Twist rate

Wachsmann

Well-Known Member
Joined
Feb 1, 2008
Messages
893
Location
Idaho
In the future I want to get my Sendero rebuilt. I'll be going with the 7mm ultra mag for my choice. I would like to primelry set the gun up to shoot the 180 VLD's for long range. What is the preferred twist rate or best twist rate and length of barrel to get the best performance out of this combo....any experienced or susgestions are welcome. The gun I currently have is a 300 ultra mag.
 

7stw

Well-Known Member
Joined
Jan 21, 2010
Messages
2,089
Location
Salisbury Maryland
In the future I want to get my Sendero rebuilt. I'll be going with the 7mm ultra mag for my choice. I would like to primelry set the gun up to shoot the 180 VLD's for long range. What is the preferred twist rate or best twist rate and length of barrel to get the best performance out of this combo....any experienced or susgestions are welcome. The gun I currently have is a 300 ultra mag.

A 1 in 9 is said to be adequate for 180 bullets.
 

wyld

Member
Joined
Jan 17, 2013
Messages
15
A 1:8 should work. You can calculate the exact twist rate by using formulas from various sources. The best source I have found is from the book, "Sporting Firearms, A Designers Notebook" obtainable from Amazon.com It has a companion CD with several programs, one of which has the most popular twist formulas which allow you to enter the data and the program produces the result for you.
RF
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 
Top