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April 29th, 2023

Saturday at the Movies: AR-Platform Varmint Rifles

.17 wsm 20 practical ar-15 ar ar15 varmint rimfire

With spring soon changing to summer, we are in peak varmint season in many parts of the country. In an area with a high number of critters, a semi-auto varmint rifle is a good choice. You get quick follow-up shots, with reliable 20-rd and 30-rd magazines.

For this Saturday at the Movies Showcase we feature a variety of semi-auto, AR-platform rifles chambered for efficient, high-velocity varmint ammo. Cartridges include: .17 WSM, .17 Remington, .20 Practical, .204 Ruger, .22 Grendel, .223 Rem, and 6mm ARC. We conclude with a video that reviews a variety of lead-free .223 Rem ammo types.

Rock Chuck Hunting in Eastern Oregon

This video has some great backcountry footage. The host nails a number of rockchucks with his .223 Rem-chambered AR-15. The shooter says that the default AR-15 cartridge works great for varmints: “The .223 Remington becomes a rockchuck hunter’s friend with the right load: Nosler 40gr Ballistic Tip loaded over a stuffed case of H335 powder. This achieves 3800 FPS with excellent accuracy.”

.17 Remington AR-15 — Small Bullet, Ultra-High Velocity

The .17 Remington wildcat is based on the .223 Remington case necked down to .172″, with the shoulder moved back. High muzzle velocity (4000+ FPS), flat trajectory, and very low recoil are the .17 Remington’s primary attributes. It has a maximum effective range of about 440 yards on prairie dog-sized animals, but the low BCs of the small .17-cal bullets makes them quite susceptible to crosswinds at such distances.

.17 wsm 20 practical ar-15 ar ar15 varmint rimfire

This video was created in spring 2022, just in time for Rockchuck and Thermal Coyote hunts. The host noted: “This was my first experience with the .17 Remington, but I was not unaware of its history and steady popularity among varmint and predator hunters. Although finding an available and affordable .17 Remington bolt-action rifle is nearly impossible nowadays, building one in an AR-15 was simple and straight-forward.” The video has full description of all the components for the build. The .17 Rem is fast — the 25gr bullet runs 3777 FPS from an 18″ barrel (see 01:42 time-mark). READ Full Story.

.17 WSM Rimfire in Franklin Armory F17-L

What’s the ultimate rimfire varmint rifle? An AR chambered for the .17 WSM could be the answer. Eric Mayer of states: “The Franklin Armory F17-L in .17 Winchester Super Magnum (WSM) has a lot of firsts. It is the first semi-automatic rifle in .17 WSM now available to the general public. It is the first gas-piston system, AR-15 rimfire rifle built in partnership between Franklin Armory and Osprey Defense.”

Eric has used the .17 WSM AR shooting ground squirrels, rock squirrels, prairie dogs, and rabbits. Eric notes: “The report of the .17 WSM is nowhere near as loud as most of the centerfire [varmint] cartridges. I found that when I shot the FA-17, it did not cause the other ground squirrels… to run for cover. The lack of recoil … allowed me to see right where I hit [and] if I happened to miss, [low recoil] made for quick corrections for wind, or distance.” READ Full Report

.17 wsm varmint rimfire
The .17 WSM is a much larger, more powerful round than the .17 HMR. See the size difference above.

Eric Mayer created his own custom .17 WSM AR-15 varmint rifle, built with a Franklin Armory F17-V4 Upper, Aero Precision Lower, and Magpul stock. This was used in California and Arizona. READ Full Story.

.20 Practical — Fast, Accurate, Easy to Form

The .20 Practical cartridge is simply a .223 Rem necked down to .20 caliber. This is a great choice for prairie dogs — and probably our favorite wildcat for the AR-15. Just neck down your .223 Rem brass, fit a .20-Cal barrel and you’re good to go. Robert Whitley notes the the .20 Practical “is a perfect cartridge for varmint hunting and general shooting — very accurate and fast! It functions 100% out of an AR-15.”

The .20 Practical offers some notable advantages for high-volume varmint shooters. The .20 Practical delivers very high velocity with very low recoil while still providing outstanding accuracy. The .20 Practical is great option for folks who favor “fast and light” — smaller, lower-mass bullets traveling at very high velocities. This little cartridge can launch 40-grainers at over 3900 FPS, and 32-grainers even faster. This makes the .20 Practical a great choice for an AR-based varmint rifle.

20 Practical.20 Practical Ultimate AR Varminter
A decade ago created a .20 Practical AR15 Ultimate Varminter with a custom 20-caliber upper from Robert Whitley of AR-X Enterprises, LLC. That project rifle was ultra-accurate — every 5-shot group out of the gun was less than the size of a dime. That gun was auctioned off, but Robert Whitley continues to produce custom 20 Practical AR-15 uppers.

You make .20 Practical cases by simply necking down .223 Rem brass to .20 caliber. You can start with standard .223 Rem brass and even load with standard .223 Rem dies. Just swap in a smaller expander and use smaller neck bushings.

Prairie Dog Hunt with .204 Ruger AR — Watch The P-Dogs Fly

The video was created during a 2018 prairie dog safari. It has stunning footage of hits on P-Dogs at multiple distances. You can see over FIFTY hits with some amazing P-Dog aerials. Watch the first flyin’ dog at 00:20 time-mark and there’s a truly spectacular gut-busting hit at 3:13. That shows the potency of a high-speed .20-cal projectile. The shooter was using a custom-built AR-15 chambered in a .204 Ruger. That cartridge was driving 35gr Berger hollow point bullets at a stunning 4050 FPS! The rifle was fitted with a Dakota silencer suppressor and many other custom components. If you’ve never tried prairie dog hunting, watch this video start to finish and you may be hooked.

6mm ARC AR-15 Varmint Rig

This video examines the 6mm ARC cartridge from a varmint hunter’s perspective. Created by Hornady, the 6mm ARC was designed for target shooting and medium-sized game both in bolt guns and Modern Sporting Rifles. Hornady states: “The 6mm ARC … fits in an AR-15-pattern action, functions reliably out of standard-capacity 24- or 17-round magazines. It delivers substantially better ballistics than the .223 Rem[.]” This video examines how the 6mm ARC performs in an AR-15 for varmint and predator hunting. The host reviews available factory varmint loads. The video also examines reloading components for the 6mm ARC — brass and bullets. CLICK HERE for full article.

Cottontail Rabbit Hunting with Suppressed .204 Ruger AR-15

As a varmint hunting tool, the .204 Ruger in an AR-15 is a versatile, worthy cartridge/rifle combo for the job. This video covers a cottontail rabbit hunt. The host states that “We were contacted by a farmer who was being slammed with cottontail rabbits eating out huge portions of his alfalfa fields.” This suppressed .204 Ruger AR-15 proved seriously effective on the rabbits, driving high-velocity rounds with impressive accuracy. See more details on the website.

.22 Grendel-Chambered AR-15 — Impressive Velocities

The .22 Grendel is an extremely accurate and efficient cartridge based on the 6.5 Grendel necked down to .22 caliber. The case can drive 55gr varmint bullets at high velocities — over 3500 FPS. With a faster-twist barrel you can load up to 90gr bullets at 2500 FPS. The tester achieved velocities close to a 22-250. The short, fat case fits in AR-15 magazines, but may not feed as reliably during rapid fire. The tester did experience one double-feed.

Lead-Free Ammo Offerings Tested in .223 Rem AR-15

Some states — such as California — prohibit hunting with bullets that contain lead. If you plan to hunt in an area with such restrictions, you’ll need to find a lead-free substitute. Thankfully a number of manufacturers produce ammo with solid brass projectiles or other lead-free bullet designs. This video reviews .223 Remington no-lead ammunition from Cor-Bon, Hornady, Nosler and Winchester. These ammo types were tested in a AR-15 varmint rifle, used in a coyote hunt featured at the end of the video. SEE Full Story on

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April 29th, 2023

Rimfire Revolution — Good Resource for NRL22 Competitors

17 HM2 Mach 2 rimfire

Do you shoot NRL22 matches, or are you thinking of getting started in that rapidly-growing discipline? Then grab a copy of Rimfire Revolution: A Complete Guide to Modern .22 Rifles. Released in summer 2021, this book covers rimfire rifles and shooting disciplines. Order the print version for $24.25 on Amazon. IMPORTANT: For the best price, on the Amazon landing page, select the New from $24.25 link below the “Paperback” icon. Or get a digital Kindle Edition for $17.99 from Amazon.

This Gun Digest book has become a “go-to” resource for NRL22 and PRS Rimfire shooters. Key topics included in this 2021 Edition full-color Gun Digest book include: rimfire semi-autos and how they work; bolt-action accuracy; match shooting skills; DIY precision gunsmithing; hunting with rimfires; and the future of the rimfire market.

With the growth of rimfire tactical competition, the .22-Caliber rimfire rifle is more popular than ever. Every major gun manufacturer has brought at least one new .22 LR rimfire rifle to the market in the last two years. Gun Digest’s Rimfire Revolution has extensive coverage of new models from major manufacturers.

The .22 Long Rifle (.22 LR) is the planet’s most popular ammunition type and firearm chambering. The .22 LR is used in the Olympics by 3P marksmen, but it also serves benchrest competitors, NRL22 shooters, backyard plinkers, small-game hunters, and tactical trainers. With the expansion of NRL22 matches (and the PRS equivalent), the humble .22 LR is undergoing a major resurgence in the USA. And with centerfire reloading components being so costly and difficult to find, many folks are shooting less centerfire, but way more rimfire.

This 272-page book also covers .17-caliber rimfire cartridges: 17 HM2 (Mach 2), 17 HMR, and 17 WSM. These are all excellent varmint rounds, with the 17 WSM effective out to 250 yards. The 17 HM2 will run in a normal .22 LR action and feed from standard .22 LR magazines. So, for most rifles, all you need to do a .22 LR to 17 HM2 conversion is a barrel switch. That gives your rimfire rig twice the versatility. Shoot .22s and .17s with the same gun.

17 HM2 Mach 2 rimfire

NRL22 — Challenging Practical Competition with .22 LR Rifles

The USA has seen a big growth in rimfire tactical matches over the last five years. Right now there are probably ten times as many rimfire tactical matches as sanctioned PRS and NRL centerfire matches. The reason is simple — rimfire ammo is much less costly, and clubs can run challenging rimfire tactical matches at nearly any outdoor gun range that allows shooting out to 200+ yards.

NRL22 Competition — Tactical Rimfire Matches
The NRL22 match format is a great shooting discipline. NRL22 offers a high fun factor at relatively low cost. You don’t have to reload match ammo. A couple of 50-round boxes of .22 LR ammo will get you through the match. While some people bring lots of gear to matches, that’s by choice and not by necessity. You can keep it simple and still be competitive (and win).

jonathan Ocab v-22 vudoo action MPA BA Comp chassis rimfire tactical NRL22 sunday gunday Center-X 6mm creedmoor PRS

Tips for NRL22 Competitors
by Jonathan Ocab
I am a match director at my gun club and run our local NRL22 matches. People often ask me for tips for competing in NRL22. First, I recommend getting the course of fire for the month in advance and practicing those stages at the range. Here are other specific tips that should help NRL22 competitors improve their gun-handling and match results.

1. Dry Fire Practice — If you are not able to do live fire practice at the range, I encourage shooters to practice their shooting positions at home via dry fire. Setup props or barricades with pasters or other faux targets on a wall in the garage or inside the house and run through each stage.

2. Scope Magnification Level — The most common issue I see with newer shooters in NRL22 is the tendency to maximize their scope magnification. The timer will start, and the shooter gets into position on a target, but the scope is set to 15x or higher and the shooter can’t find the target. The shooter lowers the magnification, locates the target, and then increases the magnification again, takes the shot, transitions to another target, and repeats the process of decreasing magnification, locating target, etc. Novice NRL22 shooters should try using the mid-range magnification. Try shooting 7x-12x and learn to balance field of view and target image.

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