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Double Rifles, Single Shots & Combinations >> Double Rifles

Marrakai
.416 member

Reged: 09/01/03
Posts: 3550
Loc: Darwin, Top End of Australia

Re: Twist? An easy question.
17/12/05 11:34 AM

Click here for a TWIST RATE CALCULATOR

Hatcher's Notebook is a good place to look for a discussion on theoretical twist rate.

Bulldog: Longer bullets need to be spun faster to stabilize. Longer bullets are generally heavier, but it aint necessarily so! Military Mk7 .303 bullets were made with an aluminium nose-cone to increase BC, as were the Holland Magnum Paradox projectiles. Hollow-points are another case in point (!), and the 12-bore WR Explora projectile had a fully-enclosed hollow copper nose.

Also, remember that a bullet might be quite stable from the muzzle to say 100 yds, but as its velocity falls away its rpm will be reduced and it could become unstable and begin to tip or tumble before reaching say 150 yds.

--------------------
Marrakai
When the bull drops, the bullshit stops!
--------------------------------
www.marrakai-adventure.com.au

Post Extras

Entire topic
Subject	Posted by	Posted on
Twist? An easy question.	bulldog563	17/12/05 09:21 AM
Re: Twist? An easy question.	500Nitro	17/12/05 09:37 AM
Re: Twist? An easy question.	bulldog563	17/12/05 09:41 AM
Re: Twist? An easy question.	mhb	17/12/05 10:20 AM
Re: Twist? An easy question.	500Nitro	17/12/05 11:19 AM
Re: Twist? An easy question.	Marrakai	17/12/05 11:34 AM
Re: Twist? An easy question.	mhb	18/12/05 03:41 AM
Re: Twist? An easy question.	Marrakai	18/12/05 10:58 AM
Re: Twist? An easy question.	mhb	19/12/05 04:04 AM
Re: Twist? An easy question.	Marrakai	19/12/05 10:20 AM
Re: Twist? An easy question.	mhb	19/12/05 11:42 AM
Re: Twist? An easy question.	Marrakai	19/12/05 04:26 PM
Re: Twist? An easy question.	mhb	20/12/05 01:52 AM
Re: Twist? An easy question.	Marrakai	20/12/05 02:01 PM
Re: Twist? An easy question.	mhb	21/12/05 02:18 AM
Re: Twist? An easy question.	CorditeBlues	21/12/05 01:15 AM
Re: Twist? An easy question -- Maybe	CorditeBlues	21/12/05 01:21 AM
Re: Twist? An easy question -- Maybe	mhb	21/12/05 02:25 AM
Re: Twist? An easy question -- Maybe	Marrakai	21/12/05 01:39 PM
Re: Twist? An easy question -- Maybe	mhb	22/12/05 02:50 PM
Re: Twist? An easy question -- Maybe	Marrakai	22/12/05 11:41 PM
Re: Twist? An easy question -- Maybe	mhb	23/12/05 01:41 AM
Re: Twist? An easy question -- Maybe	Marrakai	23/12/05 11:41 AM
Re: Twist? An easy question -- Maybe	500grains	23/12/05 02:19 PM
Re: Twist? An easy question -- Maybe	Marrakai	24/12/05 11:43 AM
Re: Twist? An easy question -- Maybe	mhb	25/12/05 01:07 AM
Re: Twist? An easy question -- Maybe	mhb	24/12/05 01:49 AM
Re: Twist? An easy question -- Maybe	bulldog563	23/12/05 02:43 PM
Re: Twist? An easy question -- Maybe	500grains	22/12/05 05:13 PM
Re: Twist? An easy question -- Maybe	DUGABOY1	22/12/05 05:09 AM
Re: Twist? An easy question -- Maybe	homemadeDR	22/12/05 06:21 AM
Re: Twist? An easy question.	500Nitro	17/12/05 10:09 AM

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