External Ballistics

/External Ballistics

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. [...]

Effects of Cartridge Over All Length (COAL) and Cartridge Base To Ogive (CBTO) – Part 2

Cartridge Base To Ogive (CBTO) The first half of this article focused on the importance of COAL in terms of SAAMI standards, magazine lengths, etc.  There is another measure of length for loaded ammunition which is highly important to precision. Figure 2. Chamber throat geometry showing the bullet jump to the rifling or lands. Refer back to Figure 2.  Suppose the bullet was seated out of the case to the point where the base of the bullet's nose (ogive) just contacted the beginning of the riflings (the lands) when the bolt was closed.  This bullet seating configuration is referred to as touching the [...]

Effects of Cartridge Over All Length (COAL) and Cartridge Base To Ogive (CBTO) – Part 1

Many shooters are not aware of the dramatic effects that bullet seating depth can have on the pressure and velocity generated by a rifle cartridge.  COAL is also a variable that can be used to fine tune accuracy.  It's also an important consideration for rifles that need to feed rounds thru a magazine.  In this article, we'll explore the various effects of COAL, and what choices a shooter can make to maximize the effectiveness of their hand loads. Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) Most loading manuals (including the Berger Manual), present loading data according to SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) standards.  [...]

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.

“Accuracy and Precision for Long Range Shooting” by Bryan Litz

Bryan Litz, Berger Bullets' Chief Ballistician, is proud to announce his latest offering to the long range shooting community. In his second book, Bryan helps shooters understand some of the theories behind practical shooting and discusses techniques to improve hit percentages. He says, "Accuracy and Precision for Long Range Shooting is written in the same layman's terms as Applied Ballistics for Long Range Shooting. The book focuses on defining the elements of accuracy and precision in a systematic way, and exploring their independent affects on hit percentage. The material is intended to help shooters make more informed decisions about their equipment and training. Ultimately, the [...]

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 [...]

Form Factors: A Useful Analysis Tool

Background In 2009, Berger Bullets introduced G7 BC's for boat tail bullets. For those who are unfamiliar with G7 BCs, it's simply a Ballistic Coefficient referenced to the G7 standard projectile instead of the G1 standard projectile. The G7 standard is a better match for modern long range bullets, so the G7 BC will be more constant over a wide range of velocities compared to a G1 BC. Please refer to article: https://bergerbullets.com/a-better-ballistic-coefficient/ for the complete explanation of the benefits of using G7 BC's. Since 2009, many shooters have realized the benefits of G7 BC's thru more accurate trajectory predictions. The objective of this article [...]

Bullets to be Discontinued

One of our greatest challenges is growing our capacity to handle the fact that we are blessed with constantly increasing demand. One of the ways that we are dealing with this situation is to discontinue bullets that are not popular. This frees up precious capacity and reduces the number of set ups we must process. The following bullets will be discontinued due to low sales: 22 cal 50 gr Target (Alternative = 22 cal 52 gr) 22 cal 62 gr Varmint (Alternative = 22 cal 60 gr or 22 cal 64 gr) 6mm 62 gr Target (Alternative = 6mm 62 gr Euwin) 6mm 66 gr [...]

Update Regarding the .338 Hybrids

As expected, the release of the new 300 grain .338 Hybrid bullets has made quite a splash. The purpose of this bulletin is to share some facts that have been learned about this bullet since its release. There are two major facts that I’ll elaborate on. 1) The BC of the bullet is being revised, and 2) The bullet has limitations regarding its structural integrity. Revised BC Assessment For unknown reasons, the original BC test produced results that were not repeatable for this bullet. Upon releasing these bullets to the public, we started to hear that trajectories predicted with the advertised BC's were not matching [...]