Eurooptic vortex burris nightforce sale




teslong borescope digital camera barrel monitor


As an Amazon Associate, this site earns a commission from Amazon sales.









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 »
January 22nd, 2019

Industry Day at the Range 2019 — Highlights

SHOT Show Industry Day at the Range

For folks in the gun industry, the third Monday in January is the best day of the year. Held in conjunction with SHOT Show, Industry Day at the Range lets us try out dozens of new rifles and pistols, as well as meet top gun designers and friends in the shooting sports. We saw some very great new products this year. Here are some of the most interesting “take-aways” from Industry Day at the Range, held in Bolder City, Nevada on January 21, 2019.

New Guns + Old Friends
Meeting old friends, and shooting new guns. That’s what Monday was all about at the annual Industry Day at the Range, a “hands-on” preview the day before SHOT Show opens in Las Vegas. Your Editor met with old buddy Jason Baney and Hunting Editor Colton Reid at the crack of dawn and headed out to the Boulder City (NV) range.

We were not disappointed — there was plenty to see this year. On display were a bunch of new precision rifles, a slew of new handguns, and some very exotic optics (including a turretless digital camera/riflesight).

Cool New Rifles and Chassis Systems

Savage MSR 10 Precision rifle new Stan Pate

Our friend Stan Pate let us try out Savage’s latest, greatest Modern Sporting Rifle, the MSR 10 Precision. Offered in 6mm Creedmoor, 6.5 Creedmoor, and .308 Win, this quality rig has many distinctive features, including side-charging handle, adjustable gas system, and convertible dual-angle pistol grip. This rifle proved exceptionally accurate on steel out to 400 yards. It is certainly one of the best AR10-class rifles we’ve tried.

Report from 6.5 Guys
Our good friends the 6.5 Guys (www.65guys.com) kicked off their 5th year of SHOT Show coverage at the Industry Day at the Range. At this event one can check out the latest firearms, putting guns through their paces with live fire demos. Here are two items that caught the eyes of the 6.5 Guys:

PGW Defense Timberwolf
Timberwolf rifle .338 Lapua Magnum Mag 6.5 Guys Ed Mobley

The PGW Defense Timberwolf rifle in .338 Lapua Magnum proved to be a relatively light-recoiling rifle considering the cartridge and overall rifle weight of 14.5 pounds. Even with gusting 7:00 o’clock side winds (with 20+ mph peaks), hitting targets at 1,000 yards was very doable — a reminder of what the .338 Lapua can deliver. Impressive rifle.

Oryx Chassis for Howa, Rem, Tikka, Ruger, and Savage
Oryx tactical hunting chassis Remington savage tikka Howa 6.5 Guys Ed Mobley

Oryx (an MDT brand) has introduced a chassis system for Howa, Remington, Tikka, Ruger and Savage actions that retails for $399. While it comes with a grip, the user can bolt on standard AR-15 grips. This affordable system comes with an adjustable cheek piece and length of pull.

Media Industry Day at Range SHOT 2019
Industry Day file photo courtesy CMG Marketing & Events.

Optics — New 7-35x56mm Leupold + Radical Israeli Sensight

Leupold showcased an impressive new scope that should interest F-Class and PRS shooters. Leupold’s new 7-35x56mm Mark 5HD optic had very good glass, and positive controls. At 33 ounces, it is quite a bit lighter than other scopes in this class. We don’t have exact pricing yet, but it should be much less expensive than a Nightforce ATACR scope with the same magnification range.

New Leupold 7-35x56mm Mark 5HD
sensight digital camera scope israeli SSR400

The new 7-35X Leupold models will be available with either milrad or MOA adjustments and advanced reticles. The milliradian models will be available in six reticle options: H-59, CCH, TMR, Tremor 3, and Tremor 3 Illuminated. The MOA version will be available with an Impact 60 MOA reticle.

Sensight SSR400 digital Riflesight
sensight digital camera scope israeli SSR400

A big step forward in digital optics is Sensight’s new SSR400 Digital Riflesight, basically a high-resolution digital camera with a microprocessor-controlled reticle. The system is self-contained in a lightweight, compact display that allows the firearm to be held and used as if it held a traditional rifle scope. The digital interface allows users to customize the display, record video, and even livestream the image. The display eliminates eye relief issues, making it easy to acquire targets at distances up to 400 yards. Beyond 400 yards the image becomes noticeably pixelated, but still allowed us to easily hit targets at that distance. The price is moderate.

Read Detailed Sensight SSR400 REVIEW on GunsAmerica.com »

Handguns — Rimfire and Centerfire

Industry day range january 2019

We viewed hundreds of pistols, shot a dozen or so, and came away with four we really liked. Two were suppressed rimfire pistols, and two were centerfire “Race guns”.

Ruger .22 LR MARK IV 22/25 Gold With Suppressor
Industry day range january 2019

We had fun trying out the Ruger MARK IV™ 22/45™ LITE fitted with a factory suppressor. Ruger had a new “bling” version on hand for test shooting. This was the Model 43926, with gold anodized aluminum upper receiver. This is ported for lightness — this pistol weighs just 25 ounces (without suppressor).

KelTec CP33 Suppressed Rimfire Pistol
keltec cmr-30 pistol .22 WMR

We shot a very impressive KelTec pistol derived from the KelTec CMR-30 .22 WMR carbine. This new CP33 pistol is mostly the same as the CMR-30, but with no stock and a different front section. The 33 in the name refers to the fact that the clear magazine holds 33 rounds of .22 LR ammo. The version we shot was suppressed, and it was a pleasure to shoot. The trigger is excellent — noticeably better than most other 22s on the market. With virtually no recoil, it was ultra-quiet and surprisingly accurate. This Editor was surprised that a KelTec was one of his favorite new handguns at Industry Day. KelTec says the first production run should start shipping in March, 2019.

Walther PPQ Q5 Match SF (Steel Frame)
SAS Bul Armory race gun 1911

Walther’s PPQ Q5 has been popular with action pistol competitors. Now Walther offers an enhanced SF (“Steel Frame”) version. We like how the pistol balances with the heavier, beefier steel frame. We expect the extra mass of the steel frame will also reduce muzzle flip and perceived recoil. This is available from Walther with iron sights or a Red Dot.

Bul Armory SAS 1911-Type Race Gun
SAS Bul Armory race gun 1911

Israel’s Bul Armory offers a wide range of defensive handguns and target pistols, including the SAS series of competition pistols. These impressive “Race Guns” feature compensators, relieved slides, flared magwells, and excellent match triggers. Needless to say these comp pistols are a hoot to shot — with superfast cycle rates for fast shot transitions.

Media Industry Day at Range SHOT 2019
Industry Day file photo courtesy CMG Marketing & Events.

Ammunition — Big News from Sierra and More

Sierra Will Offer Loaded Ammunition
The big news in the world of commercial ammunitions come from Sierra bullets. For the first time, Sierra will be offering Sierra-branded loaded ammo. Our good friend (and multi-time Nat’l Long Range Champion) Michelle Gallagher revealed that Sierra will offer a selection of high-quality factory ammunition in 2019.

Sierra Bullets Ammunition gamechanger

Sierra will be releasing its own brand of hunting ammunition. Sierra “Gamechanger” will debut in five popular hunting calibers: .243 Win, 6mm Creedmoor, 6.5 Creedmoor, .270 Win, and .308 Win. The rounds use a new tipped GameKing bullet for match grade accuracy in a hunting round. No details yet on brass, primer, and powder components for this ammo, but if the quality of the bullets is any indication these rounds will serve hunters well.

Norma Bullet monolithic solid hollowpoint

New Norma Monolithic Hollow Point Ammo
Norma unveiled some impressive new pistol ammunition. The new MHP (Monolithic Hollow Point) offers extreme expansion with major energy transfer. This MHP bullet features a lead-free solid core. This new MHP ammo offers serious performance for regions where lead-core bullets are prohibited. Accuracy is also very good with these new Norma bullets.

Great Products for Hunters and Varminters

We saw some impressive gear for game hunters and varminters. Swagger bipods has introduced a new kind of rifle support that combines the best qualities of both a field bipod and shooting sticks. And we saw a nice swivel field bench that offered very good stability.

Swagger Bipod hunting shooting sticks

Swagger demonstrated its new Stalker QD42 (quick detach) and Stalker Lite bipods. The QD42 is a lighter, more compact design of the already-established hunter series that allows for fast attach and removal via the push of a button. The quick attach/detach is a great feature that allows hunters to carry the bipod in their pack until it’s time to shoot. The Stalker Lite offers similar advantages in that it is extremely light and folds up like tent poles so it can be carried in a pack or side pocket. Both systems demonstrate the maneuverability swagger is known for and are reasonably priced.

Swagger Bipod hunting shooting sticks

Many Industry Day exhibitors were using the well-made and versatile DOA Shooting Bench. These benches feature a strong steel base supporting a very stable top that rotates to change rifle aim points in seconds. In addition, the DOA bench features a swivel seat. We liked the build quality on these DOA benches. Varmint hunters would like this bench — it would work well in a prairie dog field.

About Industry Day and the Range

With two dozen shooting bays, plus an elevated shooting station with targets out to 400 yards, there is plenty of action. Here’s the layout:
Media Industry Day at Range SHOT 2019

We definitely need to remember why we are able to continue to own and shoot firearms in this nation…
dog with ear muffs lens

Next best thing to being there — this 5-minute video, produced last year, shows Industry Day highlights. It’s a great overview featuring a wide variety of rifles, pistols and shotguns. The biggest commercial, hands-on “live fire” gun demonstration in the world, Industry Day at the Range is attended by over 1700 journalists and buyers.

keltec cmr-30 pistol .22 WMR

Media Industry day at range shot show 2019 Boulder City Nevada

Permalink Gear Review, Handguns, New Product, News, Optics 2 Comments »
January 22nd, 2019

Make Your Own Threaded Case for Measuring Length to Lands

Hornady Stony Point Tool OAL O.A.L. gauge bullet seating length ogive checker

In this video, Forum member Erik Cortina shows how to create a custom modified case for use with the Hornady Lock-N-Load Overall Length Gauge (formerly the Stoney Point Tool). While Hornady sells modified cases for many standard cartridges, if you shoot a wildcat such as the 6mm Dasher or .284 Shehane, you’ll need to create a custom modified case*. And even if you shoot a standard cartridge such as the .308 Winchester you can get more consistent measurements if you make a custom modified case from a piece of brass fired in your chamber.

The process is straight-forward. Take a piece of brass fired in your chamber and full-length size it (with about .002″ shoulder bump). Then you need to drill out the primer pocket. Erik uses a mini-lathe for the operation, but this general process can be done with a drill press or other tools. Erik shows how to do this with a 0.290″ HSS (High Speed Steel) drill bit on a mini-lathe. After drilling the hole comes the tricky part — you need to tap the case with the precise 5/16″ x 36 threads per inch (tpi) right-hand thread that matches the male thread on the O.A.L. Gauge. This 5/16″ x 36 tpi tap is pretty uncommon, but you can order it from Amazon.com if you can’t source it locally.

Hornady Stony Point Tool OAL O.A.L. gauge bullet seating length ogive checker

If you use a mini-lathe, Erik suggests loosening the tailstock slightly, so it can float while cutting the threads. Erik also says: “Make sure you get the tap on pretty tight — it’s going to want to spin.” Erik turns the case at about 100 rpm when tapping the threads. Once the case and tap are rigged, the actual tapping process (see video at 6:00) takes only a few seconds. While the mini-lathe makes the tapping process go more quickly, the threading can also be done with other systems.

TIP: Don’t just make one modified case, make three. That gives you one for your range kit, one for your home reloading bench, plus a spare (since you WILL eventually lose or misplace one).


Here’s the Stuff You Need

Hornady Stony Point Tool OAL O.A.L. gauge bullet seating length ogive checker

5/16″-36 TPI Threading Tap
The required thread is somewhat uncommon. You need a 5/16″ – 36 tpi Right Hand Thread Tap. If you can’t find it locally, Amazon.com carries the correct tap. Erik notes: “The 5/16-36 tpi tap is not a common size. I think Hornady did this on purpose to make it more difficult for the average guy to make his own modified cases.”

0.290″ Drill Bit
Erik uses an 0.290″ HSS “L” drill bit. (This “L” Letter Gauge code designates a 0.290″ diameter bit). A close metric equivalent would be 7.3 mm (0.286″). Erik says: “A 9/32″ drill will also work but it will be harder to run the tap in since the hole will be .281″ instead of .290″ with the Letter Gauge L bit.”

Tips for Using O.A.L. Gauge with Modified Case
We’ve noticed that many folks have trouble getting reliable, consistent results when they first start using the Hornady O.A.L. Gauge (formerly the Stoney Point Tool). We’ve found this is usually because they don’t seat the modified case properly and because they don’t use a gentle, consistent method of advancing the bullet until it just kisses the lands.

Here is our suggested procedure for use the O.A.L. Gauge. Following this method we can typically make three of four measurements (with the same bullet), all within .001″ to .0015″. (Yes, we always measure multiple times.)

1. Clean your chamber so there is no build-up of carbon, debris, or lube. Pay particular attention to the shoulder area.

2. Screw the modified case on to the O.A.L. Gauge. Make sure it is seated firmly (and doesn’t spin loose). Note, you may have to re-tighten the modified case after insertion in the chamber.

3. Place your selected bullet so that the ogive (max bullet diameter) is behind the case mouth. This prevents the bullet from “snagging” as you insert the tool in the action.

4. Insert the O.A.L. Gauge into your chamber smoothly. Push a little until you feel resistance. IMPORTANT — You need to ensure that the shoulder of the modified case is seated firmly against the front of your chamber. You may have to wiggle and twist the tool slightly. If you do not have the modified case seated all the way in, you will NOT get a valid measurement.

5. Advance the bullet slowly. (NOTE: This is the most important aspect for consistency!). Push the rod of the O.A.L. tool gently towards the chamber. DON’T shove it hard! Easy does it. Stop when you feel resistance.

6. IMPORTANT. After gently pushing on the rod, give the end of the rod a couple forward taps with your finger. If your bullet was slightly skewed, it may have stopped too far back. Adding a couple extra taps will fix that. If the bullet moves after the taps, then again push gently on the rod. NOT too much! You just want to push the bullet until it just “kisses” the lands and then stops. Do NOT jam the bullet into the rifling. If you do that you will never get consistent results from one measurement to the next.

* For a $15.00 fee, Hornady will make a custom modified case for you if you send two fired pieces of brass. Send two fired cases and $15.00 check to: Hornady Manufacturing, Attn: Modified Cases, 108 S. Apollo St., Alda, NE 68810. More Info HERE.

Permalink - Videos, Reloading, Tech Tip 2 Comments »
January 21st, 2019

RifleShooter.com .308 Win Barrel Cut-Down Velocity Test

rifleshooter.com barrel .308 win cut-down test saw ammo GMM velocity magnetospeed

With barrels, one wonders “Can a little more length provide a meaningful velocity gain?” To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28″ all the way down to 16.5″. The cuts were made in one-inch intervals with a rotary saw. At each cut length, velocity was measured with a Magnetospeed chronograph. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length.

rifleshooter.com barrel .308 win cut-down test saw ammo GMM velocity magnetospeed

READ RifleShooter.com .308 Win Barrel Cut-Down Test Article.

Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering)
How much velocity do you think was lost, on average, for each 1″ reduction in barrel length? The answer may surprise you. With a barrel reduction from 28″ to 16.5″, the average speed loss of the four types of .308 ammo was 261 fps total. That works out to an average loss of 22.7 fps per inch. This chart shows velocity changes for all four ammo varieties:

rifleshooter.com barrel .308 win cut-down test saw ammo GMM velocity magnetospeed

Summary of Findings: The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. By ammo type, the average loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP).

Interestingly, these numbers jive pretty well with estimates found in reloading manuals. The testers observed: “The Berger Reloading manual says for the 308 Winchester, ‘muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24″ barrel’.”

How the Test Was Done
The testers described their procedure as follows: “Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Average velocity and standard deviation were logged for each round. Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The barrel was cut off using a cold saw. The test protocol was repeated for the next length. Temperature was 47° F.”

rifleshooter.com barrel .308 win cut-down test saw ammo GMM velocity magnetospeed

CLICK HERE to Read the Rifleshooter.com Test. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. All in all, this was a very thorough test by the folks at RifleShooter.com.

Much Different Results with 6mmBR and a Longer Barrel
The results from Rifleshooter.com’s .308 barrel cut-down test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. When we cut our 6mmBR barrel down from 33″ to 28″, we only lost about 8 FPS per inch. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5″ longer than Rifleshooter.com’s .308 Win start length. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Powder burn rates can also make a difference.

Permalink Bullets, Brass, Ammo, Gear Review, Gunsmithing 4 Comments »
January 21st, 2019

Bargain Finder 174: AccurateShooter’s Deals of the Week

Accurateshooter Bargain Finder Deals of Week

At the request of our readers, we provide select “Deals of the Week”. Every 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.

1. MidwayUSA — MagnetoSpeed Sporter Chronograph, $159.99

Deals of Week Magnetospeed sporter Kit

If you have been waiting to get a Magnetospeed… wait no longer. Priced at just $159.99 at MidwayUSA, the Magnetospeed Sporter model costs less than half as much as Magnetospeed’s V3 models. This chronograph attaches directly to your barrel so you don’t have to go downrange to position tripods and set up skyscreens. For most people the Sporter Model contains all the features they need. Using Magnetospeed’s XFR adapter (sold separately), data can be transferred easily from the display module to your mobile device. READ Magnetospeed Sporter Review. NOTE: You need to add the item to cart to see the $159.99 price. This sells elsewhere up to $190.00.

2. Bruno Shooters Supply — Lapua Brass Sale

Lapua Brass Sale

This isn’t the first time we’ve featured Lapua brass from Bruno Shooters Supply. But you may want to act soon because prices are going up. Bruno’s is offering very good pricing now for existing Lapua brass inventory. However, Bruno’s managers tell us that future supplies will likely cost more — this will be the last opportunity to get Lapua Brass at low, 2018 mark-down prices. So get ready for the new shooting season and stock up on brass now with Bruno’s favorable pricing.

3. Amazon — Protektor Model Rear Bags

Protektor Model Bags

When it comes to rear bags there’s really only a few brands that the pros use and Protektor is always one of them. Protektor leather rear shooting bags are well made, hold up to abuse, and do their job rain or shine. Now you can purchase these quality Protektor rear rest bags from Amazon. That means you’re getting a very competitive price with super-fast Prime Shipping available. if you need a rear bag quickly for that next match, this is a smart option.

4. EuroOptic — Vortex Viper & Razor Close-Outs, Save Hundreds

Viper Vortex scope closeout sale discount Eurooptic

Here is an awesome deal on the popular Vortex Viper scopes, a top choice for hunters and tactical shooters. EuroOptic has slashed prices on last year’s model Vipers so you can save hundreds. Get the First Focal Plane (F1) 4-16x50mm Viper PST for $499.99. That’s a whopping $400 off the original price. Or, grab the higher-magnification F1 6-24x50mm Viper PST for $649.99, a $300 savings. Both scopes have a great reputation, and the Vortex warranty is second to none. Buy with confidence.

Viper Vortex scope closeout sale discount Eurooptic

If you want a true high-end tactical optic, there are also great deals on the premium Vortex Razor HD Gen II 4.5-27x56mm scopes — save $650.00.

5. EuroOptic — FN Pistol Sale

FN Pistol Sale

Who couldn’t use a quality pistol crafted by a legendary manufacturer for up to 45% off? EuroOptic is clearing out its FN America Pistols at super-low prices. Chose from a wide variety of models in popular chamberings such as 9mm Luger and .40 S&W. There are full-size, compact pistols, and sub-compact FN pistols on sale. For example the FNS-40 Compact NMS (.40 SW) is just $339.00, hundreds less than you’d pay for a compact Glock. If you are looking for a quality semi-auto handgun for targets shooting or self-defense, check out these deals.

6. Graf & Sons — Free Sierra Ballistics Software w/ $75 purchase

Sierra Ballistic Software

Graf & Sons is running a great promotion right now for anyone who is serious about precision hand-loading and long-range shooting. Purchase $75 worth of Sierra Bullets and get the Sierra Infinity Ballistics Software for FREE. That’s a $39.95 value just for buying the bullets you love to shoot anyway. The ballistics program is very sophisticated and includes hundreds of bullet profiles.

7. Amazon — 100-ct Pack of 7″ Reactive Splatter Targets, $22

reactive splatter targets

Anyone can print out paper targets but what’s the fun in that? For only $22.00 you can grab 100 of these multi-color reactive splatter targets and know exactly where your shots are landing. A bright-colored Hi-Viz “halo” appears each shot in the black bull. These targets are made of a weather-resistant material, so you can use them in light rain without worrying about them getting soggy or falling apart (as would normal paper targets). NOTE: Reactive splatter targets typically cost much more. With this deal each target costs just twenty-two cents, less than a quarter — a real bargain.

8. CDNN — Kryptek Sound Soldier 27 db NRR EarMuffs, $8.88

ear muff earmuff 27 nrr db kryptek highlander passive deal $8.88
Note: You get one set of muffs (either gray or camo, NOT both) for $8.88 plus S/H.

Good muffs that offer 27 db Noise Reduction and won’t spoil your cheekweld — for under ten bucks? Can’t argue with that. Right now CDNN is offering a killer deal on Kryptek Sound Soldier 27 NRR muffs that sell elsewhere for around $24.00. Get these in either Highlander Camo or Typhon Grey for just $8.88. These passive muffs have low profile shells engineered to stay out of the way when shouldering your weapon. The ergonomic headband keeps the muffs aligned, in their proper position. Purchasers report the soft leatherette ear seals are surprisingly comfortable. These muffs provide a pretty high NRR considering the low profile design. And the price, just $8.88 on sale, is hard to beat! NOTE: Other vendors have a more conservative 25 NRR for these type of muffs. That’s still quite good.

9. Amazon — Boosteady Pack of 1000 Patches, $8.99 – $13.99

BOOSTEADY Pack of 1000 Professional Square Gun Cleaning Patches

A clean gun is a happy gun and since patches are the core of any cleaning regimen why not grab some great patches for a great price? Amazon sells 1000-count packs of Boosteady Professional Cleaning Patches starting at just $8.99 for 1″ square patches — a great bargain for 1000. Now you won’t feel so bad running a few extra patches every time you clean just make sure you got the last bit of crud out. Boosteady patches are very highly rated by purchasers and come in 1″ square ($8.99), 2″ square ($11.99), and 2.5″ square ($13.99) sizes, inside a convenient box.

Permalink Bullets, Brass, Ammo, Handguns, Hot Deals, Optics No Comments »