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

Dphariss
.300 member

Reged: 18/04/06
Posts: 130
Loc: Montana

Re: Slow twist barrels
06/01/12 06:55 AM

12 bore rifles:
Getting useable plains game/Forsythe velocity with a ball this big is going to make a lot of recoil in a hunting weight rifle. Forsythe's rifle used a "#15 ball".
12 to the pound ball weighs 580 gr and is .730 in diameter so. A .720 ball will weigh 560 grains this is 30%+- heavier than a .662 ball (16 to the pound). It will require more powder, probably 30% more to make the same velocity a 16 bore will.
I have a 80" twist flintlock rifle that uses a .662 ball and a heavy patch. It makes about 1600 with 140 gr of FF Swiss.
It weighs about 10 pounds and makes all the recoil I care to have. It shoots flat enough to about 120 yards.
Its also nice to have a bore size that will take a ball that is readily available. I have a tanner in .673 but its a bigger pain to use than a Lyman mould.
Dan

Post Extras

Entire topic
Subject	Posted by	Posted on
Slow twist barrels	Smoke73	24/12/11 06:59 PM
Re: Slow twist barrels	Birdhunter50	25/12/11 12:14 AM
Re: Slow twist barrels	DarylS	25/12/11 06:46 AM
Re: Slow twist barrels	Smoke73	25/12/11 08:42 AM
Re: Slow twist barrels	DarylS	25/12/11 08:48 AM
Re: Slow twist barrels	Tom_H	26/12/11 12:37 PM
Re: Slow twist barrels	tinker	26/12/11 01:04 PM
Re: Slow twist barrels	CowboyCS	26/12/11 02:01 PM
Re: Slow twist barrels	bouldersmith	26/12/11 11:22 PM
Re: Slow twist barrels	DarylS	27/12/11 05:38 AM
Re: Slow twist barrels	CowboyCS	27/12/11 12:17 PM
Re: Slow twist barrels	Dphariss	06/01/12 06:30 AM
Re: Slow twist barrels	CowboyCS	06/01/12 01:10 PM
Re: Slow twist barrels	Dphariss	07/01/12 02:27 AM
Re: Slow twist barrels	Smoke73	07/01/12 02:49 AM
Re: Slow twist barrels	jaz	10/01/12 01:01 PM
Re: Slow twist barrels	DarylS	11/01/12 05:53 AM
Re: Slow twist barrels	Dphariss	06/01/12 06:55 AM
Re: Slow twist barrels	DarylS	06/01/12 11:18 AM
Re: Slow twist barrels	DarylS	28/12/11 05:32 AM
Re: Slow twist barrels	DarylS	06/01/12 05:06 AM
Re: Slow twist barrels	bouldersmith	27/12/11 10:04 AM
Re: Slow twist barrels	CptCurl	24/12/11 10:19 PM

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