You have probably watched one of the excellent shooting sports videos Ryan Cleckner has done for the NSSF. Ryan’s Understanding Minute of Angle (MOA) video (see below) has been viewed over 3.6 million times! Ryan is noted for his ability to explain complex topics in an easy-to-comprehend manner.
Cleckner has also authored a hugely popular book, the Long Range Shooting Handbook, which expands on the topics covered in his popular video series. This book is the #1 Best Seller on Amazon in its category. You can view Sample Chapters from Ryan’s book — just click “Read Sample” on the Amazon product page.
As a long-range shooting expert, Ryan Cleckner has impressive credentials. Cleckner was a special operations sniper (1/75 Rgr) with multiple combat deployments, and he has served a U.S. Army sniper instructor. Currently he works as a firearms industry executive and attorney.
The Long Range Shooting Handbook is divided into three main categories: What It Is/How It Works, Fundamentals, and How to Use It. “What It Is/How It Works” covers equipment, terminology, and basic principles. “Fundamentals” covers the theory of long range shooting. “How to Use It” gives practical advice on implementing what you’ve learned, so you can progress as a skilled, long range shooter.
Ryan Cleckner’s best-selling Long Range Shooting Handbook is designed as an introduction to important fundamental concepts such as MOA vs. MILs, External Ballistics, and Environmental Effects. Included are personal tips and advice based on Cleckner’s years of experience as a sniper instructor and special operations sniper.
Iain Harrison, editor of Recoil Magazine, said: “Whether you’re looking to dip a toe into the complex world of long range shooting, or you’re a seasoned shooter with years of trigger time, Ryan Cleckner’s book will prove to be excellent reference material. Well written and easy to understand, it covers all the essential topics that a well-rounded shooter needs to master.”
In this video, Ryan Cleckner reviews proper technique for rifle shooters. A stable platform, sight alignment, sight picture, and trigger control are key fundamentals to shooting properly.
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File photo showing Kestrel 5700 Elite. See video below for 6.5 Creedmoor rifle.
It’s not easy to place a first shot on target at 1500 yards. You must measure the wind speed with precision, know your exact muzzle velocity, and have a sophisticated ballistics solver. In this short video from Ryans Range Report, the shooter manages a first-round hit on a steel silhouette at 1500 yards. He used a Kestrel 4500 NV Weather Meter with Applied Ballistics software to figure out the trajectory for his 6.5 Creedmoor rounds.
The Kestrel recorded a wind velocity, and the internal software calculated a solution of 17 Mils elevation (that’s 928 inches of drop) with 2.5 Mils windage. “Bang” — the shooter sends it, and 2.6 seconds later “Clang” he had a hit (flight time was 2.6 seconds). Bryan Litz observes: “This is the science of accuracy (in the form of an Applied Ballistics Kestrel) being put to good use at 1500 yards”.
Later in the video (1:05-1:15) the shooter places three rounds on steel at 1000 yards in just 10 seconds. The three shots all fall within 10″ or so — pretty impressive for rapid fire. The shooter reports: “[In my 6.5 Creedmoor] I’m using a 136gr Lapua Scenar L. This bullet has impressed me. It screams out of my barrel at 2940 fps and holds on all the way out to 1,500 yards.”
The rifle was built by Aaron Roberts of Roberts Precision Rifles (RPRifles.com). Chambered for the 6.5 Creedmoor, it features a Leupold Mark VI 3-18x44mm scope.
Roberts Precision Rifles
19515 Wied Rd. Suite D
Spring, Texas 77388
Phone: 281-651-5593
Email: rprifles @ gmail.com
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Bryan Litz, founder of Applied Ballistics LLC, has a very informativeFacebook page where he regularly posts useful ballistics info and shooting tips. We recommend that Facebook users check out the Bryan Litz Ballistics Facebook page. Here is one interesting example from that page. Bryan analyzes the Crosswind Weighting Factor (CWF). The Crosswind Weighting Factor (CWF) shows where a bullet’s trajectory is most susceptible to wind. By understanding CWF, shooters can better predict how wind affects bullet flight, especially at extreme ranges, when the projectile has gone transonic.
Crosswind Weighting Factor (CWF) graphs show where bullet trajectories are most susceptible to wind.
Where does the wind have the most effect?
At the shooter?
At the target?
Halfway?
Bryan Litz explains: “Out through the supersonic range, the CWF is maximum at the shooter. However as the trajectory extends into transonic, the max CWF gets pushed down range. That’s because the greatest segments of lag time in the bullets trajectory are at transonic where the drag coefficient is maximized around Mach 1.” [Editor: So if your bullet stays fully supersonic during its flight to your target, you can normally expect the CWF to be highest at your shooting station. But once the projectile drops into transonic speeds then the situation changes.]
Get More Tips on Bryan Litz Ballistics Facebook Page
This post is from the new Bryan Litz Ballistics Facebook page. You can bookmark that page at www.Facebook.com/BryanLitzBallitics. Facebook users will want to check that page regularly for other advice from Bryan, American’s leading Ballistics expert and founder of Applied Ballistics LLC.
Applied Ballistics also offers a noteworthy online training operation — The Science of Accuracy Academy. This will include podcasts, exclusive seminars, and access to the latest Applied Ballistics research.
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This is one of the very best books ever published about Long Range shooting. Based on sophisticated testing and research, this 356-page hardcover from Applied Ballistics offers important insights you won’t find anywhere else. Modern Advancements in Long Range Shooting – Volume II, a major treatise from Bryan Litz, is chock full of information, much of it derived through sophisticated field testing. As Chief Ballistician for Berger Bullets (and a trained rocket scientist), author Bryan Litz is uniquely qualified. Bryan is also an ace sling shooter and a past F-TR National Champion. Moreover, Bryan’s company, Applied Ballistics, has been a leader in the Extreme Long Range (ELR) discipline.
AUDIO FILE: Bryan Litz Talks about Modern Advancements in Long Range Shooting, Volume 2. (Sound file loads when you click button).
Volume II of Modern Advancements in Long Range Shooting ($44.95) contains all-new content derived from research by Applied Ballistics. Author Bryan Litz along with contributing authors Nick Vitalbo and Cal Zant use the scientific method and careful testing to answer important questions faced by long range shooters. In particular, this volume explores the subject of bullet dispersion including group convergence. Advanced hand-loading subjects are covered such as: bullet pointing and trimming, powder measurement, flash hole deburring, neck tension, and fill ratio.
Each topic is explored with extensive live fire testing, and the resulting information helps to guide hand loaders in a deliberate path to success. The current bullet library of measured G1 and G7 ballistic coefficients is included as an appendix. This library currently has data on 533 bullets in common use by long range shooters.
Bryan tells us that one purpose of this book is to dispel myths and correct commonly-held misconceptions: “Modern Advancements in Long Range Shooting aims to end the misinformation which is so prevalent in long range shooting. By applying the scientific method and taking a Myth Buster approach, the state of the art is advanced….”
Bullet Dispersion and Group Convergence
Part 1 of this Volume is focused on the details of rifle bullet dispersion. Chapter 1 builds a discussion of dispersion and precision that every shooter will benefit from in terms of understanding how it impacts their particular shooting application. How many shots should you shoot in a group? What kind of 5-shot 100 yard groups correlate to average or winning precision levels in 1000 yard F-Class shooting?
Chapter 2 presents a very detailed investigation of the mysterious concept of group convergence, which is the common idea that some guns can shoot smaller (MOA) groups at longer ranges. This concept is thoroughly tested with extensive live fire, and the results answer a very important question that has baffled shooters for many generations.
Part 2 of this Volume is focused on various aspects of advanced hand-loading. Modern Advancements (Vol. II) employs live fire testing to answer the important questions that precision hand loaders are asking. What are the best ways to achieve MVs with low ES and SD? Do flash hole deburring, neck tension, primer selection, and fill ratio and powder scales sensitivity make a difference and how much? All of these questions are explored in detail with a clear explanation of test results.
One of the important chapters of Part 2 examines bullet pointing and trimming. Applied Ballistics tested 39 different bullet types from .224 through .338 caliber. Ten samples of each bullet were tested for BC in each of the following configurations: original out of the box, pointed, trimmed, pointed and trimmed. The effect on the average BC as well as the uniformity in BC was measured and tabulated, revealing what works best.
Part 3 covers a variety of general research topics. Contributing author Nick Vitalbo, a laser technology expert, tested 22 different laser rangefinders. Nick’s material on rangefinder performance is a landmark piece of work. Nick shows how shooters can determine the performance of a rangefinder under various lighting conditions, target sizes, and reflectivities.
Chapter 9 is a thorough analysis of rimfire ammunition. Ballistic Performance of Rifle Bullets, 2nd Edition presented live fire data on 95 different types of .22 rimfire ammunition, each tested in five different barrels having various lengths and twist rates. Where that book just presented the data, Chapter 9 of this book offers detailed analysis of all the test results and shows what properties of rimfire ammunition are favorable, and how the BCs, muzzle velocities and consistency of the ammo are affected by the different barrels.
Chapter 10 is a discussion of aerodynamic drag as it relates to ballistic trajectory modeling. You will learn from the ground up: what an aerodynamic drag model is, how it’s measure and used to predict trajectories. Analysis is presented which shows how the best trajectory models compare to actual measured drop in the real world.
Finally, contributing author Cal Zant of the Precision Rifle Blog presents a study of modern carbon fiber-wrapped barrels in Chapter 11. The science and technology of these modern rifle barrels is discussed, and then everything from point of impact shift to group sizes are compared for several samples of each type of barrel including standard steel barrels.
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Emil Praslick III is widely recognized as one of the greatest wind wizards on the planet — a master at identifying wind value and direction, and predicting wind cycles. As coach of the USAMU and top civilian teams, Emil has helped win many high-level championships. In the three videos we feature today, Emil, who works with Capstone Precision Group (Berger, Lapua, SK, Vihtavuori) and Team Applied Ballistics, explains how to determine wind direction and velocity using a variety of indicators. Praslick, now retired from the U.S. Army, was an 18-time National and 2-time World Champion coach with the USAMU.
Video ONE: Wind Theory Basics — Understanding “Wind Values”
In this video from UltimateReloader.com, Emil explains the basics of modern wind theory. To properly understand the effect of the wind you need to know both the velocity of the wind and its angle. The combination of those variables translates to the wind value. Emil also explains that the wind value may not be constant — it can cycle both in speed and velocity. Emil also explains some of the environmental conditions such as mirage that can reveal wind conditions.
Video TWO: Determining the Direction of the Wind
Key Point in Video — Find the Boil
Emil explains how to determine wind direction using optic. The method is to use spotting scope, riflescope, or binoculars to look for the “Boil” — the condition in mirage when the light waves rising straight up. The wind will generate that straight-up, vertical boil in your optics when it is blowing directly at you, or directly from your rear. To identify this, traverse your scope or optics until you see the boil running straight up. When you see that vertical boil, the direction your optic is pointing is aligned with the wind flow (either blowing towards you or from directly behind you).
Video THREE: The No Wind Zero Setting
In this second video, Emil defines the “No-Wind Zero”, and explains why competitive shooters must understand the no-wind zero and have their sights or optics set for a no-wind zero starting point before heading to a match. In order to hit your target, after determining wind speed and direction, says Emil, “you have to have your scope setting dialed to ‘no wind zero’ first.”
Coach of Champions — Emil Praslick III
SFC Emil Praslick III, (U.S. Army, retired) works with Berger Bullets and Applied Ballistics. Emil served as the Head Coach of the U.S. National Long Range Rifle Team and Head Coach of the USAMU for several years. Teams coached by Emil have won 33 Inter-Service Rifle Championships. On top of that, teams he coached set 18 National records and 2 World Records. Overall, in the role of coach, Praslick can be credited with the most team wins of any coach in U.S. Military history.
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You have probably watched one of the excellent shooting sports videos Ryan Cleckner has done for the NSSF. Ryan’s Understanding Minute of Angle (MOA) video (see below) has been viewed over 3.4 million times! Ryan is noted for his ability to explain complex topics in an easy-to-comprehend manner.
Cleckner has also authored a hugely popular book, the Long Range Shooting Handbook, which expands on the topics covered in his popular video series. This book is the #1 Best Seller on Amazon in its category. You can view Sample Chapters from Ryan’s book — just click “Look Inside” on the Amazon product page.
As a long-range shooting expert, Ryan Cleckner has impressive credentials. Cleckner was a special operations sniper (1/75 Rgr) with multiple combat deployments, and he has served a U.S. Army sniper instructor. Currently he works as a firearms industry executive and attorney.
The Long Range Shooting Handbook is divided into three main categories: What It Is/How It Works, Fundamentals, and How to Use It. “What It Is/How It Works” covers equipment, terminology, and basic principles. “Fundamentals” covers the theory of long range shooting. “How to Use It” gives practical advice on implementing what you’ve learned, so you can progress as a skilled, long range shooter.
Ryan Cleckner’s best-selling Long Range Shooting Handbook is designed as an introduction to important fundamental concepts such as MOA vs. MILs, External Ballistics, and Environmental Effects. Included are personal tips and advice based on Cleckner’s years of experience as a sniper instructor and special operations sniper.
Iain Harrison, editor of Recoil Magazine, said: “Whether you’re looking to dip a toe into the complex world of long range shooting, or you’re a seasoned shooter with years of trigger time, Ryan Cleckner’s book will prove to be excellent reference material. Well written and easy to understand, it covers all the essential topics that a well-rounded shooter needs to master.”
In this video, Ryan Cleckner reviews proper technique for rifle shooters. A stable platform, sight alignment, sight picture, and trigger control are key fundamentals to shooting properly.
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A Canadian F-Class shooter (who shall remain nameless) was surprised when he saw this “flat-line” target displayed from a ShotMarker system. That’s 30 shots with almost no vertical at all. So what gives? The ShotMarker uses acoustic sensors to plot shot location. It is normally accurate to within a few millimeters. The shooter posted: “I’ve never had this happen before with a waterline. This is myself and another shooter, 30 rounds total, including four sighters at 900 meters in super strong winds that twitched back and forth every minute.”
So what happened? It turns our that the system’s wires were not connected correctly. AccurateShooter IT expert (and top F-Class Shooter) Jay Christopherson posted: “The wires are connected incorrectly… you’ve got the sensors crossed”. This ShotMarker system error can be diagnosed by doing a “tap test” as explained by Cal Waldner: “Thats a crossed sensor wire! That’s why a tap test needs to be done every time you rig the equipment. If a wire is crossed then you will catch it on the tap test.”
Other folks who viewed this target photo on Facebook said that they have seen a similar problem, so this is NOT an uncommon fault:
“Yup, my club had the same issue (and results) in an early outing with one of our ShotMarker units. The system reads the target area as a horizontal rectangle not as a square.” — Laurie Holland.
“I have seen this exact same result with the sensors plugged incorrectly.” — Dino Christopoulos
“This happened to several people at one match early on. Sensors crossed.” — Jen Bondurant
“I thought I was shooting a great waterline once [but the] wires were crossed — [a mistake from] setting up in the dark.”– Jerry Stephenson
The ShotMarker System — Technology and Performance
The ShotMarker was invented by Adam McDonald, a brilliant young Canadian who also created the AutoTrickler. The ShotMarker is an advanced system for plotting shot impacts on targets using acoustic sensors placed in the four corners of the target frame. The central Sensor Hub at each target transmits to the Access Point at the firing line using LoRa, a low frequency RF protocol. Unlike Wifi, this power-efficient design works at over 2 miles and provides hassle-free connectivity even without direct line of sight.
The sensor unit in each corner of your frame contains two precision MEMS ultrasonic microphones which are capable of measuring a supersonic bullet within 1mm – when the frame is perfectly still.
Real-world accuracy will be limited by motion of the sensors and the air while shots are being detected. Typically, every shot will be reported within a few millimeters, with ideal performance being realized on a stable frame in calm conditions.
Shooting Industry magazine just released its latest April 2022 edition. You can read the full digital version on the web for free. This April issue contains an interesting article about long-range and PRS/NRL shooting equipment, and the current market for high-end tactical-style rifles and optics.
Shooting Industry’sEquipping Today’s Long-Range Customer article explains that customers in the long-range tactical market are prepared to spend serious bucks, but they demand high-quality gear that will last: “Those shooters who get serious about the [long-range shooting] sport can spend $10,000 or more on a rifle/optic combo. This is before adding accessories like bipods, Kestrel meters and rangefinders. Even an ‘entry level’ setup can set a customer back $2,000 – $3,000. So, while your average shopper might balk at the idea of spending as much on an optic as they do the rifle, things are different with this crowd” because they have done their homework.
“When people decide to step into the sport, they know they’re going to spend money. They don’t want to buy cheap” said A.J. Hoffman of SoDak Sports in South Dakota. Those who try to succeed at long range with low-end components “are likely to end up regretting the decision” — after gaining a better understanding of what it takes to hit targets at 1,000 yards and beyond.
Here are some recommended products featured in the article:
ZEISS LRP S5 318-50 FFP Scope
This new ZEISS LRP S5 318-50 First Focal Plane (FFP) optic offers the widest vertical adjustment range on the market — a full 140 MOA or 40.7 Milrads. We recently reviewed the bigger brother of this 3-18X power optic, the new ZEISS LRP S5 525-56 scope. Our tester said the 5-25x56mm ZEISS S5 offered great, precise turrets and very sharp glass. And the 5X magnification range gives the scope great versatility, from close-range to one mile and beyond.
WOOX Cobra Thumbhole Stock
Shooting Industry magazine states that “The unique ergonomics of the Cobra Thumbhole Precision stock from WOOX reduces felt recoil to help the shooter… while on the firing line.” We like the modern, adjustable design, with laminated wood on the grip and handguard. This provides the advantages of a contemporary tactical stock with the comfortable feel of wood. This WOOX stock features an adjustable comb, and rear underside Pic rail, and a forearm that can mount various accessories.
Vortex Razor HD Gen III 6-36x56mm FFP
Another popular optic for long range tactical shooters is the Vortex Razor HD Gen III 6-36x56mm FFP. This is a very durable optic with an impressive 6X zoom range. The upper 36X power is effective to see small targets at long distances.
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There’s a good episode of Gun Talk Radio this Sunday, 2/27/2022. This week’s lead guest is respected author and former U.S. Army sniper instructor Ryan Cleckner. Host Tom Gresham and Cleckner discuss hunting, long range shooting, and tactical training. Ryan Cleckner is the author of the best-selling Long Range Shooting Handbook.
Effective Rifle Training with Ryan Cleckner
Along with his written work, Ryan Cleckner has created many good shooting videos for the NSSF, such as his excellent Understanding MOA Video. He also produces content for GunUniversity.com. Ryan is noted for his ability to explain complex topics in an easy-to-comprehend manner. This video below, covering the fundamentals of shooting, has been viewed over 2.9 million times. It’s worth watching, particularly for guys getting started in PRS/practical competitions.
In this video, Ryan Cleckner reviews proper technique for rifle shooters. A stable platform, sight alignment, sight picture, and trigger control are key fundamentals to shooting properly.
Tip on Viewing Your Reticle:
Cleckner: “Sometimes it can be difficult to focus between the target and the reticle, even with the parallax adjusted properly. I recommend you focus only on the reticle. Just like the front sight on a rifle or a handgun, that reticle is what you can control, and it’s what matters. Focus on a crisp, clear reticle, in a stable platform, and all that’s left is trigger control.”
Tip on Trigger Control:
Cleckner: “Trigger control is pretty straightforward, as long as you think about it as a continuous process, and not just one thing that happens. I like to think about it as drawing a line in the dirt. I like to think about this constant pressure that I’m adding as I draw this line straight back, and then… continuing to draw that line even as the rifle goes off. That’s the good follow-through you’ll need.”
Long Range Shooting Handbook — A Good Resource
Ryan Cleckner’s Long Range Shooting Handbook is designed as an introduction to important fundamental concepts such as MOA vs. Mils, External Ballistics, and Environmental Effects. It also include advice on shooting positions, and gun handling. Included are personal tips and advice based on Cleckner’s years of experience as a sniper instructor and special operations sniper.
The Long Range Shooting Handbook is divided into three main categories: What It Is/How It Works, Fundamentals, and How to Use It. “What It Is/How It Works” covers equipment, terminology, and basic principles. “Fundamentals” covers the theory of long range shooting. “How to Use It” gives practical advice on implementing what you’ve learned, so you can progress as a skilled, long range shooter. You can view Sample Chapters from Ryan’s Book on Amazon.com.
Gun Talk Radio — Podcast Archive
If you miss the live show broadcast on Sunday, past broadcasts can be heard online via the GUNTALK PODCAST Site and Apple iTunes. The Gun Talk Podcast Archive has hundreds of past shows you can access via the internet. Here’s an informative, recent podcast relating to optics purchasing and scope installation.
Gun Talk Podcast from 2/20/2022 — How Much to Pay for Optics
All Gun Talk shows are also archived as podcasts for download or online listening. Gun Talk is also available on YouTube, Roku, Apple TV, Amazon Fire TV, and GunTalk.com.
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Emil Praslick III is widely recognized as one of the greatest wind wizards on the planet — a master at identifying wind value and direction, and predicting wind cycles. As coach of the USAMU and top civilian teams, Emil has helped win many high-level championships. In the three videos we feature today, Emil, who works with Capstone Precision Group (Berger, Lapua, SK, Vihtavuori) and Team Applied Ballistics, explains how to determine wind direction and velocity using a variety of indicators. Praslick, now retired from the U.S. Army, was an 18-time National and 2-time World Champion coach with the USAMU.
Video ONE: Wind Theory Basics — Understanding “Wind Values”
In this video from UltimateReloader.com, Emil explains the basics of modern wind theory. To properly understand the effect of the wind you need to know both the velocity of the wind and its angle. The combination of those variables translates to the wind value. Emil also explains that the wind value may not be constant — it can cycle both in speed and velocity. Emil also explains some of the environmental conditions such as mirage that can reveal wind conditions.
Video TWO: Determining the Direction of the Wind
Key Point in Video — Find the Boil
Emil explains how to determine wind direction using optic. The method is to use spotting scope, riflescope, or binoculars to look for the “Boil” — the condition in mirage when the light waves rising straight up. The wind will generate that straight-up, vertical boil in your optics when it is blowing directly at you, or directly from your rear. To identify this, traverse your scope or optics until you see the boil running straight up. When you see that vertical boil, the direction your optic is pointing is aligned with the wind flow (either blowing towards you or from directly behind you).
Video THREE: The No Wind Zero Setting
In this second video, Emil defines the “No-Wind Zero”, and explains why competitive shooters must understand the no-wind zero and have their sights or optics set for a no-wind zero starting point before heading to a match. In order to hit your target, after determining wind speed and direction, says Emil, “you have to have your scope setting dialed to ‘no wind zero’ first.”
Coach of Champions — Emil Praslick III
SFC Emil Praslick III, (U.S. Army, retired) works with Berger Bullets and Applied Ballistics. Emil served as the Head Coach of the U.S. National Long Range Rifle Team and Head Coach of the USAMU for several years. Teams coached by Emil have won 33 Inter-Service Rifle Championships. On top of that, teams he coached set 18 National records and 2 World Records. Overall, in the role of coach, Praslick can be credited with the most team wins of any coach in U.S. Military history.
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The digital archives of Shooting Sports USA magazine (SSUSA) features an Expert Forum on Wind Reading. This outstanding article on wind reading starts off with a section by ballistics guru Bryan Litz, author of Applied Ballistics for Long-Range Shooting. Then four of the greatest American shooters in history share their personal wind wisdom. Lanny Basham (Olympic Gold Medalist, author, Winning in the Wind), Nancy Tompkins (Past National HP Champion, author, Prone and Long-Range Rifle Shooting), David Tubb (11-Time Camp Perry National Champion), and Lones Wigger (Olympic Hall of Fame) all offer practical wind-reading lessons learned during their shooting careers.
Whether you shoot paper at Perry or prairie dogs in the Dakotas, this is a certified “must-read” resource on reading the wind. Here is a sample selection from the article:
Shooting Sports USA magazine (SSUSA) has a modern, mobile-friendly website with tons of great content. Log on to www.ssusa.org. There you’ll find current news stories as well as popular articles from the SSUSA archives. The SSUSA website also includes match reports, gear reviews, reloading advice, plus expert marksmanship tips from the USAMU.
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A Canadian F-Class shooter (who shall remain nameless) was surprised when he saw this “flat-line” target displayed from a ShotMarker system. That’s 30 shots with almost no vertical at all. So what gives? The ShotMarker uses acoustic sensors to plot shot location. It is normally accurate to within a few millimeters. The shooter posted: “I’ve never had this happen before with a waterline. This is myself and another shooter, 30 rounds total, including four sighters at 900 meters in super strong winds that twitched back and forth every minute.”
So what happened? It turns our that the system’s wires were not connected correctly. AccurateShooter IT expert (and top F-Class Shooter) Jay Christopherson posted: “The wires are connected incorrectly… you’ve got the sensors crossed”. This ShotMarker system error can be diagnosed by doing a “tap test” as explained by Cal Waldner: “Thats a crossed sensor wire! That’s why a tap test needs to be done every time you rig the equipment. If a wire is crossed then you will catch it on the tap test.”
Other folks who viewed this target photo on Facebook said that they have seen a similar problem, so this is NOT an uncommon fault:
“Yup, my club had the same issue (and results) in an early outing with one of our ShotMarker units. The system reads the target area as a horizontal rectangle not as a square.” — Laurie Holland.
“I have seen this exact same result with the sensors plugged incorrectly.” — Dino Christopoulos
“This happened to several people at one match early on. Sensors crossed.” — Jen Bondurant
“I thought I was shooting a great waterline once [but the] wires were crossed — [a mistake from] setting up in the dark.”– Jerry Stephenson
The ShotMarker System — Technology and Performance
The ShotMarker was invented by Adam McDonald, a brilliant young Canadian who also created the AutoTrickler. The ShotMarker is an advanced system for plotting shot impacts on targets using acoustic sensors placed in the four corners of the target frame. The central Sensor Hub at each target transmits to the Access Point at the firing line using LoRa, a low frequency RF protocol. Unlike Wifi, this power-efficient design works at over 2 miles and provides hassle-free connectivity even without direct line of sight.
The sensor unit in each corner of your frame contains two precision MEMS ultrasonic microphones which are capable of measuring a supersonic bullet within 1mm – when the frame is perfectly still.
Real-world accuracy will be limited by motion of the sensors and the air while shots are being detected. Typically, every shot will be reported within a few millimeters, with ideal performance being realized on a stable frame in calm conditions.
It’s not easy to place a first shot on target at 1500 yards. You must measure the wind speed with precision, know your exact muzzle velocity, and have a sophisticated ballistics solver. In this short video from 
Part 2 of this Volume is focused on various aspects of advanced hand-loading. Modern Advancements (Vol. II) employs live fire testing to answer the important questions that precision hand loaders are asking. What are the best ways to achieve MVs with low ES and SD? Do flash hole deburring, neck tension, primer selection, and fill ratio and powder scales sensitivity make a difference and how much? All of these questions are explored in detail with a clear explanation of test results.
