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Double Rifles, Single Shots & Combinations >> Double Rifles

ALF
.275 member

Reged: 21/11/03
Posts: 51
Loc: Out of Africa

Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH
15/04/06 01:56 PM

I just love this one:

Momentum is the better predictor of penetration ? and SD is not?

Sorry but I strongly disagree !

Momentum by itself says nothing about penetration in a medium, short and simple as it does not address the retardation forces that the medium exerts on the projectile !

A 150 gr monometal, non deforming, non fragmenting 30 cal projectile shot at higher velocity does not outpenetrate a 220 gr monometal, non deforming, non fragmenting 30 cal projectile shot at equal momentum values, not at the maximum allowable velocities for our current ballistics systems !

Retardation as a factor is dependent on projectile mass and projectile frontal area, in short related to what we commonly refer to as SD.

The variuos penetration models that exist such as Poncellet all employ momentum but in addition to the mathematical calculation of Retardation ! It is a ballistics principle as old a man itself !

Post Extras

Entire topic
Subject	Posted by	Posted on
SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WHERE?	hoppdoc	05/04/06 08:51 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	500grains	06/04/06 12:05 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	hoppdoc	06/04/06 02:38 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	500grains	06/04/06 07:10 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	gitano	06/04/06 02:55 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	AzGuy	06/04/06 04:25 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	hoppdoc	06/04/06 04:50 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	gitano	06/04/06 09:47 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	AzGuy	06/04/06 01:45 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	gitano	06/04/06 01:59 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	CptCurl	06/04/06 07:52 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	clark7781	07/04/06 01:35 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	jscybercat	14/04/06 01:48 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	hoppdoc	14/04/06 09:07 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	NE450No2	15/04/06 02:45 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	ALF	15/04/06 01:56 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	500grains	15/04/06 03:09 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	500grains	14/04/06 01:57 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	jscybercat	16/04/06 02:21 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	hoppdoc	06/04/06 05:29 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	bulldog563	06/04/06 05:07 PM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	hoppdoc	06/04/06 11:34 AM
Re: SOLID PENETRATION TESTING ARTICLES-HOW MUCH/WH	k80	06/04/06 10:24 AM

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