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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At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
This week we mark a special milestone — our 400th BargainFinder Deals of the Week! That works out to 7.7 YEARS of bargains, promos, and discounts. To mark our 400th Week of Hot Deals, we are doubling the number of deals listed, for a total of TWENTY deals — all under $400.00.
The Frankford Arsenal Intellidropper powder scale/dispenser has earned positive owner reviews. This unit is FAST, and you can program your loads with a smart-phone App. Get it now for $179.49 on Amazon, a great deal.
Everyone needs a borescope to check barrel fouling. Teslong makes very good borescopes. Get the Basic Model for $55.99 or get the Rigid Model for $99.99 with a metal shaft. Both work well.
Berger bullets are hard to find but we found these 7mm 184gr Hybrid bullets in stock and ready to ship. Grab them now before someone else does.
Simple targets are hard to beat at the range. We love these Champion Sight-In Targets for only $3. Grab a bunch and go have some fun.
This is a great deal — Get a 9mm Smith & Wesson SD9VE pistol with built-in Crimson Trace Laser and extra night sights for just $389.99.
These 10-power Vortex Diamondback Binoculars are rubber-armored and 100% weatherproof with O-Ring seals. Get these for just $137.99, a 40% savings off the regular $229.99 price.
If you want to upgrade your AR15 rifle, consider grabbing a RISE AR-15 Trigger. This trigger has a clean break with a short reset and comes with anti-walk pins for installation.
With this Frankford Universal Seating Die you can load NINE different bullet diameters: .224, .243, .257, .264, .277, .284, .308, .325, .338. Now just $62.24 on Amazon this kit includes micrometer stem, 9 bullet alignment sleeves, 3 VLD bullet seating stems, and molded storage case.
This dual-mode rifle case for hunters and tactical shooters boasts comfortable shoulder straps, plus large external pockets. This case is offered in green or black in 28″, 36″, 42″, and 51″ sizes. The 36″ model starts at $65.25 on Amazon.
Seat primers easily and reliably with the RCBS hand primer tool. The tray holds 100 primers and allows good feel of seating depth. The universal mount fits all common rim sizes.
Do you shoot an M1 Garand or 1903 Springfield? Here’s a great deal on genuine mil-spec .30-06 SPRG ammo from the CMP. Get 400 rounds of 150gr .30-06 M2 Ball ammo for just $392.00. This comes in original ammo can with 20rd boxes.
Sometimes you just need a simple, inexpensive scope for your hunting rifle. The Simmons 2.5-10x40mm Aetec is great for the price and is even illuminated for those dusk and dawn shots.
Match target bullets are still hard to find but we saw these Hornady 6.5 A-Tips and the price is great. These are top level bullets so don’t hesitate to grab some for your next match.
Here’s an excellent package deal. Get a S&W 9mm M&P Shield M2.0 pistol plus range bag, cleaning kit, AND a nice folding knife — all for just $374.99 — a $53 savings.
Protect your ears while hearing those around you with these Walker Electronic Muffs. They feature comfortable cups and 27db NRR for your protection.
You have the equipment but do you have the skills to shoot in the wind? Grab The Wind Book and you’ll get tips and tricks from wind experts so you can dominate your next match.
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The 6.5 Creedmoor is now one of the most popular cartridges chambered in factory rifles. It found favor among hunters and PRS competitors, but then its little brother the 6mm Creedmoor became widely adopted because the 6mm version delivered less recoil, equivalent or better ballistics, and lower bullet cost.
There’s another Creedmoor cousin, the 22 Creedmoor, basically a 6mm Creedmoor necked down to .224 caliber. While this certainly can be used for PRS and tactical competition, the 22 Creedmoor seems to be ideally suited as a high velocity varmint round — something to replace the 22-250. You get 22-250 class velocities with a more modern cartridge design, and high-quality brass.
LEARN MORE about the 22 Creedmoor
There is an excellent write-up in the GunsAmerica Digest about the 22 Creedmoor cartridge. Reviewer Jeff Cramblit built a 22 Creedmoor rifle and tested it with a variety of bullet weights. He concluded it worked best as a varminter, but could also do PRS duty, provided it is loaded under the 3200 fps velocity limit common in PRS matches. CLICK HERE to read full GunsAmerica 22 Creedmoor test report.
Since there is not yet a SAAMI spec for the 22 Creedmoor, the cartridge is officially still a wildcat. However some ammo-makers have produced 22 Creedmoor loaded ammo: Copper Creek, Gunwerks, and Spark Munitions. Copper Creek has produced the most 22 Creedmoor loaded ammo varieties, with 18 different bullet options from 68 grains to 95 grains, including two lead-free bullet types. However, most everything is “out of stock” right now. Copper Creek also offers load development packs with either Peterson or Hornady brass. Here are five Cooper Creek options with Sierra and Berger bullets:
In addition, multiple companies have offered 22 Creedmoor cartridge brass: Alpha Munitions, Atlas ADG, Hornady, and Peterson Cartridge. The Peterson 22 Creedmoor brass is excellent.
Of course you can neck down high-quality Lapua 6mm Creedmoor brass. Lapua brass has outstanding consistency and durability. Choose from large primer or small primer types. Necking down is a relatively easy one-step operation with a neck-sizing or full-length sizing die. You’re just stepping down to .224 from .243 — not that big of a jump.
22 Creedmoor Brass from Peterson Cartridge
According to Derek Peterson, President of Peterson Cartridge, “We decided to build the tooling to make our .22 Creedmoor brass in response to the uptick in long-distance predator and varmint hunting. Plus the round is just straight-up fun to shoot. It is a low-recoil, flat shooting, wind-bucking round [that is] deadly accurate up to 800 yards.”
“When we designed the tooling for the .22 Creedmoor we set out to make casings with improved features”, Peterson added. “And we were successful. We increased the head hardness to tolerate higher pressures. And we increased our internal volume slightly to work better with the slow-burning powders [such as Reloder 26 or H1000].”
22 Creedmoor for Varmints — Video from the Varmint Fields of Eastern Oregon
Bullet Choices for 22 Creedmoor
If you have an appropriate twist-rate barrel, you can load the 22 Creedmoor with heavy 85-95 grain bullets. However, we think that, for varminting, the cartridge is better suited for lighter 65-80 grain bullets. This yields high velocities that provide explosive impacts on small varmints.
This GunsAmerica photo shows, L to R, 90gr Sierra MK, Hornady 88gr, 80gr, and 75gr .224 caliber bullets.
What is the Best Role for the 22 Creedmoor?
GunsAmerica tester Jeff Cramblit favors the 22 Creedmoor as a varmint round: “The performance of the 22 Creedmoor with 75-80 grain bullets makes it an outstanding varmint cartridge. I’ve seen claims of 80 grain Bergers at 3500 fps out of 26″ barrels, which would be devastating on any varmint. Loaded ammunition is available with bullets in the 70-75 range leaving 24” barrels at velocities around 3400+ fps, a bit more conservative than personal hand-loading, but still making it a very flat shooting, low recoiling round delivering impressive results.”
Jeff says the 22 Creedmoor will also work for PRS with heavier bullets: “I built the 22 CM to be a dual-purpose gun, or actually a 3-purpose gun. The first was for the coyotes and varmints previously mentioned. The second was for shooting PRS (Precision Rifle Series) style matches on occasion, and the third was for hunting deer-sized game. As with any multi-purpose tool there tends to be compromises.”
22 Creedmoor Cartridge Dimensions (No SAAMI Spec Yet)
More Efficient Alternatives — the 22 BR and 22 BRA
If you already have a 6mmBR rifle, and you want a higher velocity cartridge for varmint shooting, you may want to consider just necking down your brass. We’ve shot the 22 BR in the varmint fields and a steel match. This cartridge offers excellent accuracy, and is very flat shooting. We recommend getting a fairly fast-twist barrel so you can shoot the longer, high-BC bullets if you want to use your 22 BR in local matches. You’ll find that shorter 40gr to 66gr varmint bullets shoot great even in the faster-twist barrels.
For more information on the 22 BR for varminting and target shooting, with recommended loads for 40gr to 90gr bullets, read our Accurate Shooter 22 BR Cartridge Guide.
If you want more velocity than a 22 BR offers, you can have your barrel chambered for the 22 BRA (BR Ackley). With its 40-degree shoulder, the 22 BRA offers a few more grains capacity, so you can get more FPS with all classes of bullets. Fire-forming is easy — just use a normal 22 BR load with good bullets and shoot. We’ve fire-formed a 22 BRA in a varmint match and it showed excellent accuracy — there’s no need to waste bullets fire-forming. Go ahead and fire-form during a fun match.
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Is factory 6.5 Creedmoor ammunition good enough to win a PRS or NRL competition? The answer is a resounding “YES” if we’re talking about Berger ammunition. Produced with Berger match bullets and premium Lapua brass, this Berger 6.5 Creedmoor ammunition demonstrated excellent accuracy, impressive velocity, and very good ES/SD numbers. When tested at 1000 yards with an MPA-stocked PRS rig with Rem 700 action, this ammo showed just half-MOA of vertical, and produced a group that would have been a 50-1X in F-Class competition. That’s quite impressive for a PRS rig.
This ammo test was performed by our friend Erik Cortina from Texas. The reigning SW Nationals F-Open champion, Erik is a top F-Class competitor who also shoots tactical matches (for fun and glory). A couple seasons back, Erik built a new 6.5 Creedmoor with a Remington 700 action. Though this rifle sports a top-shelf MPA chassis and premium Kahles scope, Erik calls this his “budget build” because it has a plain Rem 700 factory action rather than the elite Borden actions he normally runs. Erik’s actions of choice are the Borden Mountaineer for PRS and Borden BRM-XD for F-Class.
Erik posted: “Shot my budget 6.5 Creedmoor … with Berger Bullets factory ammo. I shot five rounds over the chrono to get speed. I used BC info from the box and it all lined up properly. I adjusted my ECTuner to tune load and it took just 15 shots to get it shooting well. It’s simple with good components.”
This Berger factory ammo features Berger 130gr Hybrid OTM Tactical bullets. The Lapua 6.5 Creedmoor cases have a large rifle primer. You can see this ammo displays good velocity with Extreme Spread and Standard Deviation rivaling good hand-loads.
Cortina says the very accurate Brux barrel and razor-sharp 6-24x56mm Kahles scope help achieve this kind of outstanding performance at 1000 yards. Here are the key components for Erik’s latest PRS rig:
Barrel Tuner by Erik Cortina — Fits Behind Muzzle Brake
This rifle features a barrel tuner designed and crafted by Erik Cortina. You can the EC Barrel Tuner alone, or, as you can see, the EC Tuner can be fitted BEHIND a muzzle brake. Erik tells us: “The EC Tuner allowed me to tune the barrel to my ammo rather than tuning the ammo for barrel as is done when reloading. With the tuner, there is no need to try different brands of ammo as they can all be tuned to shoot as good as possible in my rifle.”
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Berger’s James Fox won the 2023 California Regional High Power Service Rifle Championship shooting Berger factory ammunition and 80.5gr bullets. Fox had a Grand Aggregate score of 1282-48X. Notably, at the closer ranges, Fox shot Berger factory-loaded .223 Rem 77gr OTM ammunition in his AR-platform rifle. For the 600-yard targets, Fox shot ammo loaded with Berger 80.5gr Fullbore bullets. Fox noted: “The Berger 80.5 Grain Fullbore bullets are truly the ‘easy button’ for Service Rifle, because they seem to just shoot in any barrel I have[.]”
The 2023 California Regional Service Rifle High Power Championship was hosted by the Coalinga (CA) Rifle Club on April 1st and 2nd, 2023. With two days of shooting, Fox finished in first on Day One with a score of 792-33X, and first again on Day Two with a 490-15X. In High Power Service Rifle, competitors test their skill in four stages: 200yd Slow-fire Standing, 200yd Rapid-fire Sitting (or kneeling), 300yd Rapid Prone, and 600yd Slow-fire Prone.
With the vast amount of rain California has received in 2023, the Coalinga Range was lush and green. The shooting conditions were also quite good at this April match, with minimal mirage, and mostly consistent winds, making for fairly “easy” shooting and high scores. Competitor Greg Brown noted: “The weather conditions were very pleasant and the winds mild this year. This wind was not a factor for off-hand which helped everyone to generally good scores at the 200-yard line. The winds were somewhat swirly for 300-yard Rapid Fire stage both days and cost some points lost. Conditions for the 600-yard stage looked benign, but tricky enough to prevent any perfect scores, but several 199s were fired on Saturday.”
Archive photo from a past year. The Coalinga Range was far more green and lush in April 2023.
Berger Ammo and Bullets Used by James Fox
“The California Regional Service Rifle Championship was the start to my 2023 shooting season. It was 23 years since the last time I shot at the Coalinga Rifle Club, which both times have resulted in very favorable outcomes for me”, stated Fox. “The first time in 2000 I earned my last Leg Points to become a CMP Distinguished Rifleman, and this year winning the Championship for the first time. During the two-day Aggregate match, I found some early success in the Rapid-fire Sitting stage at 200 yards, where I shot a sub 1-MOA group using Berger’s .223 Remington 77gr OTM ammunition. And later in the day at 600 yards, I fired Berger 80.5gr Fullbore bullets as they held great elevation allowing me to keep rounds in the middle, despite the wind conditions. The Berger 80.5gr Fullbore bullets are truly the ‘easy button’ for Service Rifle, because they seem to just shoot in any barrel I have, with a wide range of powder charges, Vihtavuori N140 seemingly being the best.” Fox will compete next month at the CMP Eastern Games.
Abundant Grass After Much Rain Attracted Cattle to the Range
Greg Brown noted that there were some special challenges at this match — grazing cattle: “The Coalinga Range was at its most scenic this early April time with deep green hills and the grazing yearling steers getting fatter by the hour. Several times the cattle grazed too lose and the shooters turned cowboys had to wrangle them safely off the range.”
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Berger Twist-Rate Stability Calculator On the Berger Bullets website you’ll find a handy Twist-Rate Stability Calculator that predicts your gyroscopic stability factor (SG) based on mulitiple variables: velocity, bullet length, bullet weight, barrel twist rate, ambient temperature, and altitude. This cool tool tells you if your chosen bullet will really stabilize in your barrel.
How to Use Berger’s Twist Rate Calculator
Using the Twist Rate Calculator is simple. Just enter the bullet DIAMETER (e.g. .264), bullet WEIGHT (in grains), and bullet overall LENGTH (in inches). On its website, Berger conveniently provides this info for all its bullet types. For other brands, we suggest you weigh three examples of your chosen bullet, and also measure the length on three samples. Then use the average weight and length of the three. To calculate bullet stability, simply enter your bullet data (along with observed Muzzle Velocity, outside Temperature, and Altitude) and click “Calculate SG”. Try different twist rate numbers (and recalculate) until you get an SG value of 1.4 (or higher).
Gyroscopic Stability (SG) and Twist Rate
Berger’s Twist Rate Calculator provides a predicted stability value called “SG” (for “Gyroscopic Stability”). This indicates the Gyroscopic Stability applied to the bullet by spin. This number is derived from the basic equation: SG = (rigidity of the spinning mass)/(overturning aerodynamic torque).
If you have an SG under 1.0, your bullet is predicted not to stabilize. If you have between 1.0 and 1.1 SG, your bullet may or may not stabilize. If you have an SG greater than 1.1, your bullet should stabilize under optimal conditions, but stabilization might not be adequate when temperature, altitude, or other variables are less-than-optimal. That’s why Berger normally recommends at least 1.5 SG to get out of the “Marginal Stability” zone.
In his book Applied Ballistics For Long-Range Shooting (3rd Ed.), Bryan Litz (Berger Ballistician) recommends at least a 1.4 SG rating when selecting a barrel twist for a particular bullet. This gives you a safety margin for shooting under various conditions, such as higher or lower altitudes or temperatures.
Story idea from EdLongrange. We welcome reader submissions.
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The 2023 F-Class World Championships will commence soon in South Africa. The 2023 F-Class World Championships are being held at the General Christiaan de Wet Shooting Range in Blomfontein, South Africa from March 26th through April 1st. Competitors from around the globe will compete in both F-Class Target Rifle (F-TR) and F-Open divisions battling for the prestigious title of World Champion.
Team USA will be competing in both divisions for a full week. The team includes past American champions and Southwest Nationals winners. Berger, manufacturer of high quality bullets and ammunition for competitive long-range shooters and sportsman, is a leading sponsor of the 2023 United States F-Class Team competing at the 2023 F-Class World Championships in South Africa.
The U.S. F-Open and F-TR teams are comprised of over 60 members coming from 25 different states. The team members have spent over five years preparing for this major event. Lead by Captains Dan Bramley and Phil Kelley, the teams are sure to make an impact. Three members of Team Berger — James Crofts, Trudie Fay, and Matt Schwartzkopf — are serving as coaches for US F-TR team. Team Lapua’s own Erik Cortina will be competing as part of the F-Open team.
“We are honored to have the opportunity to support United States F-Class Teams on their quest to be crowned international champions”, commented Geoff Esterline, Director of Marketing at Berger Bullets.
Team USA will also be supported by Lapua, maker of top brass and bullets. “We’re proud to support the United State F-Class Teams as they compete in South Africa at the World Championships”, commented Adam Braverman, V.P. of Sales & Marketing at Capstone. “We’ve watched the team over the last five years come together, practice, make it through delays due to COVID and still remain strong.”
USA F-TR Team Will Use Berger 200.2X Hybrid Target .30-Cal Bullets
F-Class Target Rifle (F-TR) category has strict requirements for a “ready-to-go” rifle weighing no more than 18 pounds. Chambers are required to be unmodified and use a standard .308 Win/7.62 NATO or .223 Rem/5.56 NATO cartridge. For competition, the U.S. F-TR team utilizes Berger’s .30 caliber 200.20X Hybrid Target, and 215 grain Hybrid Target bullets.
USA F-Open Team Will Use Berger 7mm 184gr and 180gr Hybrid Target Bullets
The F-Open category has requirements of a rifle weighing no more than 22 pounds and chambered in any caliber .35 and under. Rifles are fired in the prone position from the shoulder with an adjustable front rest and rear sandbag. Berger’s 7mm 184 grain Hybrid Target bullet is a favorite among F-Open competitors and is the official bullet of the U.S. F-Class F-Open team. The team also competes with Berger’s 7mm 180 Grain Hybrid Target bullet.
This video shows a match at the Genl De Wet Range in South Africa a decade ago:
About Berger and Lapua
Berger manufactures precision projectiles and match-grade ammunition for Target, Hunting, and Tactical applications in Mesa, AZ. For 100 years, Lapua has been producing the highest-quality cartridges and components for civilian and professional use. Berger and Lapua are both part of the Capstone Precision Group, exclusive U.S. distributor for Berger, Lapua, Vihtavuori and SK-Rimfire products. For more information, visit Bergerbullets.com and Lapua.com.
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Berger bullets are in high demand. It’s pretty rare to find a large inventory of Berger bullets, and even more rare to find popular Berger bullets at a significant discount. But count your blessings — right now at Precision Reloading, a wide selection of Berger bullets are on sale, with savings up to 20%. There are currently 58 Berger bullet offerings ON Sale now. Check out some of the samples below. CLICK HERE to view ALL the Berger bullets on sale. The available calibers include: .224, .243 (6mm), .257, .264 (6.5mm), .270, .284 (7mm), .308, .338, and .375.
But don’t delay — you need to act quickly. This Berger Bullets Sale concludes at 11:59 PM central time on Thursday, March 16, 2023. So you’ve got three and a half more days to grab the deals. Here are some of the most notable Berger bullet offerings, but there are dozens more deals!
NOTE: This is a PARTIAL LIST! 49 Other bullet offerings (50, 500, and 1000 ct) are on sale.
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The 6mmBR Norma cartridge has spawned many great variants in multiple calibers: 6mm Dasher, 6BRA, 22 BR, 22 Dasher, 30 BR and others. This article is about a handsome 22 BR Rem-action varmint rig.
Richard Franklin (who operated Richard’s Custom Rifles prior to his retirement), has built scores of varmint rifles, in many different calibers. One of Richard’s all-time favorite varmint rifles is a 1:14″-twist, 22 BR built on his Model 11 stock in laminated Black Walnut and fiddleback maple. Richard says the rifle is versatile and deadly accurate out to 400 yards. Richard uses a Leupold 8.5-25x50mm LRT with varmint reticle.
Richard’s 22 BR Varmint Rifle with Lilja Barrel
Richard tells us: “[Shown above] is my light walking varminter. It’s built on a blue-printed Stainless Steel Remington 700 short action and chambered as a no-turn 22 BR for Lapua brass. The bolt handle is a Dave Kiff replacement and I’ve fitted a Jewel BR trigger with bottom safety. The barrel is a Lilja, 1:14″ #6 contour with a muzzle diameter of .750″. I shoot the 40gr V-Max bullets in the rifle at 4000 FPS. It’s tough on hogs if you don’t try them too far. 400 yards is about the max with it.
Accuracy is outstanding and with Roy, Mike, my grandson and myself shooting this rifle I don’t believe it has missed more than three hogs out of over 100 we shot at one summer. This rifle is carried in a ceiling rack in the truck where it’s handy and is used by the first person that grabs it when a hog is sighted if we are moving between setups. The Varmint reticle on the Leupold (shown below) is nice for quick hold-overs as you change distances.”
At right is a another Franklin Model 11 stock in Birdseye maple. That photo shows the details of the thumbhole stock.
Editor’s Note: We have shot a 1:8″-twist 22 BR in varmint matches and it was very accurate with 80gr bullets. It actually shot flatter out to 500 yards than our 6mmBR running 105-grainers. If we were to build a new long-range, bolt-action varmint rifle it would probably be a 22 BRA, essentially a 22 BR with 40° shoulder. That gives you a very stable cartridge with a bit more capacity. The 22 BRA retains a longer neck compare to the 22 Dasher, which is also an excellent cartridge — versatile and accurate.
22 BR Rivals 22-250 Performance
With bullets in the 40gr to 60gr weight range, the 22 BR gives up very little in velocity to a 22-250, despite burning quite a bit less powder (30-32 grains for the 22 BR vs. 35-38 grains for the 22-250). With a match-quality chamber, the 22 BR will probably have an edge in accuracy over a 22-250, and you should experience longer barrel life. Here are some recommended 22 BR loads for 40-60gr bullets:
Over the past 12 months, this article was one of the TOP 20 most-read Daily Bulletin features. We’re reprising it today for those who may have missed it the first time. The above diagram comes from a TiborasurasRex YouTube Video comparing G1 and G7 BC models. CLICK HERE to watch the video.
The better, up-to-date ballistics programs let you select either G1 or G7 Ballistic Coefficient (BC) values when calculating a trajectory. The ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight. You’ve probably seen that G7 values are numerically lower than G1 values for the same bullet (typically). But that doesn’t mean you should select a G1 value simply because it is higher.
Some readers are not quite sure about the difference between G1 and G7 models. One forum member wrote us: “I went on the JBM Ballistics website to use the web-based Trajectory Calculator and when I got to the part that gives you a choice to choose between G1 and G7 BC, I was stumped. What determines how, or which one to use?”
The simple answer is the G1 value normally works better for shorter flat-based bullets, while the G7 value should work better for longer, boat-tailed bullets.
G1 vs. G7 Ballistic Coefficients — Which Is Right for You?
G1 and G7 refer both refer to aerodynamic drag models based on particular “standard projectile” shapes. The G1 shape looks like a flat-based bullet. The G7 shape is quite different, and better approximates the geometry of a modern long-range bullet. So, when choosing your drag model, G1 is preferable for flat-based bullets, while G7 is ordinarily a “better fit” for longer, boat-tailed bullets.
Drag Models — G7 is better than G1 for Long-Range Bullets
Many ballistics programs still offer only the default G1 drag model. Bryan Litz, author of Applied Ballistics for Long Range Shooting, believes the G7 standard is preferrable for long-range, low-drag bullets: “Part of the reason there is so much ‘slop’ in advertised BCs is because they’re referenced to the G1 standard which is very speed sensitive. The G7 standard is more appropriate for long range bullets. Here’s the results of my testing on two low-drag, long-range boat-tail bullets, so you can see how the G1 and G7 Ballistic coefficients compare:
G1 BCs, averaged between 1500 fps and 3000 fps:
Berger 180 VLD: 0.659 lb/in²
JLK 180: 0.645 lb/in²
The reason the BC for the JLK is less is mostly because the meplat was significantly larger on the particular lot that I tested (0.075″ vs 0.059″; see attached drawings).
For bullets like these, it’s much better to use the G7 standard. The following BCs are referenced to the G7 standard, and are constant for all speeds.
Many modern ballistics programs, including the free online JBM Ballistics Program, are able to use BCs referenced to G7 standards. When available, these BCs are more appropriate for long range bullets, according to Bryan.
[Editor’s NOTE: BCs are normally reported simply as an 0.XXX number. The lb/in² tag applies to all BCs, but is commonly left off for simplicity.]
This article is copyright 2023 AccurateShooter.com. No 3rd Party republication of this article is allowed without advance approval and payment of licensing fees.
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The 2023 Western Hunting and Conservation EXPO opens today at the Salt Palace Convention Center in Salt Lake City, Utah. The Western Hunting and Conservation Expo is the largest hunting convention open to the public in the Western USA. The EXPO features daily seminars, waterfowl and elk calling championships, auctions, drawings and more. Exhibit halls open 10:00 AM to 7:00 PM, Thursday through Saturday and 10:00 AM to 4:00 PM on Sunday. A partnership between the Mule Deer Foundation, Sportsmen for Fish and Wildlife, and Utah Office of Tourism. With over 400 hunting and outdoor business vendors, this year’s event should attract over 55,000 attendees.
CLICK HERE to register for the EXPO. Various packages are offered. There is a basic 4-day Hall Pass, and other deluxe packages including banquets and entertainment.
New Elite Hunter Bullets from Berger Berger Bullets will attend the 2023 Western Hunting EXPO this year in Utah. Berger’s hunting bullets — VLD Hunting, Elite Hunter, and Classic Hunter –are designed for controlled expansion and extreme hydrostatic shock at both short- and long-range distances. These bullets are available for handloaders, and these bullet options are also offered used in quality factory ammo.
New for 2023, Berger has expanded its successful Elite Hunter ammunition with the following offerings: 6mm Creedmoor 108 Grain Elite Hunter, 6.5 Creedmoor 140 Grain Elite Hunter, 6.5 PRC 140 Grain Elite Hunter, and 300 PRC 245 Grain Elite Hunter.
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Here’s a late-breaking deal. If you need high-BC 6mm match bullets for benchrest, F-Class, PRS/NRL, or silhouette matches, head over to Precision Reloading. While Berger bullets have been in very high demand lately, Precision Reloading has a large inventory of Berger 6mm match bullets IN STOCK now. Chose from 90gr, 95gr, 105gr, 108gr, and 115gr 6mm bullets. PLUS there are Coupon CODES good today to save $10 Off $100, $25 Off $250, and $50 Off $500. But you better act soon, these bullets may sell out quickly, and those Coupon CODES expire tonight, 10/31/2022 at 11:59 PM CST.
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If you already have a 6mmBR rifle, and you want a higher velocity cartridge for varmint shooting, you may want to consider just necking down your brass. We’ve shot the 22 BR in the varmint fields and a steel match. This cartridge offers excellent accuracy, and is very flat shooting. We recommend getting a fairly fast-twist barrel so you can shoot the longer, high-BC bullets if you want to use your 22 BR in local matches. You’ll find that shorter 40gr to 66gr varmint bullets shoot great even in the faster-twist barrels.
Cortina says the very accurate Brux barrel and razor-sharp 6-24x56mm Kahles scope help achieve this kind of outstanding performance at 1000 yards. Here are the key components for Erik’s latest PRS rig:
The 6mmBR Norma cartridge has spawned many great variants in multiple calibers: 6mm Dasher, 6BRA, 22 BR, 22 Dasher, 30 BR and others. This article is about a handsome 22 BR Rem-action varmint rig.
Accuracy is outstanding and with Roy, Mike, my grandson and myself shooting this rifle I don’t believe it has missed more than three hogs out of over 100 we shot at one summer. This rifle is carried in a ceiling rack in the truck where it’s handy and is used by the first person that grabs it when a hog is sighted if we are moving between setups. The Varmint reticle on the Leupold (shown below) is nice for quick hold-overs as you change distances.”
The better, up-to-date ballistics programs let you select either G1 or G7 Ballistic Coefficient (BC) values when calculating a trajectory. The ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight. You’ve probably seen that G7 values are numerically lower than G1 values for the same bullet (typically). But that doesn’t mean you should select a G1 value simply because it is higher.
Drag Models — G7 is better than G1 for Long-Range Bullets
