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January 21st, 2023

Saturday Movies: Rimfire (Smallbore) F-Class and Fun Matches

Camp Wa-Ke-De indiana 2018 smallbore F-Class Jim Murphy
Anschutz .22 LR rifle set up for F-Class competition. Photo courtesy Sportschieben Blog.

Here’s a fun new discipline that will grow in years ahead — Smallbore F-Class with .22 LR rimfire rifles. Rest-supported prone rimfire matches have been held around the world for quite some time, but only a few years ago was the discipline officially codified in the NRA Smallbore Rulebook. And the first-ever Smallbore F-Class National Championship was held in July 2018 in conjunction with the Smallbore Nationals at Camp Wa-Ke’-De in Bristol, Indiana. The Nationals involved multiple days of prone shooting at 50 meters and 100 yards. For more information read Hap Rocketto’s Shooting Sports USA Smallbore F-Class Report.

Camp Wa-Ke-De indiana 2018 smallbore F-Class Jim Murphy
National Championship photo from Shooting Sports USA.

Smallbore F-Class competitors may shoot F-TR style with a bipod, or use a front rest. In the above photo from the inaugural NRA National Championship you can see a shooter with SEB Coaxial Rest at top, with a competitor using a low-profile bipod at bottom. Note the extended handle used to adjust bipod elevation. This is not a coaxial joystick, but rather a long handle attached to the mariner wheel.

Smallbore F-Class — The Future Looks Bright
With the high cost of centerfire ammunition, and the limited number of 1000-yard (or even 600-yard) ranges, we can envision that Rimfire F-Class will become a popular event at ranges across the country. Clubs don’t even need benches — just a 100-yard target bay and flat ground for the shooters. You can start with an inexpensive rimfire rig and Harris bipod. Then work up from there. Here is a custom rimfire F-TR style rig that belongs to F-Class ace and past centerfire F-TR National Champion James Crofts.

Camp Wa-Ke-De indiana 2018 smallbore F-Class Jim Murphy

Rimfire F-Class and Fun Prone Matches with Front Rest or Bipods

Rimfire F-Class offers the fun of centerfire shooting at a much lower cost. Shooting is done prone with either a front rest or a bipod. You can shoot a relatively inexpensive rifle such as a CZ 457 MTR, or a custom build that has the same design features, weight, and ergonomics as a full-size F-TR or F-Open rifle. The choice is yours. We like shooting smallbore F-Class, because you can find decent .22 LR ammo for just $0.20 per round. By contrast, you’ll probably spend at least $1.20 per round for F-Class centerfire ammo (counting bullet, powder, primer, and part of the brass cost).

Top-Tier Vudoo V22-S Target Rifle for Rimfire F-Class


Camp Wa-Ke-De indiana 2018 smallbore F-Class Jim Murphy

Vudoo Gun Works now offers an impressive .22 LR Single Shot Target Rifle that should prove ideal for rimfire F-Class (Open division). It features the new V22-S single-shot action, McMillan stock, and Flavio Fare BR-VS trigger.

Rimfire F-Class in the Canary Islands

This video comes from the Canary Islands, part of Spain. The voice-over is in Spanish but there are English sub-titles. The host explains: “In this video we summarize the main characteristics of this [shooting sport] that is practiced at 50 meters, 100 meters, and 200 meters with your .22 LR. Learn how to prepare your rimfire carbine and learn how to score your own targets by following our simple explanations. In another video we will delve into shooting techniques, shooting accessories and field accessories.”

Here is another rimfire F-Class video from the Canary Islands. This shows how the sport can be done with a variety of rimfire rifle types, even including a .22 LR AR clone. Some shooters are using a wide-base bipod, others are using normal Harris-type bipods, while others are using a large, benchrest-style front rest.

Rimfire F-Class-Style Local Fun Match in Oregon

In this video, F-Class John shoots an F-Class-style local fun match in Oregon. He is using a .22 LR rimfire rifle that has a full-size stock very similar to his custom F-Open centerfire rifles. This allows him to easily switch from centerfire F-Class to rimfire prone shooting with front rest and rear bag. The local fun match rules are a little different than an official F-Class match, but the shooting skills required are the same. Shooting this kind of local rimfire match allows John to keep his F-Class skills at a high level at a fraction of the cost of shooting centerfire F-Open.

Rimfire F-Class in Russia

NOTE: This video was filmed in Russia. The dialog is in Russian (without English subtitles), but it is still interesting to watch. Shooting F-Class with .22 LR ammo has become popular in Russia and other parts of Europe. You can have fun on a relatively short (200m) range with low-cost ammo.

Smallbore F-Class Course of Fire
The Smallbore F-Class Nationals was completed on paper targets at 50 yards and 100 yards. According to Shooting Sports USA: “The tournament ran during the any sight and metric phases of the 2018 NRA National Smallbore Rifle Championships, featuring a daily course of fire which mirrored the sling shooters, 40 shots at 50 meters on the A-50 target, a Metric Dewar, followed by 40 shots at 100 yards on the A-33 target. Although the international targets were shot throughout, the first two days were titled ‘conventional’ and the last two ‘metric’.”

The specifics of the match such as rifle requirements, rests, and sights may be found in the Provisional Smallbore Rifle F-Class Rules (Section 23), found on page 65 of the current NRA Smallbore Rifle rulebook. Any rules not covered in Section 23 will [reference] the normal rules of Sections 1 through 22.

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January 21st, 2023

Sierra Ballistics Resources — 60+ Authoritative Articles for FREE

Sierra Bullets Ballistics Resources

Need some informative reading material for winter days? Here’s a vast resource available free from Sierra Bullets. Here are links to over 60 articles with information on bullets, ballistic coefficients, wind drift, up/down angles, temperature effects, tailwind effects and much more. Most of these resources come from the respected Sierra Reloading Manuals, 4th and 5th Editions. There are enough articles to read one per week for a year!

Major Ballistics Reference Articles
The Ballistic Coefficient by William T. McDonald & Ted C. Almgren (Adobe .PDF)
Deflections and Drift of a Bullet in a Crosswind by William T. McDonald (Adobe .PDF)
Inclined Fire by William T. McDonald

Table of Exterior Ballistic Coefficients
(5th Edition Reloading Manual)

Rifle
Handgun
.22 Rimfire

Exterior Ballistic Tables
(4th Edition Reloading Manual)

Rifle Tables – Select by Bullet
Handgun Tables – Select by Bullet
Silhouette Tables – Select by Bullet

5th Edition Manual Exterior Ballistics Section
Section 1.0 Introduction
Section 2-2.1 The Ballistic Coefficient Explained
Section 2.2 Bigger Is Not Always Better
Section 2.3 How the Ballistic Coefficient is Measured
Section 2.3.1.1 Measurement Procedure
Section 2.3.1.2 Important Precautions and Points to Consider
Section 2.3.2 Initial Velocity and Time of Flight Method
Section 2.3.3 Doppler Radar Method
Section 2.4 Lessons Learned from Ballistic Coefficient Testing
Section 2.5 Examples of Ballistic Coefficient Measurements
Section 3.0 Exterior Ballistic Effects on Bullet Flight
Section 3.1 Effects of Altitude and Atmospheric Conditions
Section 3.2 Effects of Wind
Section 3.3 Effects of Shooting Uphill or Downhill
Section 3.4-3.4.1 Trajectory Considerations for Sighting in a Gun
Section 3.4.2 Determining Zero Range from Firing Test Results
Section 3.4.3 Sighting in for a Change in Shooting Location
Section 3.5 Point Blank Range
Section 3.6 Maximum Horizontal Range of a Gun
Section 3.7 Maximum Height of Fire of a Gun
Section 4.0 Six Degree of Freedom Effects on Bullet Flight
Section 4.1 Basic Physical Concepts
Section 4.2 Yaw of Repose and Resulting Crossrange Deflection
Section 4.3 Turning of a Bullet to Follow a Crosswind and Resulting Deflections
Section 4.4 Turning of a Bullet to Follow a Vertical Wind and Resulting Deflections
Section 5.0 Trajectory Tables
Section 6.0 Sierra’s Infinity Exterior Ballistics Software

4th Edition Manual Exterior Ballistics Section
Section 2.0 Introduction
Section 3.0 Historical Summary
Section 4.0 The Ballistic Coefficient
Section 4.1 Basic Definitions
Section 4.2 Ballistic Coefficients Effects on Bullet Trajectories
Section 4.3 How the Ballistic Coefficient is Measured by Firing Tests
Section 4.4 Lessons Learned From Ballistic Coefficient Measurements
Section 4.5 Ballistic Coefficient Variations with Muzzle Velocity near the Speed of Sound
Section 4.6 Ballistic Coefficient Dependence on Coning Motion
Section 5.0 Exterior Ballistics Topics
Section 5.1 Effects of Altitude and Atmospheric Conditions
Section 5.2 Effects of Altitude and Uphill/Downhill Shooting
Section 5.3 Wind Effects
Section 5.3.1 Headwinds and Tailwinds
Section 5.3.2 Crosswinds
Section 5.3.3 Winds from Any Direction
Section 5.4 Changing the Zero Range
Section 5.5 Point Blank Range
Section 5.6 Muzzle Velocity Dependence on Cartridge Temperature
Section 6.0 Equations of Bullet Flight
Section 6.1 Differential Equations of Bullet Motion
Section 6.2 Drag Force and the Drag Function
Section 6.3/Section 6.3.1 Siacci’s Method/The Change of Independent Variables
Section 6.3.2 The Assumption
Section 6.4 Mayevski’s Analytical Form of the Drag Model
Section 6.5 Closed-Form Solutions for Trajectory Parameters
Section 6.6 Other Useful Equations
Section 6.6.1 References

Sierra Bullets Ballistics Resources

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January 21st, 2023

Bloody Disaster — Loading Pistol Powder in Rifle Case

Varget Kaboom TiteGroup Hand injury reloading fingers accident

This is a grim tale. A man almost lost the use of his right hand, and did suffer terrible injuries to his fingers. All because he picked the wrong bottle of powder off the shelf. We have run this story before, and we will continue to run it every year, as a caution to our readers. This mistake is easy to make, but the consequences can be dire. Always, always double-check your powder labels before you start the hand-loading process. If you don’t, you may not have a hand to load with next time…

Similar Labels, Disasterous Consequences
The shooter, Denny K., was assembling some rounds for his brand new 7mm-08 Savage hunting rifle. He thought he was loading with Hodgdon Varget. Instead he had filled his powder measure with Hodgdon TiteGroup, a fast-burning pistol powder. The labels are similar, so the mistake is understandable. But the results were devastating. Here’s what 41 grains of TiteGroup can do in a 7mm-08:

Varget Kaboom TiteGroup Hand injury reloading fingers accident

Posting on the Firing Line, in a thread entitled “Lucky to Be Alive”, Denny writes:

“This is the hardest post to post. I know if I had read it a week ago my comment would have been: ‘You have no business reloading’. I had everything perfect, except pouring the wrong powder in the powder measure. I type this slowly with my left hand, embarrassed but … possibly saving someone else a tragedy or, like me, a long drive to the Emergency Room and surgery to save my finger.”

CLICK HERE for bigger, more graphic photo of injury.
Varget Kaboom TiteGroup Hand injury reloading fingers accident

The Still-Sealed Bottle of Varget
Denny did not initially comprehend exactly why the kaboom happened. He thought maybe his new Savage rifle was at fault. Then, on his return home, he discovered something…

Denny wrote: “The seven-hour period it took to go to ER, transport to Trauma Center and surgery made me think it was a Savage rifle issue. Brand new rifle, new brass, triple-checked loading data. The next day I was humbled when I realized the Varget powder was still sealed.

I knew what powder to use. I thought [Varget] was what I used. Not until the following day did I realize the Varget was still sealed.”

At that point, Denny realized what caused the accident — “operator error”. He knew he had to warn others about using the wrong powder: “I knew I needed to share my mistake, even though it is embarrassing, just to remind people. I’ve been reloading for 30 years…”

Editor’s Comment: Denny was not a novice reloader. His experience demonstrates that this kind of mistake can be made by any hand-loader, even one with decades of experience. Be safe guys, take your time when you load your ammo. Remove powders from measures after your loading sessions (pistol powders can look very similar to rifle powders). And by all means CHECK the LABEL on the jug. As the TiteGroup label says: “A little goes a long way.”

It’s not a bad idea to separate your pistol powders from your rifle powders, or perhaps even load for pistol in a separate part of your workshop.

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