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Max Effective Range of Small Arms - Kindle
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In this article, I'll attempt to define a method for finding the maximum effective range of a shooting system under the influence of predefined field variables. This is accomplished using a 6-degree-of-freedom (6 dof) computer simulation that is able to model real world factors influencing the rotation and translation of spin stabilized projectiles. I'll then show how the results can be used to make decisions about what type of rifle is right for a particular application, and how far a weapon may be successfully employed against specific targets.
Extending the Max Effective Range of Small Arms - Kindle
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This article is an extension of the previous article (Max Effective Range of Small Arms). The first objective is to show how the hit probability diminishes as the Maximum Effective Range (MER) is exceeded. Furthermore, ideas are presented for how to increase in maximum effective range by understanding and applying corrections for so called ì6 degree of freedom effects.
How External Ballistics Programs Work - Kindle
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There are several possible methods for calculating the flight path and other properties of a ballistic trajectory like: velocity, time of flight and wind drift. Some programs calculate more things than others. Some have the potential to be inherently more accurate than others. In this article, I’ll try to explain the features of each method.
Epicyclic Swerven - Kindle
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This work was done to investigate a question about the grouping ability of rifles at various ranges. Many shooters, including myself, have observed the strange phenomenon of a rifle that groups angularly smaller at long range than short range. In other words, a rifle that groups 1” at 100 yards grouping 1.5” at 200 yards (you would expect no less than 2” at 200 yards).
Understanding Long Range Bullets Part 1 - Kindle
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When you look at the bullets we use for long range shooting, you can’t help but notice the striking similarity between all of them. From .224 thru .30 caliber, they have just about the same proportions. In this article, Iíll try to explain the major consequences that scale has on long range bullets. This is the first installment of a two part article. This part establishes some facts about bullet scaling, and the second article examines how you can use the information to make better-informed decisions about your equipment.
Understanding Long Range Bullets: Part 2 - Kindle
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In part one of this series, we identified some basic trends that occur when you scale bullets up and down in caliber. Most of our findings were Fundamental and academic. This month, I want to take a close look at some of the practical consequences of scale. Whereas last months article focused on establishing facts, this part will give some conclusions, judgments and some of my opinions based on the facts.
Ballistics Coefficient Testing - Kindle
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All serious long range shooters are aware that bullets have a ballistic coefficient, and that it’s somehow related to how much the bullet will drop and drift in the wind. Shooters place various degrees of importance on knowing the exact BC of their bullets, and shooting bullets with high BC’s. In this paper, I want to explore some of the benefits of knowing precisely what the BC of their bullet is, and also, the different methods available to determine the BC of a bullet. The main point of this writing is to show that BC’s can be measured from firing tests more easily, and with less error than is commonly thought.
BC Testing: Berger .30 cal 155 Grain VLD - Kindle
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The purpose of this article is to discuss the ballistics of the Berger .30 caliber 155 grain VLD as measured by firing tests. Such thorough and precise firing tests are a rare commodity for the sporting arms industry. As tempting as it is to dive into the interesting topic of the test itself, only limited discussion is provided on the actual test procedures. The main focus will be on the results of the tests.
BC Testing: Sierra .30 cal 155 Grain - Kindle
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Somewhat of a historical article at this point in time (2013), this article takes an in depth look at what was once the standard bullet for international Palma bullet shooting. This detailed article describes the careful testing and ballistic performance assessment of this classic bullet.
BC Testing: Lapua .30 cal 155 grain Scenar - Kindle
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Take a detailed look at Lapua’s flagship FULLBORE bullet, the 155 grain Scenar. This report details the physical properties of this bullet including mass and aerodynamic properties, as well as ballistic performance as determined by live fire testing.