tiwst to wieght ratio

[maddawg]

Hello Gang
I am looking for a twist to bullet wieght ratio chart for 308? Any ideas?
best regards maddawg

 

[MALLARD]

Re: tiwst to wieght ratio

i dont know for sure , but twist is related to bullet OAL and not weight , it just so happens that heavier bullets typically have longer OAL

sorry no chart , you can run your bullet OAL and twist in a stability calculator
http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi

the higher the number the better , jbm uses little colors to show whats "ideal"

 

[shoot4fun]

Re: tiwst to wieght ratio

Mallard is on the money here.
Use JBM to calculate twist rate for a particular bullet.

 

[Graham]

Re: tiwst to wieght ratio

It's not bullet weight, it's bearing surface length.

http://www.riflebarrels.com/articles/bullets_ballastics/bullet_imbalance_twist.htm

 

[maddawg]

Re: tiwst to wieght ratio

Thanks Guys
I have a rifled barrel that I bought and checking 308 bullets now ... this was greatly appreciated
maddawg

 

[vman]

Re: tiwst to wieght ratio

Check out Bryan Litz 2nd Edition Applied Ballistics book.

Has good info on all the big name projectiles for .308 along with stability info and twist rates.

 

[maddawg]

Re: tiwst to wieght ratio

ok well i have a 1 to 10 twist dang so what bullet weight should i start at... the write up left me thinking well heavier? opinions?
thanks maddawg

 

[Tripwire]

Re: tiwst to wieght ratio

A 1:10 covers a LOT of ground.........

 

[maddawg]

Re: tiwst to wieght ratio

kewl could you let me know your thoughts ?
Maddawg