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January 13th, 2024

Saturday Movies: Six Valuable Videos from Keith Glasscock

Winning in Wind Keith Glasscock video showcase reloading barrel ES SD Accuracy

Keith Glasscock is one of America’s greatest F-Class shooters, as well as a highly respected wind coach. A High Master, Keith finished second overall at the 2021 NRA F-Class Long Range Championship in F-Open division. He also finished second at the 2020 F-Open Nationals, and second at the 2019 F-Open Nationals. His consistency is unrivaled, which means he definitely knows the secrets of competition shooting and loading ultra-accurate ammo. Recently Keith has started PRS/NRL competition, bringing his shooting skills to those popular tactical disciplines.

Keith has a great YouTube Channel with new content every week. On Keith’s Winning in the Wind channel, Keith offers 190+ informative videos on a wide range of topics including wind reading, reloading, component selection, load development, and training. For today’s Video Showcase, we offer four of our favorite Keith Glasscock videos. Each video has important points that can benefit any competitive rifle shooter, whether you shoot in local 100-yard fun matches or compete at the National Level in F-Class, LR Benchrest, Palma, or High Power.

How to Reduce Extreme Spread (ES) and Standard Deviation (SD)

Having minimal Extreme Spread (ES) does not necessarily guaranteed optimal accuracy. Some PPC shooters accept a relatively high ES for a load that shoots best at 100/200 yards. But very low ES — i.e. having bullets all exit the muzzle at virtually the same FPS speed — can definitely reduce vertical dispersion at long range (assuming consistent bullet BCs). In this video, Keith talks about various methods to reduce ES and SD. This can include seating depth, primer choice, powder charge weight, brass prep, bullet seating methods and more. Our tip is to have good smoothly-chamfered case mouths, use a quality arbor press with seating force measurement, measure powder loads very precisely, and use the highest-quality brass you can find.

Keith notes that, to achieve the lowest ES, you need to look at multiple processes, including precision powder weighing, careful seating, brass annealing, and primer selection. Another factor is bullet selection. Not all bullets of the same nominal caliber and weight class have exactly the same bullet diameter or shape. Sometimes you can get better accuracy AND lower ES by trying a different brand of bullet. We have found bullet diameters, of the same stated caliber, can vary by up to .0008″ (eight ten-thousandths). Some barrels like the fatter bullets, while other barrels may favor the skinny bullets.

Top 10 Methods to Improve Your Shooting Accuracy

To shoot top scores, you need great skills and great hardware. This video covers 10 things that can improve accuracy, starting with the most important. The #1 item, notes Keith, is rifle shooting skill — you need to be able to hold on target properly and run the rifle consistently shot after shot. The second most important thing is an accurate rifle — you need a rifle with an excellent barrel, quality components, and top-tier inherent accuracy. Third, you need very accurate ammo, and this means you need to perfect your reloading skills. You need precise powder measurement and good, consistent bullet seating. Fourth in the list is related to ammo — you need the ability to do effective load development to pick the best load for your particular barrel. Number 5 is the “right bullet”. You need a high-quality, ultra-consistent bullet that is a good match for your particular barrel and discipline. Watch the video for the other five items.

Balance Beam vs. Advanced Electronic Scale with AutoTricker

Here Keith evaluates the performance of ammo loaded with a conventional balance beam scale vs. ammo loaded with a precision, electronic force-restoration scale fitted with an AutoTrickler V4. It turns out that the balance-beam loaded ammo was actually quite accurate and consistent. Keith concluded that balance-beam ammo may well be good enough for PRS/NRL competition. However for other disciplines, such as benchrest and F-Class, Keith suggest it may be worth the investment. But the key factor is also time — with the precision scale and AutoTrickler Keith can load large quantities of competition-grade ammo much, much faster. Keith points out he puts value on his time, reminding us that, indeed, “time is money”.

Barrel Break-In Procedure for Match Barrels

In this video, Keith explains his procedure for breaking-in his match barrels. He starts by bore-scoping the barrel and cleaning it. If he finds some burrs he may use some JB Bore Paste, a patch, and a worn brush and “give that throat a little scrub” (See 1:30 time-mark). He used different stroke lengths to avoid putting a “step” in the throat. When he’s satisfied he goes to the range. He fires the first five rounds, then cleans. He then fires quite a few rounds before cleaning the barrel again and beginning load development (See 8:25 time-mark).

Bullet Sorting Methodology — Effective Methods

Bullet sorting can improve scores and accuracy, particularly for long-range competitions. There are various methods for sorting — weight, base-to-ogive measurement, bearing surface length, tip condition, and max diameter. In this video Keith explains the pros and cons of various methods. The best choice can also depend on the brand, design, and caliber of each bullet. Some bullets show significant base to ogive variance, other bullets (such as Lapua Scenars), have been extremely consistent. Overall, if you are a long-range competitor, is it probably useful to bullet sort, and you can use outliers for fouling shots.

Tripod Options for PRS/NRL Competition

Over the past two seasons, Keith has added PRS/NRL shooting to his competition resume. Along with his stellar F-Class skills, Keith now has considerable experience with tactical competitions. And he’s learned that having a good tripod will make a difference over the course of a match. In this video, Keith looks at various tripod options and explains the ways you can use a tripod for PRS/NRL centerfire and rimfire competition. While the tripod can obviously be used to support the rifle, it can also be used for various other functions, as shown in the video.

Winning in Wind Keith Glasscock video showcase reloading barrel ES SD Accuracy

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January 13th, 2024

Modern Barrel Honing Technology — High-Tech at Work

Sunnen honing barrel hone CNC computer honer machine Pac-nor

Some custom barrel makers are now honing barrels (after drilling) to improve bore diameter uniformity, smooth the interior finish, and reduce barrel lapping times. For years, large-scale manufacturers of hammer-forged barrels have employed honing. Now the process is being used by smaller, “boutique” barrel-makers. This article explains how and why barrel honing is done. Take the time to watch the video. For anyone with an interest in barrel-making, this video from Sunnen Products Co. is an eye-opener.

Barrel Honing Process Demonstrated (Worth Watching!):

Barrel Bore honing cut-rifled rifling hammer forging accurateshooter.com

For custom barrel makers, honing is a time-saver and cost cutter. A few minutes on a honing machine can cut lapping times in half, leaving a cross-hatched surface finish in single or low double-digit Ra. Honing is the same process used to make diesel fuel injectors with bore roundness and straightness controlled to fractions of a micron (<0.000040"), with surface finish Ra ≤0.15 µm (6 µin).

A key manufacturing process used for hammer-forged barrels is now getting attention from the makers of custom button-rifled barrels. This process is precision bore-honing. Honing produces a high-quality bore surface fast, which is critical to hammer forging. (Why is honing so important with hammer forging? Surface finish is the one feature of the barrel that cannot be controlled in hammer forging. Surface imperfections in a barrel blank tend to be amplified as the blank is formed on the rifling mandrel. And if the bore is chromed afterwards, imperfections in the surface finish become even more obvious.)

Honing dramatically improves bore diameter size uniformity and accuracy, surface finish and roundness throughout the length of the barrel. It can certainly be used in place of a pre-rifling lap. The chief difference between a lapped and honed bore is the direction of the finish lines in the bore. Honing leaves fine spiraling crosshatch lines, while a lap leaves lines going longitudinally in the bore. After rifling the manufacturer can remove the crosshatch finish with a quick lap if desired. Honing is fast, accurate, and can be automated. Its surface quality and geometry can duplicate lapping, except for the longitudinal lines of the lapped finish.

In 2015 Frank Green of Bartlein Barrels told us: “We worked with Sunnen and we did all the initial testing on the prototype machine for them. The machine works great! We ordered and received … a new manufactured machine with the changes we wanted on it and [subsequently] ordered a second one.”

Pac-Nor PacNor Barreling honing hone Sunnen lapping barrel
The Sunnen hone secures the barrel blank in a 3-jaw chuck, with honing oil pumped into one end while the tool works from the opposite end. Sunnen’s specialized Long Bore Tool uses metal-bond diamond or CBN superabrasives to quickly remove reamer marks, waviness, tight spots and other imperfections left by upstream processes.

Sunnen states that: “Honing is an ideal replacement for hand-lapping barrel blanks before rifling. It quickly removes reamer scratches and surface waviness without labor-intensive hand lapping. By producing a consistent bore diameter (±0.0001″ or less), parallelism, roundness and surface finish end to end, honing yields more consistent performance from rifling buttons and cutters, resulting in a constant groove depth. The ideal bore geometry reduces distortion of the bullet shape.”

Barrel Bore honing cut-rifled rifling hammer forging accurateshooter.com

Computer-Controlled Bore-Honing
Honing can be done with great precision through the use of advanced, computer-controlled honing machines. Sunnen Products Company offers an advanced machine for .17 to .50-caliber barrels (see control panel below). The spindles on this machine can correct bore size imperfections so small only an air gauge can measure them. The consistency this allows improves bore uniformity, which, in turn, produces more accurate barrels for the precision market.

Barrel Bore honing cut-rifled rifling hammer forging accurateshooter.com

Barrel Bore honing cut-rifled rifling hammer forging accurateshooter.com

Sunnen Products Company is the world’s largest vertically-integrated manufacturer of honing systems, tooling, abrasives, coolants, and gauging for precision bore-sizing and finishing. Sunnen’s customers include manufacturers of diesel and gas engines, aerospace components, hydraulic components, oil field equipment, and gun/cannon barrels. Sunnen employs more than 600 people worldwide.

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January 13th, 2024

Great 3D Animation Shows Pistol Ammo Firing Sequence

GECO Ruag Ammotec RWS ammo 3D animation video

Here’s a very cool 3D Animation showing pistol rounds being fired. Computer-generated graphics provide a look inside the cartridge at the moment of ignition as the primer fires and the flame front moves through the ignited powder. It’s really kind of mesmerizing. If you’ve every wondered just what happens inside your cartridges the moment that firing pin strikes, then watch this video…

Watch Video to See Handgun Ammo Being Chambered and Fired:

Mute Enabled — Click Speaker Icon to Hear Audio. Firing Sequence Starts at 1:28.

GECO Ruag Ammotec RWS ammo 3D animation videoThis animated video from German ammo-maker GECO (part of the Swiss RUAG group of companies) reveals the inside of a pistol cartridge, showing jacket, lead core, case, powder and primer. Employing advanced 3D rendering and computer graphics, the video shows an X-ray view of ammo being loaded in a handgun, feeding from a magazine.

Then it really gets interesting. At 1:28 – 1:50 you’ll see the firing pin strike the primer cup, the primer’s hot jet streaming through the flash-hole, and the powder igniting. Finally you can see the bullet as it moves down the barrel and spins its way to a target. This is a very nicely-produced video. If you’ve ever wondered what happens inside a cartridge when you pull the trigger, this video shows all. They say “a picture’s worth a thousand words”… well a 3D video is even better.

GECO Ruag Ammotec RWS ammo 3D animation video

GECO Ruag Ammotec RWS ammo 3D animation video

GECO Ruag Ammotec RWS ammo 3D animation video

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