The Coriolis Effect comes into play with extreme long-range shots like this (2100 yards at Raton, New Mexico). The rotation of the earth actually moves the target a small distance (in space) during the long duration of the bullet’s flight.
When you’re out at the range, the Earth seems very stable. But it is actually a big sphere zooming through space while spinning around its axis, one complete turn every 24 hours. The rotation of the earth can create problems for extreme long-range shooters. During extended bullet flight times, the rotation of the planet causes an apparent deflection of the bullet path over very long distances. This is the ballistics manifestation of the Coriolis Effect.
Bryan Litz of Applied Ballistics discusses and explains the Coriolis Effect in his Ballistics Books and Seminars. Bryan notes that Coriolis is “a very subtle effect. People like to make more of it than it is because it seems mysterious.” In most common shooting situations inside 1K, Coriolis is not important. At 1000 yards, the Effect represents less than one click (for most cartridge types). Even well past 1000 yards, in windy conditions, the Coriolis Effect may well be “lost in the noise”. But in very calm conditions, when shooting at extreme ranges, Bryan says you can benefit from adjusting your ballistics solution for Coriolis.
Bryan explains: “The Coriolis Effect… has to do with the spin of the earth. You are basically shooting from one point to another on a rotating sphere, in an inertial reference frame. The consequence of that is that, if the flight time of the bullet gets significantly long, the bullet can have an apparent drift from its intended target. The amount [of apparent drift] is very small — it depends on your latitude and azimuth of fire on the planet.”
Coriolis is a very subtle effect. With typical bullet BCs and velocities, you must get to at least 1000 yards before Coriolis amounts to even one click. Accordingly, Bryan advises: “Coriolis Effect is NOT something to think about on moving targets, it is NOT something to think about in high, uncertain wind environments because there are variables that are dominating your uncertainty picture, and the Coriolis will distract you more than the correction is worth.”
“Where you could think about Coriolis, and have it be a major impact on your hit percentage, is if you are shooting at extended range, at relatively small targets, in low-wind conditions. Where you know your muzzle velocity and BC very well, [and there are] pristine conditions, that’s where you’re going to see Coriolis creep in. You’ll receive more refinement and accuracy in your ballistics solutions if you account for Coriolis on those types of shots. But in most practical long-range shooting situations, Coriolis is NOT important. What IS important is to understand is when you should think about it and when you shouldn’t, i.e. when applying it will matter and when it won’t.”
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The Coriolis Effect comes into play with extreme long-range shots like this (2100 yards at Raton, New Mexico). The rotation of the earth actually moves the target a small distance (in space) during the long duration of the bullet’s flight.
When you’re out at the range, the Earth seems very stable. But it is actually a big sphere zooming through space while spinning around its axis, one complete turn every 24 hours. The rotation of the earth can create problems for extreme long-range shooters. During extended bullet flight times, the rotation of the planet causes an apparent deflection of the bullet path over very long distances. This is the ballistics manifestation of the Coriolis Effect.
Bryan Litz of Applied Ballistics discusses explains the Coriolis Effect in his Ballistics Books and Seminars. Bryan notes that Coriolis is “a very subtle effect. People like to make more of it than it is because it seems mysterious.” In most common shooting situations inside 1K, Coriolis is not important. At 1000 yards, the Effect represents less than one click (for most cartridge types). Even well past 1000 yards, in windy conditions, the Coriolis Effect may well be “lost in the noise”. But in very calm conditions, when shooting at extreme ranges, Bryan says you can benefit from adjusting your ballistics solution for Coriolis.
Bryan explains: “The Coriolis Effect… has to do with the spin of the earth. You are basically shooting from one point to another on a rotating sphere, in an inertial reference frame. The consequence of that is that, if the flight time of the bullet gets significantly long, the bullet can have an apparent drift from its intended target. The amount [of apparent drift] is very small — it depends on your latitude and azimuth of fire on the planet.”
Coriolis is a very subtle effect. With typical bullet BCs and velocities, you must get to at least 1000 yards before Coriolis amounts to even one click. Accordingly, Bryan advises: “Coriolis Effect is NOT something to think about on moving targets, it is NOT something to think about in high, uncertain wind environments because there are variables that are dominating your uncertainty picture, and the Coriolis will distract you more than the correction is worth.”
“Where you could think about Coriolis, and have it be a major impact on your hit percentage, is if you are shooting at extended range, at relatively small targets, in low-wind conditions. Where you know your muzzle velocity and BC very well, [and there are] pristine conditions, that’s where you’re going to see Coriolis creep in. You’ll receive more refinement and accuracy in your ballistics solutions if you account for Coriolis on those types of shots. But in most practical long-range shooting situations, Coriolis is NOT important. What IS important is to understand is when you should think about it and when you shouldn’t, i.e. when applying it will matter and when it won’t.”
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Do you use an AR15 for service rifle, 3-Gun, or tactical competitions? Then you should consider dry-fire training. Many top competitors spend an hour (or more) dry-firing for every minute they shoot live cartridges in competition. The allows effective training without spending a fortune on live ammunition (which can run $1.00 per round or more).
There is a handy new system that resets the trigger on AR-platform rifles — the Mantis Blackbeard (see videos below). This permits you to make multiple successive shots without having to alter your grip and manually recycle the charging handle. This two-part system employs a replacement bolt carrier/bolt and replacement magazine. With these two components installed, your AR can automatically reset the trigger instantly after you pull the trigger. It works, it’s effective, and it’s affordable at $219.00 MSRP.
The Blackbeard system is used by the U.S. Marine Corps and U.S. Army (including Special Forces), so you know it works. During training the Mantis Blackbeard allows unlimited, repetitive Dry Firing without resetting the charging handle. That eliminates a tedious task that requires altering your hold on the rifle.
No Gun Modifications
Same Trigger Weight, Break, and Reset
Installs in under a minute
Up to 10 shots per second
Up to 100,000 Shots per Charge
Save on Ammunition Costs
In the video below Top Shot Champion Dustin Ellermann shows how to use the Mantis Blackbeard. He vividly demonstrates the clear advantage of the Blackbeard compared to manually pulling the charging handle over and over (See 00:02 – 00:20 time).
Dustin Ellermann Review of Mantis Blackbeard Trigger Reset System
This next video, from the manufacturer Mantis, shows how to install the Mantis Blackbeard, how to set the zero, and how to operate the unit with your AR-platform rifle.
The easy-to-install-Mantis Blackbeard replaces your bolt carrier and magazine in less than a minute, allowing easy training transitions. The magazine battery pack is good for 100,000 shots per charge and the Blackbeard is rated to reset as quickly as 10 shots per second, allowing rapid fire training for 3-Gun and tactical competitions.
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The Coriolis Effect comes into play with extreme long-range shots like this (2100 yards at Raton, NM). The rotation of the earth actually moves the target a small distance (in space) during the long duration of the bullet’s flight.
When you’re out at the range, the Earth seems very stable. But it is actually a big sphere zooming through space while spinning around its axis, one complete turn every 24 hours. The rotation of the earth can create problems for extreme long-range shooters. During extended bullet flight times, the rotation of the planet causes an apparent deflection of the bullet path over very long distances. This is the ballistics manifestation of the Coriolis Effect.
Bryan Litz of Applied Ballistics discusses explains the Coriolis Effect in his Ballistics Books and Seminars. Bryan notes that Coriolis is “a very subtle effect. People like to make more of it than it is because it seems mysterious.” In most common shooting situations inside 1K, Coriolis is not important. At 1000 yards, the Effect represents less than one click (for most cartridge types). Even well past 1000 yards, in windy conditions, the Coriolis Effect may well be “lost in the noise”. But in very calm conditions, when shooting at extreme ranges, Bryan says you can benefit from adjusting your ballistics solution for Coriolis.
Bryan explains: “The Coriolis Effect… has to do with the spin of the earth. You are basically shooting from one point to another on a rotating sphere, in an inertial reference frame. The consequence of that is that, if the flight time of the bullet gets significantly long, the bullet can have an apparent drift from its intended target. The amount [of apparent drift] is very small — it depends on your latitude and azimuth of fire on the planet.”
Coriolis is a very subtle effect. With typical bullet BCs and velocities, you must get to at least 1000 yards before Coriolis amounts to even one click. Accordingly, Bryan advises: “Coriolis Effect is NOT something to think about on moving targets, it is NOT something to think about in high, uncertain wind environments because there are variables that are dominating your uncertainty picture, and the Coriolis will distract you more than the correction is worth.”
“Where you could think about Coriolis, and have it be a major impact on your hit percentage, is if you are shooting at extended range, at relatively small targets, in low-wind conditions. Where you know your muzzle velocity and BC very well, [and there are] pristine conditions, that’s where you’re going to see Coriolis creep in. You’ll receive more refinement and accuracy in your ballistics solutions if you account for Coriolis on those types of shots. But in most practical long-range shooting situations, Coriolis is NOT important. What IS important is to understand is when you should think about it and when you shouldn’t, i.e. when applying it will matter and when it won’t.”
The Coriolis Effect — General Physics
The Coriolis Effect is the apparent deflection of moving objects when the motion is described relative to a rotating reference frame. The Coriolis force acts in a direction perpendicular to the rotation axis and to the velocity of the body in the rotating frame and is proportional to the object’s speed in the rotating frame.
A commonly encountered rotating reference frame is the Earth. The Coriolis effect is caused by the rotation of the Earth and the inertia of the mass experiencing the effect. Because the Earth completes only one rotation per day, the Coriolis force is quite small, and its effects generally become noticeable only for motions occurring over large distances and long periods of time. This force causes moving objects on the surface of the Earth to be deflected to the right (with respect to the direction of travel) in the Northern Hemisphere and to the left in the Southern Hemisphere. The horizontal deflection effect is greater near the poles and smallest at the equator, since the rate of change in the diameter of the circles of latitude when travelling north or south, increases the closer the object is to the poles. (Source: Wikipedia)
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Top Shot former Champion Dustin Ellerman likes his Volquartsens, and we can see why. With his latest 17 HMR rimfire varminter, he’s seen some outstanding accuracy with CCI ammo. On his Facebook page, Dustin reports: “Prepping for prairie dogs and I’m floored by this cold, sub-half-inch group shot with the Volquartsen Custom 17 HMR at 100 yards.” This thumbhole-stock rifle features a Bowers Group USS suppressor, and 3-12x56mm Meopta Scope. Dustin tried different types of CCI 17 HMR ammo. This small group was shot with CCI A17 ammo.
A couple years back Dustin took another Volquartsen 17 HMR on a Prairie Dog hunt in Wyoming. He was impressed with the rifle (shown below) and the little rimfire cartridge. Dustin says the effective range of the 17 HMR is farther than one might expect: “I made hits out to 300 yards. 200 yards was easy as long as the wind wasn’t too bad.”
Here’s the Volquartsen 17 HMR Dustin used in Wyoming in 2015:
After that 2015 P-Dog expedition, Dustin became a fan of the 17 HMR cartridge: “Never paid it much attention before now because the ammo is five times more expensive than .22 LR and I mostly target shoot. However, for prairie dogs, the 17 HMR is amazing!” Consider this — Hornady’s 17 HMR ammo pushes a 17gr V-Max bullet at 2550 fps, twice as fast as typical .22 LR rounds.
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What can happen when the bottom-most primer in a primer feed tube goes off? A big bang, that’s what. Some or all of the primers in the vertical feeding tube can go off in a chain detonation. That’s exactly what happened to Dustin Ellermann, Top Shot Season 3 Champion. Scary experience, but thankfully Dustin was not injured. He writes: “Super thankful that I was wearing my Wiley X eye protection this weekend when I was reloading some .223 rounds. My press detonated nearly 100 small rifle primers. Shown here is the magazine feed tube. Not fun but it could have been much worse. Stay safe!”
When working with progressive reloading presses, you should definitely wear eye protection. Dustin’s chain detonation experience proves that — without a doubt. Remember you only have one set of eyes!
RCBS APS Strips — Alternative to Primer Tubes When you stack a column of primers in a single metal tube, you’re asking for trouble. As Dustin Ellermann learned, when one primer fires, the entire column can follow suit in a chain detonation. Thankfully, you do have options when it comes to primer feeding on a progressive press. RCBS developed an innovative primer system for its Pro-2000 progressive press. Instead of being stored in a vertical tube, primers are placed in flat, plastic “APS” strips, with a ring of plastic separating each primer. Moving horizontally, primers are never stacked, so the chance of a chain detonation is reduced dramatically. The re-usable APS strips are color-coded for different primer types. You can buy CCI “pre-loaded” primer strips, or you can insert any brand of primers into strips using an RCBS strip-loader tool.
RCBS Pro-2000 with APS Strip Priming System
AccurateShooter.com Editor Uses Strip Primers
This Editor owns an RCBS Pro-2000 progressive press. The RCBS strip-priming system was one key reason I selected the RCBS Pro-2000 over similar-priced progressives from Dillon and Hornady. I believe the strip primer system is safer, more positive, and easier to use. Before I purchased my RCBS progressive, I “road-tested” the competition. I loaded hundreds of rounds on each of four different progressives: Dillon 550B, Dillon 650, Hornady Lock-N-Load, and RCBS 2000. I was concerned about the primer feed tubes on the Dillons, and I found the RCBS rotary powder measure was much more precise (and easier to adjust) than the sliding bar system on the Dillon machines. The RCBS priming system was definitely more fool-proof than the system on the Hornady press (a first-generation L-N-L that had issues with primer feeding). After “test-driving” blue, red, and green brand progressives extensively, I settled on the RCBS Pro-2000. A decade later, I still think I made the right choice. I like the APS strips for big jobs, and I can also use them in the RCBS hand-priming tool (shown below). With the strips, it’s easy to prime 20 or 40 cases at a time, and then switch to another type of primer for comparison testing.
The APS priming system also works with press-mounted priming tool, bench-mounted tool, and APS hand-tool. EdLongRange uses the press-mounted tool: “I also like the APS approach but use the press-mounted unit (saves your hands/wrists — and I haven’t had a need for a progressive press in over 20 years). Loading the primers in the strips is a bit of a PITA but very manageable. As with all tools there is a learning curve.” CLICK HERE for video showing strip-loading tool and press-mounted APS tool. The press-mounted tool is no longer in production, but you can still BUY IT HERE.
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Here’s a cool Christmas Gift item — a high-quality 70-page coloring book featuring firearms. If you have kids or grandkids that enjoy shooting or hunting, this could be a fun, interactive gift. (Heck we know some adults who would enjoy it too.) Offered by Top Shot Champ Dustin Ellermann, Full Metal Coloring features quotes from famous people and shooting tips from ace shooters such as Jerry Miculek and Bryan Zins. The WideOpenSpaces Blog says: “Forget abstract designs or run-of-the-mill shapes. Instead, get your hands on this cool coloring book full of guns.” The price is $11.99.
Product Description: Filled with humor, history and iconic images, Full Metal Coloring appeals to military, veterans, shooting sports athletes and hunters. Amusing quotes by Aristotle, Walter Cronkite, Wyatt Earp and more. Shooting tips by Jerry Miculek, Brian Zins, Jim Henderson and more!
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Top Shot Champion Dustin Ellermann is not just a great shooter. He also directs a Christian-oriented youth program in Texas. In the spring of 2017, Dustin’s Camp His Way team will be offering weekend marksmanship camps for youngsters and teens. Dustin tells us that there are still a few spots available for the Kids’ Camps on February 25-26 and March 25-26, as well as the Teen Camp on March 11-12, 2017. These two-day Camps make a great holiday gift for youngsters. The programs are conducted at Camp His Way outside of Zavalla, Texas. For more information, visit Marksmancamp.com.
These weekend Marksmanship Camps are specially designed for kids aged 9-13 and teens 14-18. The Christian-oriented two-day camps focus on safety, marksmanship skills, and team building. Campers enjoy a host of fun skill-oriented activities: Airgun Shooting, Archery, Blowguns, Knife Throwing, Paintball Games, Slingshots, Tomahawk Throwing, and of course Rimfire Rifle Marksmanship with a variety of rifles. The Rimfire Rifle Marksmanship program features Volquartsen Custom Rifles, S&W M&P 15-22s, Ruger 10/22s, Savage bBolt Actions, and Henry Lever Actions.
The Kids’ (ages 9-13) Marksmanship Weekends cost $270. Teen (ages 14-18) Camps are $300.00. These fees include all ammo, equipment, meals, lodging, team t-shirt, and one adult guest spectator. Parents are welcome to attend and spectate, but participation in marksmanship activities is limited to the kids at this time. CLICK HERE to reserve a spot — a few openings are still available.
Notice the young campers always wear ear and eye protection when shooting firearms. That’s as it should be. We wish adult shooters, including benchrest, smallbore, High Power, and F-Class competitors, followed this important safety practice.
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Many of us dream of taking and making a shot at one mile (1760 yards). Well Top Shot Champion Dustin Ellermann pushed the envelope even farther during a recent ultra-long-range session at the NRA’s Whittington Center in New Mexico. On his Facebook page, Dustin wrote: “I earned the ‘One Mile+ Shot’ mancard this week with 1MOA Solutions. We reached out to 2,100 yards with the Barrett M99 .50 BMG out in the hills of the Whittington Center. You can see the target area marked in the center of the photo. This is a locked-down mountain range, with 30,000 acres.”
Bullet flight time was 3.7 seconds, drop was 94 MOA, velocity at target was only 1,100 fps. The 7,500′ elevation and a 5 degree down-slope helped the ballistics. Dustin reports: “About six seconds after impact you would hear the ‘ding’.” [Editor’s note: Yes it really takes roughly six seconds for sound to travel 2100 yards. The speed of sound at 7500′ elevation* is 1053.61 fps, or roughly 351.20 yards per second. The distance-to-target of 2100 yards divided by 351.2 works out to a 5.98 second time delay.]
One of Dustin’s friends commented: “We rarely think about what the bullet does after it exits, but seeing the 60% drop in velocity [over the trajectory] and how long it was actually in flight (3.7 seconds) makes these types of shots so amazing! Congrats to you making the One Mile + club!”
*This is with temperature corrected -30° F below standard at sea level.
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Top Shot Champion Dustin Ellermann has been busy up in Wyoming slaying varmints. On his Facebook Page, Dustin wrote: “I’ve been helping some ranchers out with their prairie dog infestation in Wyoming. The 17 HMR Volquartsen Custom is amazing! The Meopta Sports Optics R1r is super nice as well. Can you guess how many prairie dogs I eliminated in two days?” (Facebook users post guesses HERE.)
Dustin says the effective range of the 17 HMR is farther than one might expect: “I made hits out to 300 yards. 200 yards was easy as long as the wind wasn’t too bad.”
Dustin was very impressed with the 17 HMR cartridge: “Never paid it much attention before now because the ammo is five times more expensive than .22 LR and I mostly target shoot. However, for prairie dogs, the 17 HMR is amazing!” Dustin is now a fan of the speedy rimfire round. Consider this — Hornady’s 17 HMR ammo pushes a 17gr V-Max bullet at 2550 fps, twice as fast as typical .22 LR rounds.
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You probably know Dustin Ellermann from the Top Shot TV show. Dustin, a self-trained “natural” marksman, was the Season 3 Champion. You may not know that Dustin also runs a Christian Camp for young people, Camp His Way. One of the Camp’s special programs is a weekend marksmanship camp taught by Dustin.
Multi-Activity Marksmanship Camp
At these sessions, the young campers get to shoot, practice archery, throw tomahawks, ride horses, and even try out blow-guns. Dustin reports: “This past weekend we had another amazing Marksmanship Camp. We had a great group of campers and of course lots of fun shooting/throwing/riding/slinging! Thanks to all our sponsors for helping us make this weekend awesome: 5.11 Tactical, Elzetta Design, NextLevel Training, Volquartsen Custom, GhostTargets.com, Cold Steel and more.” CLICK for equipment list.
Notice the young campers always wear ear and eye protection when shooting firearms. That’s as it should be. We wish adult shooters, including benchrest, smallbore, High Power, and F-Class competitors, followed this important safety practice.
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Here’s a remarkable feat of accuracy. But this “trick shot” is not made with a rifle — it’s performed with a Tomahawk. Top Shot Season 3 Champion Dustin Ellermann shows off his “Tomahawk Sniper” skills by hitting a target at 60 feet. Flying over that distance, the Cold Steel Norse Hawk makes five full rotations before hitting the wood target. Dustin’s first throw planted solidly in the wood. That was impressive enough. But Dustin’s second throw hits dead-center, bursting the blue balloon. Ellermann’s tomahawk-tossing skills are impressive, but we do wonder what the Ballistic Coefficient (BC) of that spinning long-handled ‘hawk would be. Watch the video — we bet you’ll enjoy this.
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When you’re out at the range, the Earth seems very stable. But it is actually a big sphere zooming through space while spinning around its axis, one complete turn every 24 hours. The rotation of the earth can create problems for extreme long-range shooters. During extended bullet flight times, the rotation of the planet causes an apparent deflection of the bullet path over very long distances. This is the ballistics manifestation of the Coriolis Effect.
When you stack a column of primers in a single metal tube, you’re asking for trouble. As Dustin Ellermann learned, when one primer fires, the entire column can follow suit in a chain detonation. Thankfully, you do have options when it comes to primer feeding on a progressive press. RCBS developed an innovative primer system for its Pro-2000 progressive press. Instead of being stored in a vertical tube, primers are placed in flat, plastic “APS” strips, with a ring of plastic separating each primer. Moving horizontally, primers are never stacked, so the chance of a chain detonation is reduced dramatically. The re-usable APS strips are color-coded for different primer types. You can buy CCI “pre-loaded” primer strips, or you can insert any brand of primers into strips using an RCBS strip-loader tool.
Top Shot Champion Dustin Ellermann has been busy up in Wyoming slaying varmints. On his 
You probably know Dustin Ellermann from the Top Shot TV show. Dustin, a self-trained “natural” marksman, was the Season 3 Champion. You may not know that Dustin also runs a Christian Camp for young people, 
