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Shooting & Reloading - Mausers, Big Bores and others >> Muzzleloaders & Blackpowder

Tatume
.400 member

Reged: 09/06/07
Posts: 1091
Loc: Gloucester, Va USA

Zihn/Rigby rifle
05/08/08 12:16 AM

Hello Folks,

After pondering the relative effectiveness of the Rigby-style muzzleloading rifle Steve Zihn built for me, I decided to compare the
Taylor Knock Out index (TKO) to some cartridge guns. To give some idea of the magnitude involved, here is a photo of the ball next
to a round of 454 Casull ammunition. The ball is perched atop a 45 Colt case.

TKO was proposed by John “Pondoro” Taylor as an index of killing power on large, dangerous game. It is calculated as the product of
projectile mass (in lbs), speed (fps), and diameter (inches).

TKO = (grains * muzzle velocity * diameter) / 7000
TKO muzzleloader = (430 * 1800 * 0.665) /7000 = 73.5
TKO 458 magnum = (500 * 2250 * 0.458) / 7000 = 73.6

Recoil is comparable too. It looks like the gun is up to any job I put it to.

Take care, Tom

Post Extras

Entire topic
Subject	Posted by	Posted on
Zihn/Rigby rifle	Tatume	05/08/08 12:16 AM
Re: Zihn/Rigby rifle	Dphariss	07/08/08 01:53 AM
Re: Zihn/Rigby rifle	szihn	07/08/08 02:06 AM
Re: Zihn/Rigby rifle	Tatume	06/09/08 10:18 PM
Re: Zihn/Rigby rifle	szihn	07/09/08 02:12 AM
Re: Zihn/Rigby rifle	Tatume	26/10/08 06:04 AM
Re: Zihn/Rigby rifle	DarylS	15/11/08 06:58 AM
Re: Zihn/Rigby rifle	szihn	26/10/08 07:07 AM
Re: Zihn/Rigby rifle	mehulkamdar	26/10/08 11:55 AM
Re: Zihn/Rigby rifle	richla	26/10/08 12:07 PM
Re: Zihn/Rigby rifle	tinker	07/09/08 02:49 AM
Re: Zihn/Rigby rifle	szihn	07/09/08 03:51 AM
Re: Zihn/Rigby rifle	richla	26/10/08 03:13 AM
Re: Zihn/Rigby rifle	tinker	26/10/08 04:46 AM
Re: Zihn/Rigby rifle	AzGuy	05/08/08 05:37 AM
Re: Zihn/Rigby rifle	Tatume	05/08/08 06:08 AM
Re: Zihn/Rigby rifle	szihn	05/08/08 11:08 AM
Re: Zihn/Rigby rifle	Marrakai	05/08/08 12:43 AM
Re: Zihn/Rigby rifle	szihn	05/08/08 02:44 AM
Re: Zihn/Rigby rifle	Tatume	05/08/08 03:04 AM
Re: Zihn/Rigby rifle	szihn	05/08/08 04:51 AM

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