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September 14th, 2024

Saturday Movies: Hunting Optics — Scopes, LRFs, Spotters, Binocs

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Hunting season is coming soon. For hunters that means many hours may be spent searching for animals through spotting scopes and binoculars — “glassing” for game. And when the hunter does find a good buck or doe, he’ll need to know the animal’s precise distance, so that demands a good laser rangefinder. Being carried in the field, the scopes on hunting rifles need to be tough and durable, and every hunting scope should have excellent low-light performance. And when the hunter finally takes his shot, his scope better be properly zeroed. Today’s Saturday showcase spotlights Hunting Optics. We offer eight great videos that help you select the right riflescope, spotting scope, rangefinder, and binoculars for your next hunt.

Showcase of Seven Popular Hunting Scopes

This video showcases seven (7) popular hunting scopes currently available in 2024. This video consists mostly of manufacturer-created marketing content with some independent reviews. Consider this video a place to start when shopping for a new hunting optic. You’ll want to check independent reviews when you select a particular model. The seven riflescopes featured in the video are: Hawke Sidewinder 30 FFP, ZEISS Conquest V4 Precision Scope, Vortex Strike Eagle, Vortex Viper PST Gen II FFP, Leupold VX-5HD, SIG Sauer Whiskey3, and Vortex Diamondback Tactical FFP.

Optics Selections for Mountain Hunts

Here’s a good video by an avid hunter who treks in remote, mountainous zones. The host has learned what works… and what’s worth the weight to carry: “I’ve found that the combination of 10×42 binoculars and a 27–60x80mm spotting scope is the sweet spot for mountain hunting. This pairing balances weight with reach, allowing me to keep moving but also reach out and see well-hidden animals. In some cases, I will make use of an 18×56 binocular, but this is reserved for non-backpack hunts. With 25 years of mountain hunting experience, I can whole-heartedly recommend my preferred binocular pair as a fantastic and versatile set-up for northern mountain hunts at the very least.”

Ultimate Spotter Test — 19 Spotting Scopes Reviewed

The producers of this remarkable 19-product spotting scope comparison state: “If you are looking at choosing the best spotting scope for hunting… you are in the right place! We tested these 19 spotting scopes to find the best compact spotting scope, best 65mm spotting scope, and best 85mm spotting scope out there. We also wanted to find the best values on the market, and I think we definitely did that. While we certainly couldn’t test them ALL, we were able to put together this incredible lineup of some of the best spotting scopes out there to help you find what is going to work for your specific needs.”

First Focal Plane vs. Second Focal Plane Scopes

For the last century, Second Focal Plane (SFP) scopes have been most common on hunting rifles. Now there are an increasing number of First Focal Plane (FFP) optics favored by hunters. The main reason is that the reticle mark values (in Mils or MOA) are constant relative to the target size at all magnification levels. That is handy for hold-offs and hold-overs. On the other hand, a SFP scope maintains a constant reticle size and line thickness at all zoom values. For most hunting shots, taken inside 300 yards, that really should be fine. Many hunters feel they can spot their prey more easily without a busy reticle that obscures small details at higher magnification. This video explains the pros and cons of both reticle types. The final decision is up to you — much will depend on the terrain you hunt and the distances you shoot.

The Complete Optics Selection for For Deer Hunting

In this video, Vortex optics techs explain the optics package deer hunters will want to take into the field. Along with a good medium-power zoom riflescope, you’ll want binoculars and (probably) a spotting scope. You’ll also want a Laser Rangefinder (LRF) or laser-equipped binoculars. As the team points out, the LRF is not just to range your prey right before you take a shot. A top-quality LRF can range a reflective object as far as 1500 yards away. That helps you decide whether you want to hike a mile to reach that buck you see way out on the next ridge.

MOA vs. MIL — What You Need to Know

These days, scope manufacturers offer a wide selection of both MIL (Milliradian) and MOA (Minute-of-Angle) based optics. We do think that MOA is still predominant in the lighter-weight, lower-cost (sub-$500) scopes marketed for hunters. There are pros and cons for both angular measurement systems. One MIL is 3.6″ at 100 yards, while one MOA is 1.047″ at 100 yards. If you grew up thinking in inches, a 1/4-MOA click-value hunting scope might work best. If you shoot PRS or have other MIL scopes you may prefer a MIL-value optic for your hunting rifle. Both choices will do the job.

Comparison of Eight Laser Rangefinders

The Backfire team purchased eight rangefinders and tested them in the field. Most of the products are under $500. This is a good review if you are looking for a compact LRF at a moderate price. Looking at performance for the price, for the hunting market, the reviewers favored the Leupold RX-1600 and the waterproof Vortex Ranger 1800. COMMENTARY: If you can afford it, we recommend that serious hunters consider top-end laser rangefinder-equipped binoculars such as the ZEISS Victory RF and Leica Geovid.

How to Zero Your Hunting Rifle Efficiently

Last but not least, here’s a great video from Vortex that shows you how to quickly and efficiently sight-in and zero your hunting rifle before heading out into the field. This video explains a simple procedure that lets you get a solid zero in just three shots. Of course you probably want to fire a few more rounds to confirm your zero before you head off to your hunting grounds, but this will let you get on-target with a minimum amount of time and ammo expended. This helpful video has over 3 million views on YouTube!

3-Shot Zero

Fouling Shots and Cold Bore Condition
If you recently cleaned your rifle, you may want to fire two or three fouling shots before you start this procedure. But keep in mind that you want to duplicate the typical cold bore conditions that you’ll experience during the hunt. If you set your zero after three fouling shots, then make sure the bore is in a similar condition when you actually go out hunting.

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September 9th, 2024

FREE NRA Experienced Hunter Education Courses Online

Experienced Hunter education course NRA

Hunting season is starting soon in most areas of the country. Here’s a way you can improve your hunting skills/knowledge. The NRA is offering a FREE online Experienced Hunter Education Course for those preparing to take advantage of the 2024 hunting season.

“Our Experienced Hunter Education Course provides those who might have taken a season or two off a convenient way to sharpen their skills before heading back into the field,” said Peter Churchbourne, director of NRA’s Hunters Leadership Forum.

NRA’s free 2-hour course is a firearm and hunting safety-training refresher in a convenient and engaging platform available through desktop, tablet, or smartphone. The course is available to everyone at www.NRAEHE.org. NOTE: The course is NOT a substitute for state-mandated hunter safety requirements and does not offer any certifications.

Experiencd Hunter education course NRA

The NRA’s NRA Experienced Hunter Education Course, is an online training program designed to help hunters brush up their skills. Free to all, this comprehensive hunting refresher course will help hunters become safer and more confident before heading out into the field. CLICK HERE for more information.

Experienced Hunter education course NRA

“If you’ve taken a break from the shooting sports or haven’t hunted in a season or two, our Experienced Hunter Education Course is the perfect refresher for firearms safety and safe hunting practices,” explained Elizabeth Bush, managing director of NRA Community Engagement. “Best of all, we’re offering this service completely free of charge.”

Course Description
This online training course is specifically designed for individuals who have not hunted in the past year or more and are looking for a safety refresher before they head back out in the field. In this course, hunters will have the opportunity to refresh their skills by taking a look at safe hunting practices and firearms safety. Once completed, you will be a safer hunter in the field.

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September 8th, 2024

Hunting Safety Checklist — Reminder Before Your Fall Hunt

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Elk Hunt with Horn Fork Guides, Ltd., in Colorado.

national hunting fishing day NSSF hunter deer elk gameSeptember 28, 2024 is National Hunting & Fishing Day. The annual celebration takes place on the the fourth Saturday of September every year. National, regional, state and local organizations will run thousands of “open house” hunting- and fishing-related events around the country. Events will include Fishing Derbys, Hunting Expos, Wing-shooting tournaments, and much more.

Hunting Safety Checklist
A good hunt begins with preparation. And during the hunt, safety is a key priority. To help hunters, the National Shooting Sports Foundation (NSSF) has created a Safety Checklist for hunters. This Hunting Safety Checklist, produced as part of the NSSF’s “Hunt S.A.F.E.” campaign, helps hunters follow good, safe practices in the field and at home.


Download NSSF Hunting Safety Checklist »

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hunting safety day checklist
Elk photo courtesy Colorado Parks and Wildlife.

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September 7th, 2024

2024 Hunting Gear Giveaway — Win Pistol, Optics, Packs & More

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Are you feeling lucky? Here is one of the better hunting season prize packages we’ve seen in recent years. It’s easy enough to enter to win an impressive collection of products including a SIG Sauer P320 pistol, multiple Vortex optics products, pack system, boots and much more. There is no purchase necessary for a chance to win.

Alien Gear Holsters, American manufacturer of holsters and firearms accessories, has pulled together some of the top brands in the industry to create an impressive Hunting Season Giveaway for 2022. There’s a massive collection of cool products for the 2022 Hunting Season Prize Package. Shawn Hostetter, CEO of Alien Gear Holsters, states: “All together this prize package is worth several thousand dollars and would make an incredible start to hunting season, or a fantastic gift for the hunter in the family.”

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Products Included in the impressive Prize Package:

- SIG Sauer P320 XTen 10mm Pistol
– VORTEX Optics: Diamondback HD 20-60×85 Spotting Scope, Diamondback HD 10×50 Binoculars and Defender-ST Red Dot sight
– IA3K Pack System from Initial Ascent
– Select Hunting/trekking Boot from Crispi
– MOB GameBags and Carbon X Tracking Poles from Argali Outdoors
– Zeus Air and First Aid Plus Kit from Uncharted Supply Co.
– One-year subscription to an OnX Elite Membership
– 30mm Medium Rifle Rings and goodies from Seekins Precision
– New Select Holster from Alien Gear Holsters

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It’s easy to enter by filling out Online Entry Form. Eligible participants have until September 30, 2024, to enter for a random chance to win this ultimate hunting package.

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September 6th, 2024

Prepare for Hunting Season with Free, Printable Game Targets

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Hunting season is coming soon. It’s time to sight-in those deer rifles, check the optics, and make sure you’re ready to go. We know some hunters might enjoy shooting game profile targets when at the range for the sight-in process. To that end, here are six animal profile targets from Gun.Deals. Right-click any target to download the printable PDF file, designed to print to standard 8.5″ x 11″ paper. All these targets include entry boxes for Shooter Name, Score, Range (distance), and Date.

Deer Targets with Center Hit Zones
Gun.Deals offers two different deer targets, both free to download. We prefer the standing buck with target ring in center mass (left below). Hit the red “10” for maximum points. You can also use this target for rimfire fun practice. NOTE: The ideal shot location for a deer or elk is in a different location, closer to the heart location in the lower, forward torso. However, these targets can be used for initial practice. CLICK HERE for specific anatomical targets for various game species.

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Bear Targets with Center Bulls
Few of us have actually encountered large bears in the wild. But if you do… it can be scary. Work on your bear recognition skills with these two targets, a standing bear, and a bear horizontal profile.

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Sight-In Target and Bullseye Target
Courtesy of Gun.Deals, we’ve also included a conventional bullseye and a sight-in target. You can augment that sight-in sheet with neon orange Birchwood-Casey Target Spots if you want multiple aim points. A target pack with 160 1.5″ Target Dots is just $3.33 at Amazon.

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August 29th, 2024

Free ZEISS Hunting App with Ballistics, GPS Tags, and Weather

Zeiss ios apple android hunting App mobile

iPhone/iPad Hunting App (iOS) | Android Hunting App (Google)

KEY FEATURES: Ballistics Solver, GPS Tagging, Weather Forecast, Field Notes with Photos

Hunters, here’s a great FREE mobile APP for both Apple and Android systems. The ZEISS Hunting App offers many practical functions: full-featured ballistics calculator, field notes with photo archive, compass function, GPS tagging for documentation of hunting experiences, and a detailed weather forecast service. The Hunting App is offered as a FREE download for Android and iOS (iPhone/iPad) mobile devices.

Three Minute Video Explains Zeiss Hunting App Features:

The Zeiss Hunting App integrates multiple useful features — ballistics solver, compass, GPS tagging, hunt history. The “Field Notes” function can record a wide variety of info — you can save photos, record your shots and hits, log animal sightings during the hunt, and even plot game locations on a map. Zeiss explains: “This allows users to optimally record events, the game population in the hunting territory, and their own hunting experiences.” Shots can be tagged via GPS through the shooter’s and the target’s position, and then displayed on a map. The Field Notes hunt diary shows all entries in chronological order.

Zeiss ios apple android hunting App mobile

Full-Featured Ballistics Solver
The integrated ballistic calculator allows hunters to easily customize the settings to suit their favorite cartridges. You can enter your own data, or choose bullet/cartridge info from a database containing over 7000 ammunition types from a variety of manufacturers. The ballistics solver can be programmed for for current weather conditions (temp/humidity), and the angle (inclination) of the shot.

Zeiss ios apple android hunting App mobile

Weather Functions
The weather tool offers a Five-Day Forecast, and you can choose multiple locations. In addition to the current location, users can also display the weather for their hunting areas of choice. The weather forecast includes temperature, precipitation, wind direction, wind speed, humidity, and air pressure. (Note: For precise ballistics solutions, you must input the ACTUAL conditions at your shooting location).

This video explains how to define a hunting zone and set GPS location tags on the map:

Hunt Log and Photos
The Field Notes function can do many things. You can log all your shots and hits, and you can plot game sightings during the hunt. Events can be augmented with photos and GPS data. With the Field Notes mapping function, you can even locate game populations in the hunting territory. A compass and automatic night mode round off the list of smart features.

Zeiss ios apple android hunting App mobile

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August 28th, 2024

2024 NRL Precision Hunter Challenge on Shooting USA TV Today

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Today’s Shooting USA broadcast features the 2024 NRL Precision Hunter Challenge held June 7-9, 2024 outside Price, Utah.

The NRL Precision Hunter Challenge features a multi-distance, walk-around shooting course similar in some ways to PRS/NRL, but limitations on weight and cost of equipment make this more affordable and more practical. This relatively new discipline is part of a series of very popular NRL Hunter events held around the nation. There were 24 NRL Hunter matches this year, culminating in the NRL Hunter Grand Slam held August 9-11 in Decorah, Iowa. CLICK HERE for NRL Hunter match information.

Shooting USA SHOW TIMES on Outdoor Channel:
The 2023 Hornady NRL Hunter Challenge is featured this week on Shooting USA television. This Shooting USA Episode airs Wednesday, August 28, 2024 at 9:00 PM Eastern and Pacific; 8:00 PM Central on the Outdoor Channel. If you miss the regular broadcast, you can stream the show online on Vimeo for $0.99 per episode.

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121 Shooters from all over the country competed in 23 challenging stages with both animal shapes and conventional square/diamond targets. The course of fire consisted of 160+ rounds with hiking between stages at the North Springs Shooting Complex. The Precision Hunter Challenge featured target distances from 200-850 yards, and angled shots between 0-10°. At the North Springs Shooting Complex, there were natural terrain obstacles and tree stands. Competitors had to navigate the terrain to establish their shooting positions — very much the opposite of a benchrest match.

This event is an opportunity to work on hunting situation shots, where hunters may expect natural terrain obstacles and thick cedars to navigate around and find shooting positions.

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“The NRL HUNTER Series is designed to help educate new and seasoned hunters about their skills, gear, and personal limitations. The Hornady Precision Hunter Challenge did just that!” said Travis Ishida, President of the NRL. “With a well-designed course of fire that was both challenging and fun, this match encompassed everything we are looking for…” he added. Along with Hornady, notable sponsors included Kestrel, Magnetospeed, ThunderBeast Arms, SIG Sauer, Leupold, Vortex, Nightforce, Savage, Seekins Precision and many other companies.

This video features highlights from the 2022 Hornady Precision Hunter Challenge:

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August 23rd, 2024

Howa Super Lite Hunting Rifles — Under 4.5 Pounds

Howa superlite super lite lightweight hunting rifle stocky's carbon stock varmint 6.5 creedmoor .308 win

Fall hunting season is coming soon. When you’re trekking many miles in the back-country on a hunt, rifle weight DOES matter. Many hunters want to keep their rifle weight as low as possible to reduce the overall load they must carry in the field. Howa now offers a series of Super Lite rifles that weigh under four and a half pounds (without scope, sling, or ammo). That’s impressive.

Howa claims that its Super Lite rifle is the “absolute lightest centerfire rifle on the market”. We can’t confirm that. But at a listed 4 pounds, 7 ounces (without optics), the carbon-fiber stock Super Lite model is very low in weight and mass (4.4375 pounds to be exact, without scope). And there is a Super Lite Short Barrel model (with 16.25″ barrel) that is just 4 pounds, 3 ounces (without scope). Either version is VERY light indeed — an important plus for hunters carrying their gear for long hours in the field.

Both standard and short-barrel versions of the Howa Super Lite rifle are currently available in .243 Win, 6.5 Creedmoor, 7mm-08 Rem, and .308 Winchester, four very popular hunting chamberings.

Howa superlite super lite lightweight hunting rifle stocky's carbon stock varmint 6.5 creedmoor .308 win
Photo shows Howa Super Lite Rifle with Kyptek Altitude Camo finish.

For 2024 the Howa Super Lite is offered with six carbon stock finishes, including three impressive camo types: Kryptek Obskura Transitional, Kryptek Altitude, and XK7 Kings Camo. Fitted with the strong but light Stocky’s Carbon Fiber stock, these Super Lite models feature a black webbing and soft touch for added texture and enhanced grip on the low-mass carbon stock. Howa also offers a walnut-stocked version of the Super Lite rifle. This weighs a bit more — 5 pounds, 9 ounces.

Howa Super Lite Rifle Features

Stock Options: Gray, Tan, Green, Kryptek Obskura Transitional Camo, Kryptek Altitude Camo, XK7 Kings Camo, and Walnut Wood (no wood for short barrel models)
Rifle Weight: Standard 4 lbs. 7 oz. | Short Bbl 4 lbs. 3 oz. | Walnut Stock, 5 lbs. 9 oz.
Chamberings: .243 Win, 6.5 Creedmoor, 7mm-08, .308 Win
Stock: Stocky’s Carbon Fiber Stock with Accublock patented Lug Bed
Standard Barrel: 20″ Blued barrel threaded (½”-28) and Suppressor Ready
Short Barrel: 16.25″ Blued
Trigger: 2-Stage Match Trigger with 3-position Safety
Optics Mounting: Included one-piece Picatinny Rail
Stock Feature: Limbsaver Butt Pad
Warranty: Lifetime Howa Warranty

Accuracy Claim: Sub-MOA 3-shot group at 100 yards with premium factory ammo

Howa superlite super lite lightweight hunting rifle stocky's carbon stock varmint 6.5 creedmoor .308 win

The Howa Super Lite also has some interesting mechanical features, including machined receiver and gorged bolt, tool-less firing pin removal, and a reliable M-16 style extractor/ejector. CLICK HERE for more INFO on HOWA Super Lite rifles and the rest of the Legacy Sport International product line.

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August 21st, 2024

Quigley-Ford Patented Dual Focal Plane 5-20X Hunting Scope

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Long Range Scope for Hunters — Quigley-Ford Dual Focal Plane

By James Mock
I recently tested a 5-20x50mm Quigley-Ford Dual Focal Plane Scope. This unique $3049.00 optic essentially offers DUAL focal reticles. The primary reticle is in the First Focal Plane while there is a SECOND reticle in the Second Focal plane. How is that possible? The scope is basically a First Focal Plane one, but there is an secondary Second Focal Plane reticle that does not change size (or thickness) when the magnification level changes. Quigley-Ford states: “The ONLY long range scope that is built with dual focal plane capability (without electronics or batteries) to make it effective for both long range shots AND close up.” The design holds U.S. Patent #D943050. This scope is assembled in Canada with German-crafted HD multi-coated lenses and a main tube from China.

quigley-ford ford dual focal plane long range hunting scope optic FFP SFP

The manufacturer explains: “The patented Dual Focal Plane scope provides a super bold Second Focal Plane etched aiming point … on all power settings PLUS a First Focal Plane reticle to provide the ability to shoot at any distance on any power. With this innovative combination a hunter in near darkness, using the lowest power setting can still pick up an aiming point on an animal with ease.” See how it works:

quigley-ford ford dual focal plane long range hunting scope optic FFP SFP

As seen in the photo, the two dark horizontal lines are in the second focal plane and are there to aid the “hunter” when the power is turned down and the fine cross hairs are difficult to see. This is an ingenious arrangement that allows one to use low power settings in dim light without losing sight of the reticle. NOTE: When ordering one of these scopes, one must give Randy Ford the particulars of the load to be shot. The required data includes caliber, bullet weight, bullet BC, and velocity. My load data sent to Randy was: 32.2 grains Varget, CCI 400 SR primer, 108gr Berger BT at 2910 FPS.

Randy emphasized that there are other factors to consider such as altitude, but his reticle is seldom off on distant targets more than 2 inches. He repeated that his system is designed for the hunter to quickly find an aiming point. They recommend a default altitude of 5000 feet. That way the reticle will still be very effective from sea level to 10,000 ft.

To set up the FFP system, one zeroes the rifle at 200 yards. The center crosshair will be for 200 yards with hash marks to 1000 yards with smaller marks between the longer 100-yard marks.

In the photos below, I first shot over the chronograph to check my velocity. It is very important to match the velocity for which the reticle was designed. The velocity was within a few FPS of the velocity I provided to Randy. His system utilizes marks for hold-over rather than having to dial the scope. It is a very ingenious system. Although I am 79 years old, I still enjoy shooting. I wish I could have had a scope like this one when shooting at a mule deer in Colorado back in 1980. After checking velocity, one must obtain a 200-yard zero. I did this at my friend Kent Bennett’s 200-yard range…on which I have shot for many years. My rifle is a Stolle Panda with 28″, 1:7.5″-twist Krieger barrel chambered in 6mm Dasher.

quigley-ford ford dual focal plane long range hunting scope optic FFP SFP

Speaking of Kent, he was impressed with his initial contact with this scope. He stated that the optics were very sharp and clear. I will add that the adjustments were spot on and the parallax was easily removed. My next trip to the range was to another friend’s 600-yard range.

Reticle Position: Dual Focal Plane (DFP)
Objective Lens: 50mm
Tube Diameter: 30mm
Power Range: 5X to 20X
Eye Relief: 3-4 inches

Parallax Adjustment: Side-focus
Click Adjustments: 1/4″ @ 100 yards
Length: 15.75″ plus sunshade
Weight: 25.5 ounces
Finish: Matte black

quigley-ford ford dual focal plane long range hunting scope optic FFP SFPWith the preparations completed, I took my Dasher with the Quigley-Ford scope to a friend’s range. He had targets set up at 200, 300, 400, and 600 yards. The morning was foggy with light drizzle, but the rain held off until I finished the test.

I started by checking my 200-yard zero and it was close, although not perfect. Next, I shot 300 yards, 400 yards, and at a 600-yard steel gong. The 300-yard shot (shown at right) was perfect except for being a tad right. I was very satisfied with the results so far. I skipped 500 yards temporarily, but went to the gong at 600 yards. There was a very satisfying “bong!” when the 108gr bullet arrived. This showed that the scope can provide precise elevations for distances from 200 to 600 yards.

quigley-ford ford dual focal plane long range hunting scope optic FFP SFP

I then set up a plywood dummy deer (crafted by my son years ago) at 500 yards and shot it twice. One shot was with the 108gr Berger BT and the other was with a 105gr, Bart’s VLD. Both were about 2910 FPS and have a BC that is very close. When I went to the target, I was pleasantly surprised in that the bullets were close to center and less than 1 inch apart. Both were 10s and one was an “X”.

Conclusion: I will continue more testing of this Dual Focal Plane scope. So far, I find that it is a very worthwhile addition to a long-range hunter’s rifle. I was amazed at how precise the reticle was from 200 to 600 yards. The Dual Focal Plane functionality is unique and very useful — offering the “best of both worlds” for hunting — you have a highly visible horizontal bar, combined with a FFP reticle which allows precise holds at multiple ranges. Stay tuned, James Mock.

Permalink - Articles, Hunting/Varminting, Optics 2 Comments »
August 16th, 2024

How Altitude Affects Ballistics — Important for Hunters

altitude ballistics zeiss LRP S5 318-50 FFP scope
Photo shows the new ZEISS LRP S5 318-50 first focal plane (FFP) scope.

“A bullet launched at a higher altitude is able to fly slightly farther (in the thinner air) for every increment of downward movement. Effectively, the bullet behaves as if it has a higher ballistic coefficient.”

A few seasons back a good friend ventured to the high country of Colorado to pursue elk. He recently zeroed his rifle in California, at a range just a few hundred feet Above Mean Sea Level (AMSL). He wondered if the higher altitude in Colorado could alter his ballistics. The answer is a definite yes. However the good news is that free ballistics calculators can help you plot reliable drop charts for various shooting locations, high or low.

Suunto AltimeterThe question has been posed: “What effect does altitude have on the flight of a bullet?” The simplistic answer is that, at higher altitudes, the air is thinner (lower density), so there is less drag on the bullet. This means that the amount of bullet drop is less at any given flight distance from the muzzle. Since the force of gravity is essentially constant on the earth’s surface (for practical purposes), the bullet’s downward acceleration doesn’t change, but a bullet launched at a higher altitude is able to fly slightly farther (in the thinner air) for every increment of downward movement. Effectively, at higher altitudes, the bullet behaves as if it has a higher ballistic coefficient.

Forum member Milanuk explains that the key factor is not altitude, but rather air pressure. Milanuk writes:

“In basic terms, as your altitude increases, the density of the air the bullet must travel through decreases, thereby reducing the drag on the bullet. Generally, the higher the altitude, the less the bullet will drop. For example, I shoot at a couple ranges here in the Pacific Northwest. Both are at 1000′ AMSL (Above Mean Sea Level) or less. I’ll need about 29-30 MOA to get from 100 yards to 1000 yards with a Berger 155gr VLD at 2960 fps. By contrast, in Raton, NM, located at 6600′ AMSL, I’ll only need about 24-25 MOA to do the same. That’s a significant difference.

Note that it is the barometric pressure that really matters, not simply the nominal altitude. The barometric pressure will indicate the reduced pressure from a higher altitude, but it will also show you the pressure changes as a front moves in, etc. which can play havoc w/ your calculated come-ups. Most altimeters are simply barometers that read in feet instead of inches of mercury.”

As Milanuk states, it is NOT altitude per se, but the LOCAL barometric pressure (sometimes called “station pressure”) that is key. The two atmospheric conditions that most effect bullet flight are air temperature, and barometric pressure. Normally, humidity has a negligible effect. It’s important to remember that the barometric pressure reported on the radio (or internet) may be stated as a sea level equivalency. So in Denver (at 6,000 feet AMSL), if the local pressure is 24″, the radio will report the barometric pressure to be 30″. If you do high altitude shooting at long range, bring along a Kestrel, or remember to mentally correct the radio station’s pressure, by 1″ per 1,000 feet.

Trajectory of Bullet fired at Sea Level

Trajectory of Bullet fired at 20,000 feet

You can do your own experimental calculations using JBM Online Ballistics (free to use). Here is an extreme example, with two printouts (generated with Point Blank software), one showing bullet trajectory at sea level (0′ altitude) and one at 20,000 feet. For demonstration sake, we assigned a low 0.2 BC to the bullet, with a velocity of 3000 fps.

To learn more about all aspects of Exterior Ballistics, Hornady has a useful discussion of External Ballistics including the effects of altitude and temperature. To dig deeper, Sierra Bullets has a comprehensive Exterior Ballistics Resource Page with multiple sections from the Sierra Manual (4th and 5th Editions), including:

Section 3.0: Exterior Ballistic Effects on Bullet Flight
Section 3.1: Effects of Altitude and Atmospheric Conditions
Section 3.2: Effects of Wind
Section 3.3: Effects of Shooting Uphill or Downhill

Example from Section 3.0: “When a bullet flies through the air, two types of forces act on the bullet to determine its path (trajectory) through the air. The first is gravitational force; the other is aerodynamics. Several kinds of aerodynamic forces act on a bullet: drag, lift, side forces, Magnus force, spin damping force, pitch damping force, and Magnus cross force. The most important of these aerodynamic forces is drag. All the others are very small in comparison when the bullet is spin-stabilized.”

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