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January 26th, 2019

SHOT Show 2019 — Video Showcase

Shot show 2019 video product show demo

There is so much to see at SHOT Show, with nearly 2000 exhibitors showcasing tens of thousands of products. SHOT Show is the largest trade show of its kind in the world, attracting 60,000+ attendees from more than 100 countries.

Thankfully there are many teams of reporters who covered SHOT Show this year, and they’ve now posted a wide selection of video reports. In today’s SHOT Show video showcase, we post our “pick of the litter” — ten of our favorite video reports from SHOT Show 2019, plus one great video “blast from the past”.

High-Tech Hunter — Modular Strasser Rifle

The Strasser rifle from Austria has many interesting design features including an interchangeable bolt head and an easy, rapid barrel-swap system. MORE INFO HERE.

Media Day Mini-Gun Mania — 25 and 50 Rounds per Second!

This full-auto, multi-barrel Mini-Gun has two speeds — 25 and 50 Rounds per Second!

CLICK HERE to SEE NINE More Videos »

Permalink - Videos, Bullets, Brass, Ammo, Gear Review, Handguns, News, Optics, Tactical No Comments »
January 26th, 2019

SHOT Show 2019 — Free SHOT Daily Digital Editions

FREE SHOT Daily Magazine issuee digital edition

FREE Digital Editions of SHOT Show Daily
Below you’ll find FREE digital editions of the SHOT Show Daily. This is the publication handed out at SHOT Show. Packed with stories and photos, each edition has a special theme for the new products covered. The daily news of the 2019 Las Vegas SHOT Show is produced by Bonnier Corporation and NSSF®. These are definitely worth checking out — there are hundreds of photos of new products.

NOTE: To READ TEXT, Click Full Screen Bracket Icon at lower right of each frame: [ ]

SHOT Daily DAY ONE

SHOT Daily DAY TWO

SHOT Daily DAY THREE

SHOT Daily DAY FOUR

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January 26th, 2019

Suppressors — Why You Still Need Hearing Protection

suppressor silencer moderator facts fiction sound levels noise decibles dB
Silencer-equipped AR photo courtesy The Silencer Shop.

OK, you’ve paid the tax stamp and acquired your new suppressor (aka “silencer” or “moderator”). Do you still need to wear earplugs or muffs? Absolutely. Even with that expensive new “can”, your rifle could be generating over 140 decibels (dB) of noise — about the same as as an unmuffled 9mm pistol shot. That’s loud enough to create permanent hearing loss with repeated exposure.

Firearms Are Loud: 140 dB to 175 dB

Audiology group ASHA explains: “Exposure to noise greater than 140 dB can permanently damage hearing. Almost all firearms create noise that is over the 140-dB level. A small .22-caliber rifle can produce noise around 140 dB, while big-bore rifles and pistols can produce sound over 175 dB. Firing guns in a place where sounds can reverberate, or bounce off walls and other structures, can make noises louder and increase the risk of hearing loss. Also, adding muzzle brakes or other modifications can make the firearm louder. People who do not wear hearing protection while shooting can suffer a severe hearing loss with as little as one shot[.] Audiologists see this often, especially during hunting season when hunters and bystanders may be exposed to rapid fire from big-bore rifles, shotguns, or pistols.” Source: ASHA, Recreational Firearm Noise Exposure.

suppressor silencer moderator facts fiction sound levels noise decibles dB

Suppressors, On Average, Reduce Noise Levels about 30 Decibels
In an article for Ammoland, gunwriter Sam Hoober says that you can expect about 30 decibels (dB) of noise reduction from the average suppressor: “Looking at a few different products, SilencerCo attests their suppressors reduce the sound pressure of a 9mm gunshot to anywhere from 125.7 dB to 131.5 dB, depending on the model. Advanced Armament Co, another popular supplier, attests a 23 dB to 33 dB reduction or down to 127 dB. Liberty Suppressors, another manufacturer, attests a reduction of 24 dB to 38 dB, depending on model and other factors. In short, we can presume something on the order of 30 dB of attenuation as an average.”

Using that 30 dB number you can quickly discern that you’ll still need hearing protection — good hearing protection — when shooting any suppressed firearm (even a .22 LR). “Spikes of 130 dB and more can result in permanent hearing damage instantly”. Source: NRA Blog.

The Myth of the “Quiet” .22 LR
The NRA Blog notes that “many rimfire shooters, particularly those using the beloved .22 Long Rifle cartridge, argue that the small .22 LR caliber doesn’t produce enough sound to damage your hearing”. So, is that really true. or is it a myth?

In fact, a .22 LR can be much louder than you think — a .22 LR pistol can produce sound levels of 134 dB. That’s well above the normal human pain threshhold.

Sound Levels for Common Noises:

9mm Luger pistol: 160 dB

Jet aircraft engine (near): 140 dB

.22 LR pistol: 134 dB

Normal human pain threshold: 120 dB

Noisy Nightclub: 110 db

Riding Motorcycle at 65 mph: 103 db

Power Lawnmower: 95 dB

Hearing damage possible: 85 dB (sustained for 8+ hours)

Ringing Telephone: 80 dB

Normal conversation: 60 dB


The Risk of Hearing Loss
Hearing loss can be progressive and irreversible. If you are a shooter, this is serious business. As the NRA Blog cautions: “You may not even realize you’re harming your hearing. Hearing loss occurs gradually, and can go effectively unnoticed until symptoms become severe. By then, the damage is done.”

Nobody wants to go deaf. But we often see shooters without effective hearing protection when they are walking around a few yards behind the firing line. That’s bad — even if you are away from the firing line, gunshot noises can damage your hearing. You MUST use effective hearing protection every time you go to the range. Good foam earplugs costs mere pennies but they can prevent deafness in your later years. Many folks also wear muffs over plugs.

Permalink Hunting/Varminting, Tech Tip 2 Comments »
January 25th, 2019

SHOT Show 2019 — Scopes, Spotters, and Electro-Optics

SHOT Show Optics Scopes rangefinder spotting scope

At SHOT Show 2019, some of the most impressive new products were in the realm of scopes and electro-optics. We are seeing big companies like Leica, SIG Sauer, Swarovski, and Zeiss moving big-time into the technological marriage of microchips and lenses. With the release of the $4500 Swaro dS, a scope with no manual windage or elevation controls, we are really entering a new era in aiming systems for shooters.

Swarovski dS Rangefinder Scope with Ballistics “Brain”

SHOT Show Optics Swarovski dS rangefinder laserscope scope

Swarovski rolled out a new flagship scope this year at SHOT Show, the remarkable dS 5-25×52 P. This $4500+ wonder features a built-in laser rangefinder (like the Burris Eliminator). But there’s more — working with a smartphone App, the dS incorporates a sophisticated ballistics computer that calculates your trajectory at any distance and then displays an aim point on your reticle. It even adjusts the aim point for the wind (with data entered wirelessly via mobile device).

This really is a state-of-the-art electro-optical system. However, there are some negatives to consider. First there are no conventional elevation or windage knobs/turrets. So, if your battery dies in the field, you are SOL. (FYI that big “turret” in the middle is actually just a battery and tool holder). Secondly, all that smart calculation depends on extremely accurate BC and velocity data. If you switch ammo, and don’t have an accurate velocity or BC, you won’t get the right solution and there are no knobs to turn to fix that. The dS will give you an aim point, but it might not match your true ballistics. (NOTE: There are hidden mechanical controls for setting your zero, but these are not intended for conventional shot to shot adjustments).

High-Magnification Competition Scopes

SHOT Show Optics Scopes Kahles 10-50x60mm scope

Kahles K1050 — Central Parallax, Great Glass
Kahles scopes are now being used by many of the top shooters in PRS game. Kahles optics offer great European glass, precise controls, and some unique features. Our readers may not realize that Kahles makes an outstanding high-magnification zoom scope suitable for long-range benchrest and F-Class comptition, the Kahles K1050. This 10-50x56mm optic has a unique centrally mounted parallax control — great for lefties or guys who run a left port/right eject. The Kahles K1050 has a true 8 meters to infinity parallax adjustment range making it suitable for everything from Field Target air gun, 1000-yard competition, and long range tactical. The Kahles K1050 costs $2899.00 — that’s midway between a Vortex Golden Eagle and a 10-60x56mm March High Master (starting at $3425.00).

SHOT Show Optics Scopes Sightron 10-50x60mm spotting scope

Sightron SIII 10-50x60mm
Sightron offers a very affordable 10-50x60mm scope in its SIII optics line. There is a special version for Field Target competition that comes with a “Big Wheel” parallax control. Field Target competitors use the Parallax control to determine target range.

ELR Scope — For 2 Miles and Beyond

March 6-60X Genesis with 400 MOA elevation
A typical premium riflescope might have 50-60 MOA of elevation. That’s enough for shooting out to 1500 yards or so with a high-BC bullet launched at 2900 fps. But for Extreme Long Range (ELR) shooting you need more elevation adjustment, and that’s where the innovative March 6-60X Genesis optic stands out. This unique optic offers a whopping 400 MOA of elevation adjustment. That ample elevation doesn’t come cheap however — the 6-60x56mm Genesis sells for $6950.00. CLICK HERE for full specifications.

Lightweight Hunting Scopes

As scopes have grown increasingly sophisticated and complex, they have also become bulkier and HEAVIER. That’s a big deal for a hunter who may be carrying a rifle, plus another 20-30 pounds of gear and food/water. The average dear hunter will be taking a shot well inside 400 yards so he doesn’t need 25X power or fancy features. He does need clarity, good low-light performance, and reliability — and LOW WEIGHT. We think a good deer hunting scope should come in under 1.5 pounds (without rings). Here are two smart hunting optics, both under 20 ounces.

Leupold VX Freedom — 12.2 ounce Weight, Simple, Affordable
The Leupold VX-Freedom 3-9x40mm weighs just 12.2 ounces and street price is under $200. It has a 4.7mm exit pupil, 60 MOA of elevation, and a 33.7 ft Field of View at 100 yards.

Zeiss conquest V4 3-12x44mm

Zeiss 3-12x44mm Conquest — 18.2 ounce Weight, 90% Light transmission, 4X Zoom
These riflescopes were designed as a lightweight, high-performance product line for demanding hunting and shooting applications. The Zeiss 3-12x44mm Conquest delivers 90% to-the-eye light transmission, along with 70 MOA of both elevation and windage travel. This premium second focal plane scope weighs just 18.2 ounces, slightly over one pound.

Compact Spotting Scopes for Field Carry

Many shooters and hunters don’t want or need a heavy, bulky spotting scope. They need a spotter to see mirage, and to deliver more magnification than can be comfortably handheld with binoculars. For hunters, weight and overall size are key. The hunter wants a spotting scope that can be packed and carried easily. Here are two clear, sharp spotter options in a smaller format. The Leupold Gold Ring 15-30x50mm Compact Spotter is particularly well-suited to hunters and tactical shooters.

Nikon Monarch Fieldscope 60mm 18-48x spotting scope

Nikon Monarch Fieldscope 60ED-A
Small but powerful — that describes the Nikon 60ED-A Monarch Fieldscope with 16-48X eyepiece. This unit delivers big spotter performance in a much smaller package. It focuses fast and showed very good sharpness though we observed the image darkens at higher magnifications. This has ED glass and Nikon’s proprietary “field flattener” lens system that enhances sharpness throughout the entire field of view.

Leupold Golden Ring 15-30x50mm compact spotting scope

Leupold 15-30x50mm Gold Ring Compact Spotting Scope
The affordable Leupold Gold Ring Compact Spotter offers 15-30X magnification. That’s plenty for spotting game or viewing mirage. This unit is remarkably compact and we like the simple right-side focus knob. Half the size of typical spotting scopes, this Compact Leupold spotter weighs just 21.5 ounces (1.34 pounds).

Superb Binoculars — When Cost is No Object

Leica Noctivid 8x42 binoculars

Leica Noctivid 8x42mm Binoculars
Our Hunting Editor Colton Reid is a Ph.D. who works with specialized electro-optical devices costing over $30,000. So he knows a few things about light waves and glass quality. When he looked through the 8×42 Leica Noctivid his comment was simple but telling: “These are the best compact binoculars I’ve ever looked through. The clarity and brightness are truly exceptional”. At nearly $2700.00, Noctivids are crazy expensive, but the quality will be worth it to some buyers.

Parting Shot — Think about the Warranty BEFORE You Buy

Vortex Razor spotting scope warranty

This patched-up Razor spotting scope was on display at the Vortex booth. We actually know the history of this particular spotter — it belonged to one of our Forum members. He sent this busted unit back to Vortex, and Vortex sent him a brand new Razor spotter. That Forum member told us: “Vortex earned a customer for life when they replaced my spotter, no questions asked. When Vortex says its warranty is ‘Unlimited, Unconditional, Lifetime’, believe it.”

Permalink - Articles, Gear Review, News, Optics No Comments »
January 25th, 2019

World’s Highest Magnification Rifle Scope: March 8-80x56mm

March optics scopes 8-80 8-80x56 tactical scope more power

When it comes to long-range optics, some folks can’t have too much magnification. At 500 yards and beyond, when the air’s misty or the mirage is thick, you can’t always use extreme magnification. But, when the conditions are excellent, it’s nice to have 50X magnification (or more) on tap. You can always “crank it back down”.

Higher magnification (when conditions are good), can help you see your bullet holes at long range, and that makes it easier to judge your hold-offs and keep your group centered.

In addition, there’s no doubt that high magnification lets you aim more precisely, no matter what the distance. Even at 100 and 200 yards, short-range benchresters are using 40X, 50X, and even 60X power scopes. This allows you to position your cross-hairs with extreme precision — something you need when you’re trying to put multiple shots through the same hole.

Raising the Optics Bar
How much power is usable? A few years back, folks said you can’t use more than 45X or so at long range. Well, as modern optics have evolved, now guys are buying scopes with even more magnification — way more. There are practical limits of course — with a 56 to 60mm front objective, the exit pupil of a 60X or higher-power scope will be very tiny, making head orientation ultra-critical. Any many scopes get darker as you bump up the magnification.

March optics scopes 8-80 8-80x56 tactical scope more power

Despite the exit pupil and brightness issues, shooters are demanding “more power” these days and the scope manufacturers are providing new products with ever-greater magnification levels. Right now, the most powerful conventional riflescope you can buy is the March X-Series 8-80x56mm scope. Featuring a 34mm main tube and 56mm objective lens, this offers a true 10-times zoom ratio and up to 80X magnification. This scope has minimal distortion thanks to high-quality ED lenses designed in-house by Deon Optical, which also machines the main tube from one solid piece of billet aluminum.

MORE INFO: Learn more about the March 8-80x56mm at MarchScopes.com

To demonstrate the capabilities of high-magnification March scopes, Aussie Stuart Elliot has created a cool through-the-lens video with the March 8-80x56mm scope set at 80-power (See 0:30 timeline). Along with being one of Australia’s top benchrest shooters, Stuart runs BRT Shooters Supply, dealer for March Scopes in Australia. In the video below you can see the March 8-80X focused on a target at 1000 yards (910m). For best resolution, watch this video in fullscreen, 720p mode.

Look through the Lens of 80-power March Scope at Target 1000 Yards Away

Through-the-Lens Views at 40X and 80X at 1100 Yards
To reveal the difference between 40X and 80X magnification, here are two through-the-lens still images taken with March scopes sighting to 1100 yards. The top photo is at 80X magnification, looking through the March 8-80x56mm. The lower photo is at 40X magnification viewed through a 5-50x56mm March X-Series scope. You can see there is a big difference in perceived target size! Click on the “Larger Image” button to see full-screen version at 80X.


larger photo

Video Find by Boyd Allen. We welcome reader submissions.
Permalink Gear Review, Optics, Tech Tip 18 Comments »
January 24th, 2019

SHOT Show 2019 — Eye-Catching Products

Shot show 2019 eley

There are tens of thousands of products on display at SHOT Show, the world’s largest firearms industry trade show. We visited dozens of manufacturers to see their featured items on display. Here are our selections of interesting products as well as some eye-catching product displays. Check out the cutaway Redding dies, the Norma giant plexiglass bullet shell.

Volquartsen .22 LR Ultralite with ModShot Carbon Stock, 3.8 LBS

Volquartsen ultralite ModShot carbon .22 LR rimfire rifle

Volquartsen showcased a radical rimfire rifle with “carbon everything”. Designed for rapid-fire Steel Challenge games, this unique rig has a carbon-wrapped barrel, carbon buttstock shaft with an aluminum buttplate, and a carbon fiber handhold forward of the action. The ModShot stock secures the bottom of the action, provides attachment points for rear section and front handhold. Total weight (without optics) is just 3 pounds, 13 ounces! MSRP is $1733.00. Our hunting editor, Colton Reid, said this “bare bones” carbon-enhanced design could be adapted for an ultralight centerfire hunting rifle under 5 pounds.

Redding Cutaway FL and Neck Sizing Dies

Redding Cutaway Sizing and Seating FL bushing full lenght micrometer Dies

At the Redding booth, we saw interesting sets of “cutaway” sizing dies. It was cool to see the insides of various types of dies. In the photo above the top two dies are micrometer-top dies. Below are three sizing dies: neck-sizing bushing die at left, a “plain” full-length sizing die in the middle, and a bushing full-length sizing die on the right. The bushing FL die would be our first pick — it allows you to size the entire body of the case, while adjusting neck tension (and bullet “grip”) with the neck bushings.

F-Open Champion with Kestros ZR Stock

Kestros ZR McMillan

Today, January 24th, Norm Harrold, the current F-Open 2018 national champion and 1000 yard record holder, appears at the McMillan booth. In the video above he’s holding the advanced, long-wheelbase Kestros ZR stock he used to set the new National Record and capture his F-Open title. Norm will explain the features of this stock that make it shoot so well. The Kestros ZR’s low COG and long wheelbase help the stock track and resist torque.

Christensen Arms Modern Precision Rifle

SK Ammunition .22 LR rimfire sheet cartridge

Our buddy Jason Baney was mighty impressed with the Modern Precision Rifle from Christensen Arms. With a handsome desert bronze finish, this rifle features carbon-wrapped lightweight barrel, carbon handguard/forearm, and carbon cheek piece. The folding buttstock folds quickly and secures with a magnetic lock. The rifle comes with a sub-MOA accuracy guarantee, and is available in 8 chamberings: .223 Rem, 6.5 Creedmoor, 6.5 PRC, .308 Win, 300 PRC, .300 Win Mag, .300 Norma Mag, and .338 Lapua Mag. Jason was so impressed with this $2295 rifle he said: “this could be my next hunting field rifle”. He said the folding stock really is an advantage when trekking long distances.

Rimfire Cases — How They Are Formed

SK Ammunition .22 LR rimfire sheet cartridge

At the Capstone Precision Group booth, we saw a long sheet of shiny brass metal. We were fascinated. This sheet illustrated how SK .22 LR casings are created from brass, started with a dime-sized flat circle, then ending with an extend narrow cylinder. This then becomes the case which receives the priming material (in the rim), powder and bullet. This is not identical to the actual factory production process, but it does show the key stages of rimfire case “punching” and drawing.

Frankford Arsenal New Compact Rotary Tumbler

SK Ammunition .22 LR rimfire sheet cartridge

Rotary tumblers do a fine job cleaning brass with media in liquid solution. There are many large rotary tumblers on the market. But frankly most are bigger than needed by rifle shooters who might just clean 100-200 pieces of brass at a time. Frankford Arsenal developed a smaller tumbler that runs smaller batches efficiently. Good idea. Look for this product at MidwayUSA in a few months. It should be significantly cheaper than Frankford Arsenal’s large, 7-liter Platinum tumbler which sells for $165.00 on Amazon.

Norma’s Giant See-Through Cartridge Display

Norma bullets brass Ammunition giant cartridge model display

Norma, maker of excellent brass, bullets, and loaded ammunition, had a eye-catching prop for displaying Norma bullets and cartridge brass. Over four feet long, this one-of-a-king plexiglass cartridge half-model held hundreds of projectiles and casings. Eye-catching for sure.

AMP Mark II — Runs Longer, Cooler, And Does .50 BMG

SK Ammunition .22 LR rimfire sheet cartridge

The makers of the Annealing Made Perfect (AMP) electro-induction annealing machine showcased a new, upgraded Mark II model. The new Mark II machine looks similar on the outside, but has a number of enhancements. It has bigger strong fans so it ran process more cases before you need to take a break to let the machine cool down. In addition, the Mark II now has a “super-sized” case chamber that can hold virtually any size case — all the way up to the .50 BMG. We watched as the AMP 2 annealed a jumbo .50 BMG in just a few seconds. Very impressive. For more info and pricing, visit www.AMPannealing.com.

Parting Shot — Goblin Green Race Pistol

eley green pistol 1911 race gun

Eley, the UK-based rimfire ammo maker, had a couple wild-looking race guns on display. This Metallic green stunner features a massive compensator, relieved slide (for faster cycling), and a color-coordinated C-MORE Reflex sight on top. Inconspicuous, this pistol is not!

Permalink Bullets, Brass, Ammo, Gear Review, New Product, News 1 Comment »
January 24th, 2019

How to Calculate Bullet RPM — Spin Rates and Stability

Spin rate stability bullet speed RPM Formula stabilization barrel twist
Photo by Werner Mehl, www.kurzzeit.com, all rights reserved.

Most serious shooters can tell you the muzzle velocity (MV) of their ammunition, based on measurements taken with a chronograph, or listed from a manufacturer’s data sheet. (Of course, actual speed tests conducted with YOUR gun will be more reliable.)

Bullet RPM = MV X 720/Twist Rate (in inches)

However, if you ask a typical reloader for the rotational rate of his bullet, in revolutions per minute (RPM), chances are he can’t give you an answer.

Knowing the true spin rate or RPM of your bullets is very important. First, spin rate, or RPM, will dramatically affect the performance of a bullet on a game animal. Ask any varminter and he’ll tell you that ultra-high RPM produces more dramatic hits with more “varmint hang time”. Second, RPM is important for bullet integrity. If you spin your bullets too fast, this heats up the jackets and also increases the centrifugal force acting on the jacket, pulling it outward. The combination of heat, friction, and centrifugal force can cause jacket failure and bullet “blow-ups” if you spin your bullets too fast.

Accuracy and RPM
Additionally, bullet RPM is very important for accuracy. Nearly all modern rifles use spin-stablized bullets. The barrel’s rifling imparts spin to the bullet as it passes through the bore. This rotation stabilizes the bullet in flight. Different bullets need different spin rates to perform optimally. Generally speaking, among bullets of the same caliber, longer bullets need more RPM to stabilize than do shorter bullets–often a lot more RPM.

It is generally believed that, for match bullets, best accuracy is achieved at the minimal spin rates that will fully stabilize the particular bullet at the distances where the bullet must perform. That’s why short-range 6PPC benchrest shooters use relatively slow twist rates, such as 1:14″, to stabilize their short, flatbase bullets. They could use “fast” twist rates such as 1:8″, but this delivers more bullet RPM than necessary. Match results have demonstrated conclusively that the slower twist rates produce better accuracy with these bullets.

On the other hand, Research by Bryan Litz of Applied Ballistics has shown that with long, boat-tailed bullets, best accuracy may be achieved with twist rates slightly “faster” than the minimum required for stabilization. The reasons for this are somewhat complex — but it’s something to consider when you buy your next barrel. If, for example, the bullet-maker recommends a 1:8.25″ twist, you might want to get a true 1:8″-twist barrel.

Calculating Bullet RPM from MV and Twist Rate
The lesson here is that you want to use the optimal RPM for each bullet type. So how do you calculate that? Bullet RPM is a function of two factors, barrel twist rate and velocity through the bore. With a given rifling twist rate, the quicker the bullet passes through the rifling, the faster it will be spinning when it leaves the muzzle. To a certain extent, then, if you speed up the bullet, you can use a slower twist rate, and still end up with enough RPM to stabilize the bullet. But you have to know how to calculate RPM so you can maintain sufficient revs.

Bullet RPM Formula
Here is a simple formula for calculating bullet RPM:

MV x (12/twist rate in inches) x 60 = Bullet RPM

Quick Version: MV X 720/Twist Rate = RPM

Example One: In a 1:12″ twist barrel the bullet will make one complete revolution for every 12″ (or 1 foot) it travels through the bore. This makes the RPM calculation very easy. With a velocity of 3000 feet per second (FPS), in a 1:12″ twist barrel, the bullet will spin 3000 revolutions per SECOND (because it is traveling exactly one foot, and thereby making one complete revolution, in 1/3000 of a second). To convert to RPM, simply multiply by 60 since there are 60 seconds in a minute. Thus, at 3000 FPS, a bullet will be spinning at 3000 x 60, or 180,000 RPM, when it leaves the barrel.

Example Two: What about a faster twist rate, say a 1:8″ twist? We know the bullet will be spinning faster than in Example One, but how much faster? Using the formula, this is simple to calculate. Assuming the same MV of 3000 FPS, the bullet makes 12/8 or 1.5 revolutions for each 12″ or one foot it travels in the bore. Accordingly, the RPM is 3000 x (12/8) x 60, or 270,000 RPM.

Implications for Gun Builders and Reloaders
Calculating the RPM based on twist rate and MV gives us some very important information. Number one, we can tailor the load to decrease velocity just enough to avoid jacket failure and bullet blow-up at excessive RPMs. Number two, knowing how to find bullet RPM helps us compare barrels of different twist rates. Once we find that a bullet is stable at a given RPM, that gives us a “target” to meet or exceed in other barrels with a different twist rate. Although there are other important factors to consider, if you speed up the bullet (i.e. increase MV), you MAY be able to run a slower twist-rate barrel, so long as you maintain the requisite RPM for stabilization and other factors contributing to Gyroscopic Stability are present. In fact, you may need somewhat MORE RPM as you increase velocity, because more speed puts more pressure, a destabilizing force, on the nose of the bullet. You need to compensate for that destabilizing force with somewhat more RPM. But, as a general rule, if you increase velocity you CAN decrease twist rate. What’s the benefit? The slower twist-rate barrel may, potentially, be more accurate. And barrel heat and friction may be reduced somewhat.

Just remember that as you reduce twist rate you need to increase velocity, and you may need somewhat MORE RPM than before. (As velocities climb, destabilizing forces increase somewhat, RPM being equal.) There is a formula by Don Miller that can help you calculate how much you can slow down the twist rate as you increase velocity.

CLICK HERE for Miller Formula in Excel Spreadsheet Format

That said, we note that bullet-makers provide a recommended twist rate for their bullets. This is the “safe bet” to achieve stabilization with that bullet, and it may also indicate the twist rate at which the bullet shoots best. Though the RPM number alone does not assure gyroscopic stability, an RPM-based calculation can be very useful. We’ve seen real world examples where a bullet that needs an 8-twist barrel at 2800 FPS MV, would stabilize in a 9-twist barrel at 3200 FPS MV. Consider these examples.

MV = 2800 FPS
8-Twist RPM = 2800 x (12/8) x 60 = 252,000 RPM

MV = 3200 FPS
9-Twist RPM = 3200 x (12/9) x 60 = 256,000 RPM

Of course max velocity will be limited by case capacity and pressure. You can’t switch to a slower twist-rate barrel and maintain RPM if you’ve already maxed out your MV. But the Miller Formula can help you select an optimal twist rate if you’re thinking of running the same bullet in a larger case with more potential velocity.

Permalink Bullets, Brass, Ammo, Gunsmithing, Tech Tip 2 Comments »
January 23rd, 2019

SHOT Show 2019 — The Doors Open

anschutz rimfire .22 LR fortner match rifles shot show 2019

SHOT Show 2019 kicked off Tuesday, with tens of thousands of exhibitors, media members, and invitees streaming into the Sands EXPO Center in Las Vegas. This firearms industry trade show just gets bigger every year. We visited many of our favorite vendors including Capstone Precision Group (Berger, Lapua, SK, Vihtavuori), McMillan Fiberglass Stocks, Zeiss Optics, Redding Reloading, SIG Sauer, Smith & Wesson, Anschutz, and Target Vision/Longshot.

Here are some quick highlights from Day One of SHOT Show, a little bit of everything: Rifles, pistols, ammo, reloading gear, and some notable shooters.

Capstone Precision Group: Berger, Lapua, SK and Vihtavuori

Lapua brass ammo SK bullets scenar Capstone Precision shot show 2019

Capstone Precision Group showcased new products from its four companies: Berger Bullets, Lapua, SK, and Vihtavuori. Lapua showcases cartridge brass and loaded ammo, including new 6.5 Creedmoor ammo with the ultra-consistent Scenar-L bullets. Capstone also told us to expect large quantities of brass to be arriving in the USA soon, including the high-demand 6mmBR brass.

Berger bullets ELR solid match projectiles Capstone Precision shot show 2019

Berger will release new loaded ammo in Lapua brass. Options will include 6mm Creedmoor, which should be popular with the PRS crowd. In addition, Berger will offer an impressive new line of solid projectiles. These ultra-high-BC ELF Match Solids have optimal shapes to stay supersonic at longer ranges. They are an impressive option for the Extreme Long Range game.

McMillan — 6012-Yard Shot with ELR Rifle

McMillan Beast paul phillips elr rifle 6012 yard shot

At the McMillan booth, members of the Global Precision Group (GPG) Team showcased an impressive .416 Barrett ELR rifle. Team leader Paul Phillips explained how the team managed (on the 22nd shot) to hit a 48″x32″ target at the incredible distance of 6012 yards. Our friend Derek Rodgers, reigning F-TR World Champion, told us that this shows how the ELR sport has evolved. The rifle features a McMillan ELR Beast stock with a Bartlein Barrel on a massive BAT 50 action.The .416 Barrett rounds were loaded with 550 grain Cutting Edge bullets.

McMillan Beast paul phillips elr rifle 6012 yard shot

A Tacom Charlie/Delta TARAC prism system was fitted in front of the Nightforce scope, allowing the team to put over 625 MOA of elevation on the shot while still being able to see the target. The ballistics numbers for this 6012-yard shot are pretty mind-boggling: 625 MOA of elevation was required, and the bullet was in the air for 17.1 seconds!

New Products from LongShot Target Cameras (aka TargetVision)

TargetVision longshot camera system clay rhoden wife video cam

Our first stop at the show was at the LongShot Target Cameras booth. Here we met with company founder, Clay Rhoden, the bright young man who has created the best-performing wireless target cameras on the market. Most folks know Rhoden’s company as TargetVision, but Clay said they are re-branding as LONGSHOT Target Cameras, to help emphasize the extreme range capabilities of his latest systems (the top tier Longshot cameras can operate out to one mile and beyond). Clay showed us two new products, the latest target camera (with easy-to remove battery pack), and a special camera that will transmit video from a spotting scope to your mobile devices. See the latest products at www.longshotcameras.com.

Light-Weight Camo Hunting Rifles from Weatherby

Weatherby Mark V ultra lightweight rifle camouflage Cerakote Camo

Hunters can spend hundreds of dollars on the latest camouflaged clothing in order to blend in to their environment, so why do gun makers continue to produce shiny hunting rifles? Well, this is one thing Weatherby has gotten right with the latest Weatherby Mark V ultra lightweight rifles. The rifle has the option of a rugged, matte Cerakote finish on action, bolt, and barrel, effectively eliminating glare. And did I mention it’s light weight? The full rifle weights a mere 5.75 pounds for non-magnum calibers. Weatherby guarantees sub-MOA accuracy with factory ammunition out of the box. Add a decent lightweight scope and this rifle is ready for a long backcountry hunt.

Hot New Sub-Compacts from SIG Sauer, Kimber, Walther

Kimber Evo Walther CCP SIG P365shot show 2019

For shooters who carry concealed or simply prefer a more compact pistol, three new handguns really stood out at shot show 2019: the SIG Sauer P365, Walther CCP M2, and the Kimber EVO. All three guns had a similar weight and feel at roughly 1” width, 6” length, and 1 lb when empty. The P365 has an advantage with a 10 + 1 round capacity, compared to the 7/8 of the EVO and CCP M2, but the CCP M2 is more competitively priced with an MSRP starting at $469. Retail for the P365 starts at $599 and the Kimber a surprising $925. Expect to see these guns in stores between spring and summer of 2019.

Smith & Wesson — Handguns Galore and New T/C Performance Center LRR

Smith Wesson T/C LRR long range rifle revolver magnum shot show 2019

Smith & Wesson is not just a handgun company. It markets rifles under its own brand name as well as via its Thompson Center Arms (T/C) division. At SHOT Show 2019 we saw the T/C Performance Center LRR (Long Range Rifle). With a $1211.00 MSRP, this offers great “bang for the buck” for shooters competing in PRS production division. These rigs feature a modular aluminum chassis, 24″ barrel, and adjustable cheekpiece. Available chamberings include .243 Win, 6.5 Creedmoor, and .308 Win. And of course S&W continues to make great wheelguns, include some very BIG magnum revolvers:

Smith Wesson T/C revolver magnum shot show 2019

At the Anschutz Booth with Company President, Jochen Anschutz

anschutz rimfire .22 LR fortner match rifles shot show 2019

The German company Anschutz remains a world leader in rimfire rifles. The company’s match rifles have captured countless Gold Medals in Olympic target shooting and biathlong competition. Here company President Jochen Anschutz (left) shows the latest Biathlon rifle, featuring the impressive Fornter straight-pull action. With Jochen is Steven Bolter, North America Custom Shop Director. We were pleased to hear that Anschutz will be offering a new line of 17 HM2 (Mach2) rifles soon. That is an effective varmint round that’s considerable less expensive than 17 HMR.

Permalink Bullets, Brass, Ammo, Gear Review, Handguns, News No Comments »
January 23rd, 2019

Access Hodgdon and IMR Load Data in Reload Data Center

Hodgdon Reloading data Center hand loading powder

Hodgdon Reloading data Center hand loading powder

Hodgdon and IMR powders, including H4198, Varget, H4350, and IMR 4451, are some of the most successful propellants used by competitive shooters. If you want to find solid, reliable load data for these and other Hodgdon and IMR powders, we recommend you go right to the source — visit the Hodgdon/IMR Reloading Data Center, at www.HodgdonReloading.com. There you’ll find the latest, updated load recipes for pistol, rifle, and shotgun reloaders.

In the Data Center, you’ll find thousands of load recipes for pistol, rifle, and shotgun. Rifle shooters will find dozens of loads for their favorite Hodgdon, IMR, and Winchester powders such as H4198, Varget, H4350, and IMR 8208 XBR. And Hodgdon’s Reloading Center is now faster and easier to use. Navigation is simplified and the whole interface is more user-friendly.

Precise Search Results for your Cartridge and Favorite Powders
Hodgdon Reloading data Center hand loading powder

The online Reloading Data Center allows you to get precise search results for any listed cartridge. You can select your preferred powders and bullets. After choosing a cartridge, you can pre-select specific bullet weights and powder types. That quickly delivers just the information you want and need. You won’t have to scroll through scores of entries for bullets or powders you don’t use.

Data Center Works Well with Mobile Devices
Mobile users will notice Reloading Center is very “user-friendly” for smart-phone and tablet users. Controls have been optimized for touch-screens, and buttons are large and easy to use. Likewise the results are displayed in a large, easy-to read format.

Hodgdon tip from EdLongrange. We welcome reader submissions.
Permalink Bullets, Brass, Ammo, Reloading, Tech Tip 2 Comments »
January 23rd, 2019

‘Quit Neck Sizing’ — Cortina Explains Full-Length Sizing is Better

Full-Length Sizing Erik Cortina Neck Sizing Video

Our friend Erik Cortina is at Raton, NM this week at the F-Class Nationals. When he’s not shooting (or working) Erik produces YouTube videos. One of his most popular videos explained why you should full-length size cartridge brass. In no uncertain terms Erik says: “Quit Neck Sizing!!!” Watch the Video:

Why It’s Smart to Full-Length Size Your Brass

Commentary by Erik Cortina

Should You Full-Length Size Your Cartridge Brass?

Absolutely. Let Me Explain Why…

I have seen it time and time again, shooters on the line wrestling with their rifle trying to get the bolt closed while the wind is switching. They were too focused trying to get their bolt to close and getting their rifle settled back on the bags that they missed the wind switch. Bang… Eight! The straw that broke the camel’s back for me was at the 2017 Canadian Nationals. I was paired up with a young girl and she would try really hard to close the bolt on her rifle. The majority of the time she would get it to close, but often times she could not even get the round to chamber. She was focused on her rifle the entire time rather than on the conditions. When we completed our strings, she had five rounds that did not chamber our of 15! That is way too many!. I told her she needed to think about Full-length sizing with 0.002″ shoulder bump, or Controlled Full-length Sizing like I call it. I told her not to worry about losing accuracy. I told her that I full-length size all my rounds and asked if she noticed how smooth my bolt was and noticed my score. She said yes, they were both great!

Full-Length Sizing Erik Cortina Neck Sizing Video

Controlled Full-length Sizing Does NOT Harm Accuracy
I have found that Controlled Full-length Sizing does NOT hurt accuracy or shorten brass life. I find that I can focus much more on the conditions when I don’t have to think about chambering a round nor extracting it. It has become second nature. After firing, I keep my head welded to the stock, I open the bolt by placing my thumb on top of stock and rotating hand upwards. I reach in and retrieve spent case, place it back in ammo box, and pick up another loaded round and put in chamber. I verify conditions and when ready, I push the bolt in and close it with my index and middle finger.

With Controlled Full-length Sizing you “bump” the shoulder around .002″ for bolt guns.*
full length sizing
Image courtesy Sinclair International which carries a variety of Full-length dies.

Whidden Gunworks DiesWhidden Full-Length Sizing Dies
by AccurateShooter.com Editor
For proper Full-length sizing, you want a quality die that’s a very good match to your chamber. For our project rifles we usually turn to Whidden Gunworks which offers both bushing and non-bushing FL dies. And if you want the hot new option, check out Whidden’s patent-pending, click-adjustable FL-sizing die. This gives instant, precise control over shoulder bump. It works great.

*With gas guns, such as the AR10, you may want to increase shoulder bump to .003″ or more. With some benchrest cartridges, .0015″ bump may prove optimal. But .002″ is a good starting point.

Permalink - Videos, Bullets, Brass, Ammo, Reloading 2 Comments »