Twist Rate

Update of Berger Bullets’ Performance Data

Berger Bullets has always been a leader in evolving the information provided to shooters, helping them make the most educated decisions regarding their bullet choice.  Once again, we are pioneering new advances in ballistic performance data. Twist Rate Advancements First, we made new advancements in the area of bullet stability and twist rates.  Modern long range bullets have benefits that cannot be fully realized with a single digit twist rate number, such as 1:12”.  There is a big gray area of marginal stability in which bullets can fly with good accuracy, but a depressed BC.  Recognizing this reality, Berger is now listing a new optimal twist rate. [...]

The State of the Art in Rifle Bullet Stability

Overview The modern rifle is named for the spiral grooves cut in the barrel which impart a spin to the bullet. Spinning imparts gyroscopic stability, which is what keeps the bullet flying point forward. Longer bullets need to spin faster than shorter bullets to achieve stability. For many years, the relative proportions of bullets haven’t changed much, and so the twist rate of riflings has sort of stagnated around standard values. However in recent times, technology is advancing to the point where higher performance (longer) bullets can be made with greater precision, and so the thoughtful consideration of twist rate and stability is becoming important. [...]

Our New Twist Rate Calculator; A How To Guide

The information in this guide is no longer relevant. Our newest version of our twist rate stability calculator has a how to guide built into it. You can find the new version of our twist rate calculator here. Click the orange "for more information" text to find the new guide.

2012 National Matches – President’s & NTI results

It’s that time again! Rifle and pistol shooters from all over the US flock to Ohio every summer for the National Matches at Camp Perry (an Ohio National Guard base). These matches have been held since 1903 and run for almost six weeks each year. The highpower phase starts this week with the CMP Matches. This week is a blend of highpower “Across the Course” Service Rifle competition and education opportunities for new shooters. The Small Arms Firing school is open to competitors of all levels, and focuses on gun safety and training tips from expert shooters. The competition started on Monday with [...]

Long Range Hunting in Brady, Texas

Let’s get one thing out of the way right up front. There are several different ways one can go hunting. You can go out into the open spaces all over this great country of ours and seek out animals in a free range hunt. You can spot and stock or set up in a blind and wait. Another option is to go to one of the numerous ranches who raise game for the purpose of being hunted (or shot if you regard the word hunting as meaning more than shooting game). Some would call this game shooting rather than game hunting, and I don’t disagree [...]

Twist requirement for the new .204 caliber 55 grain Long Range BT Bullet

The data in this article is out of date. For up to date information on twist rates, please visit our twist rate calculator at As shooters of low drag spin stabilized projectiles, we’re compelled to understand the twist requirements of our bullets. In most cases, this is a simple matter of looking up what the manufacturers recommended twist rate is and making sure our barrel satisfies it. Occasionally you can get away with using a slower twist than what’s recommended if you’re shooting in favorable conditions. The manufacturers recommended twist rate is intended to ensure stability for any and all possible shooting situations, which [...]