by: Corey Schwanz
A “barrel twist rate” is referring to the rate of spin in the rifle barrel, indicated as inches per turn. For example, a 1:10″ twist rate means that the rifling will spin the bullet one revolution in ten inches. The lower the number, the faster the twist rate of the barrel. For example, a 1:9″ twist is a FASTER twist rate than a 1:10″ twist since the bullet makes a full rotation in less barrel length.
Different bullets will require different twist rates in order to stabilize and get the most accurate and precise downrange results. If you have too slow of a twist rate your BC can be compromised, and in extreme situations, the bullet may even tumble mid-flight. This can be seen as a “keyhole” on the target, which means that you’ll see an oval shape instead of a circle.
- What is the Berger Twist Rate Stability Calculator?
- How do you use a twist rate stability Calculator?
- Why would you use a twist rate calculator?
- How does the Berger twist rate calculator work?
- What is the Miller twist rate formula?
- Why is the Miller twist rule better than the Greenhill rifling formula?
- What does SG mean?
- What SG number is best?
- What SG do I want for my rifle/barrel?
- Why doesn’t the Miller twist rate formula work with flat based bullets?
- What SG do I need to stabilize a bullet?
- Why do I want an SG of 1.5 or higher?
- What does rifle twist rate mean?
- Why does barrel twist rate matter?
- What is my optimal barrel twist rate?
- What is the best barrel twist rate?
- Why is G7 BC better than G1 BC?
- What is the difference between G1 BC and G7 BC?