Originally Posted by Blackbrush
This is a good article from someone I wouldn't question very much on internal and external ballistics. There are no downsides to faster twist rates in this modern era.

http://bulletin.accurateshooter.com/2015/02/does-barrel-twist-rate-affect-muzzle-velocity-litz-test/


from the article:
Quote
After all the smoke cleared, we found that muzzle velocity correlates to twist rate at the rate of approximately 1.33 fps per inch of twist.

In other words, your velocity is reduced by about 5 fps if you go from a 1:12” twist to a 1:8” twist.


Now, I wish he would redo his test with multiple bullet weights.

edit to add:

Looks like he did.

http://store.appliedballisticsllc.com/ProductDetails.asp?ProductCode=0004

Last edited by RWE; 02/12/15.