoke73	23/01/12 05:44 PM
Re: Regulating a 12 bore	DarylS	24/01/12 04:14 AM
Re: Regulating a 12 bore	DarylS	24/01/12 04:21 AM
Re: Regulating a 12 bore	Smoke73	07/02/12 08:19 AM
Re: Regulating a 12 bore	DarylS	08/02/12 06:18 AM
Re: Regulating a 12 bore	Smoke73	08/02/12 09:46 AM
Re: Regulating a 12 bore	tinker	08/02/12 12:57 PM
Re: Regulating a 12 bore	DarylS	09/02/12 03:33 AM
Re: Regulating a 12 bore	tinker	09/02/12 04:07 AM
Re: Regulating a 12 bore	Smoke73	22/03/12 03:52 PM
Re: Regulating a 12 bore	tinker	22/03/12 04:50 PM
Re: Regulating a 12 bore	Smoke73	23/03/12 01:42 AM
Re: Regulating a 12 bore	Smoke73	23/03/12 03:55 PM
Re: Regulating a 12 bore	tinker	23/03/12 04:15 PM
Re: Regulating a 12 bore	Smoke73	23/03/12 11:38 PM
Re: Regulating a 12 bore	Smoke73	25/03/12 05:21 AM
Re: Regulating a 12 bore	Smoke73	25/03/12 01:28 PM
Re: Regulating a 12 bore	Smoke73	25/03/12 01:30 PM
Re: Regulating a 12 bore	beleg2	28/07/11 09:51 PM
Re: Regulating a 12 bore	Smoke73	28/07/11 11:11 PM
Re: Regulating a 12 bore	CommandCar	29/07/11 01:02 AM
Re: Regulating a 12 bore	DarylS	29/07/11 01:46 AM
Re: Regulating a 12 bore	DarylS	29/07/11 02:02 AM
Re: Regulating a 12 bore	Smoke73	29/07/11 05:34 AM
Re: Regulating a 12 bore	CommandCar	29/07/11 12:31 PM
Re: Regulating a 12 bore	Smoke73	29/07/11 04:24 PM
Re: Regulating a 12 bore	DarylS	30/07/11 01:34 AM
Re: Regulating a 12 bore	Smoke73	30/07/11 11:31 AM
Re: Regulating a 12 bore	Smoke73	29/07/11 01:35 AM
Re: Regulating a 12 bore	500Nitro	29/07/11 01:41 AM

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