Barrel twist, bullet weight and accuracy

[hardpan]

All,
Is there a formula for determing the bullet weight required for stabilization given barrel twist and velocity? I have heard things like a bullet is too light, but never seen any math or physics about this.
thanks,
Hardpan

 

[JD338]

hardpan,

try this-
http://kwk.us/twist.html

JD338

 

[JDMAG]

I was just about to post that! my fingers are still slow from being frozen! :?

 

[hardpan]

appreciate it

 

[hardpan]

Ok, i see the equation
T = 3.5 * V^0.5 * D^2 / L

but should the equals sign be "equal to or less than" or "equal to or greater than"

 

[JDMAG]

I believe it should be equal to. Because you stating what the twist would be for the given bullet length, diameter, muzzle velocity, and SG.

 

[JDMAG]

I found several posts on rifle twist on this forum. I did not however find anything to help explain the greenhill formula. You may have better luck.

http://www.longrangehunting.com/forums/ ... ist-38341/

 

[hardpan]

thanks for the help. The formula gives the minimum twist.
Hardpan