View Single Post
Old May 9, 2013, 03:41 AM   #3
darkgael
Senior Member
 
Join Date: February 9, 2006
Location: Homes in Brooklyn, NY and in Pennsylvania.
Posts: 4,355
Twist

With all due respect, the relationship between a bullet and the proper twist rate has little to do with bullet weight.
The Greenhill Formula for calculating twist rates does not require any weight input, though there is input for specific gravity. The necessaries are bullet length, bullet diameter, and velocity.
See this link:
http://kwk.us/twist.html

Pete
__________________
“Auto racing, bull fighting, and mountain climbing are the only real sports ... all others are games.” Ernest Hemingway ...
NRA Life Member
darkgael is offline  
 
Page generated in 0.04247 seconds with 7 queries