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July 17th, 2025

2025 Nat’l Rimfire Sporter Event this Sunday — with E-Targets

cmp camp perry national rimfire sporter

The CMP’s hugely popular Rimfire Sporter event runs Sunday, July 20, 2025 at Camp Perry, Ohio. Prior to the Sunday match, on Saturday, July 19th, the CMP will host the Rimfire Check-In and a CMP Rimfire Clinic.

New Range Location Will Have E-Targets
Unlike past years, the 2025 National Rimfire Sporter match will be held on Camp Perry’s Petrarca Range — equipped with CMP eTargets. This should please the hundreds of Rimfire Sporter competitors. The Petrarca range features more conveniences, such as a covered firing line and adjacent parking. Moreover, the eTargets should improve the experience for competitors. Brian Williams, CMP Highpower Manager, explained: “The matches should run faster, without the need to hang targets and do the scoring.”

cmp camp perry national rimfire sporter

cmp camp perry national rimfire sporterE-Targets for Rimfire Sporter Match This Year
For the first time, this summer the CMP will utilize the electronic targets of Petrarca Range for the National Rimfire Sporter Match. Featuring Kongsberg Target System (KTS) technology, the system includes monitors at each firing point.

The eTargets will permit the Rimfire Sporter Match to run more smoothly and efficiently. Competitors won’t have to walk down-range between relays to change targets, and scores will be tracked and recorded instantly. Monitors placed alongside each competitor will instantly show shot placements during the match, while suspended displays above the firing line will allow spectators to follow along with each shot in real time.

cmp camp perry national rimfire sporter

Popular Match for Junior and Adult Competitors
The National Rimfire Sporter Match, one of the most well-attended events of the annual National Matches, is open to both adults and juniors of all experience levels. Using .22 caliber rifles at 25 and 50 yards, participants in the match traditionally chose from three separate classes: Open Sight (O), Telescope Sight (T) and Tactical Unlimited (TU). Due to high demand, the CMP has added an “M-class” for 2025 to give competitors the option to use U.S. military rimfire training rifles during competition. Competitors may enter in Single or Double Entry options and then select the rifle class(es) in which they will fire.

Firing is done at 25 and 50 yards in prone, sitting, and standing positions, in slow and rapid-fire modes. For each Class, awards are offered to High Juniors, High Seniors, and High Women as well as Overall Winners.

cmp camp perry national rimfire sporter

If there is a single CMP event at Camp Perry every summer that offers the highest level of shooter satisfaction, the most diverse group of competitors, and the lowest cost of entry, that would have to be the annual Rimfire Sporter Match. Shooters range in age from young juniors to seniors in their 70s and 80s. And persons with disabilities can compete as well, with Adaptive Shooting Programs for physically-challenged competitors.

Each year, the Rimfire Sporter Match attracts hundreds of shooters to Camp Perry. National Rimfire Sporter competitors can use affordable sporter rifles with either scopes or iron sights. All you need are a .22 LR rifle, a simple sling, and ammo. Rifles may be manually operated or semi-automatic, in four classes: the standard “O Class” for open-sighted rifles, “T-Class” for telescope-sighted rifles, the “TU Class” for Tactical and unlimited rifles, and the new “M-Class” for Military Rimfire Training Rifles.

Rimfire Sporter Equipment

Rimfire Sporter Course of Fire

cmp rimfire sporter camp perry competition

Competitors will complete slow fire prone, rapid fire prone, slow fire sitting or kneeling, rapid fire sitting or kneeling, slow fire standing, and rapid fire standing shot sequences. To learn more about the National Rimfire Sporter Match, CLICK HERE.

National Rimfire Sporter Match Camp Perry 2024

National Rimfire Sporter Match Camp Perry 2024

Learn more about the National Rimfire Sporter Match at TheCMP.org website.

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July 17th, 2025

Bullets Spinning Fast Enough? Use Twist Rate Stability Calculator

Berger twist rate calculator

Berger Twist-Rate Stability Calculator
Berger twist rate calculatorOn the Berger Bullets website you’ll find a handy Twist-Rate Stability Calculator that predicts your gyroscopic stability factor (SG) based on mulitiple variables: velocity, bullet length, bullet weight, barrel twist rate, ambient temperature, and altitude. This cool tool tells you if your chosen bullet will really stabilize in your barrel.


CLICK HERE to Go to TWIST RATE CALCULATOR PAGE »

How to Use Berger’s Twist Rate Calculator
Using the Twist Rate Calculator is simple. Just enter the bullet DIAMETER (e.g. .264), bullet WEIGHT (in grains), and bullet overall LENGTH (in inches). On its website, Berger conveniently provides this info for all its bullet types. For other brands, we suggest you weigh three examples of your chosen bullet, and also measure the length on three samples. Then use the average weight and length of the three. To calculate bullet stability, simply enter your bullet data (along with observed Muzzle Velocity, outside Temperature, and Altitude) and click “Calculate SG”. Try different twist rate numbers (and recalculate) until you get an SG value of 1.4 (or higher).

Gyroscopic Stability (SG) and Twist Rate
Berger’s Twist Rate Calculator provides a predicted stability value called “SG” (for “Gyroscopic Stability”). This indicates the Gyroscopic Stability applied to the bullet by spin. This number is derived from the basic equation: SG = (rigidity of the spinning mass)/(overturning aerodynamic torque).

Berger twist rate calculator

If you have an SG under 1.0, your bullet is predicted not to stabilize. If you have between 1.0 and 1.1 SG, your bullet may or may not stabilize. If you have an SG greater than 1.1, your bullet should stabilize under optimal conditions, but stabilization might not be adequate when temperature, altitude, or other variables are less-than-optimal. That’s why Berger normally recommends at least 1.5 SG to get out of the “Marginal Stability” zone.

In his book Applied Ballistics For Long-Range Shooting (3rd Ed.), Bryan Litz (Berger Ballistician) recommends at least a 1.4 SG rating when selecting a barrel twist for a particular bullet. This gives you a safety margin for shooting under various conditions, such as higher or lower altitudes or temperatures.

Story idea from EdLongrange. We welcome reader submissions.
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July 17th, 2025

Watch Amazing 1 Million Frames-Per-Second Bullet Impact Video

werner mehl kurzzeit.com high speed slow motion bullet video

Want to see a bullet hit a target in ultra-slow motion? Watch this video to witness some amazing things — such as a bullet jacket peeling back like a banana-skin (at time-mark 7:30). A while back, Germany’s Werner Mehl produced this remarkable 10-minute video for the NSSF SHOT Show. This video has has been watched over 15.6 million times, making it one of the most popular shooting-related videos in history. Employing cameras recording at up to 1,000,000 (one million) frames per second, Mehl’s bullet flight video has been called “astounding” and “mesmerizing”. If you haven’t seen it yet, sit back and enjoy!

Watch This Video! It’s Really Something Special…

This remarkable 1 million Frame Per Second video by Werner has over 15,600,000 YouTube Views with 77,000+ likes. It is one of the best high-speed bullet impact videos ever created.

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