Over the past 18 months, popular ammo types, such as .223 Rem and 9mm, have been hard to find at reasonable prices. The high cost of .223 Rem centerfire ammo has driven more folks to shooting .22 LR rimfire ammo, both for fun and practice. This Sunday we look at a smart solution that allows you to shoot .22 LR ammo from your existing .223/5.56 AR-15 platform rifle. This is great because it allows low-cost training with no change in rifle balance, ergonomics, and/or optics.
The CMMG Bravo .22 LR Conversion Kit provides a replacement bolt/bolt carrier along with three 25-round magazines with special .22 LR-fitted followers and ammo slots. This allows you to shoot rimfire ammo from any AR-15 chambered for the .223 Rem (5.56×45). The CMMG Bravo has an integrated extension that fits into your current chamber. The rimfire bullet passes through this extension and then enters the barrel.
The CMMG Bravo conversion Kit comes with blowback-operated .22 LR bolt carrier, rubber protector for bolt carrier tip, and three 25-round polymer magazines. To use, simply replace the rifle’s .223 Rem bolt and carrier with the Bravo .22 LR conversion unit and load up the included magazine(s) with rimfire ammo.
To use the CMMG Kit, simply remove the centerfire bolt/bolt carrier, and replace it with the CMMG silver colored bolt shown above. CMMG states: “For best performance use a round-style hammer as notched hammers can cause function issues.” Testers have stated that high-velocity .22 LR ammo works best, and CMMG notes that “36gr plated-nose bullets have proven to be the best choice for function.” The copper-plated bullets help reduce fouling.
Ultimate Reloader Tests CMMG .22 LR Conversion Kit
Our friend Gavin Gear of UltimateReloader.com recently tested the CMMG .22 LR AR Conversion Kit. He observed that installation was very straight-forward and the CMMG magazines worked well. He and fellow tester Travis Fox shot the unit both slow-fire and rapid-fire successfully.
Gavin and Travis found the CMMG Kit easy to install and fun to use. With an AR that can shoot both .223 Rem and .22 LR, it’s like having “two guns in one”. Travis was impressed with the ease of use: “It is so simple to change over to the CMMG .22 LR AR kit! It took me about 68 seconds the very first time I tried. Each time after that it took me about 40 seconds — it’s that simple. It takes longer to fully load one of the mags than it does to switch over from .223/5.56 to .22 LR and back.”
The AR shot very well with the higher-velocity ammo types. 100% functioning was achieved with both 40gr Federal Game Shok ammo and American Eagle High Velocity 38gr Copper-plated HP ammo. NOTE: CMMG does recommend high-velocity Copper-plated rimfire ammunition.
Maintenance Tip — After converting back to your centerfire .223 Rem (5.56), Travis says “make sure to clean the gas tube and components as .22 LR tends to run dirty”. READ Full Test on UltimateReloader.com.
CMMG Bravo Conversion Kit Gets Thumbs Up from Gavin and Travis
“Does this conversion kit get the Ultimate Reloader stamp of approval? Absolutely! In these times of ammunition/component scarcity this gives options to shooters. Finding bulk .22 LR can sometimes be easier than 223/5.56. This kit gives that option at a great price. Any chance to keep skills up and familiarize new shooters to a platform is a good thing. Basically two rifles for a lot less than another rifle.”
How to Install CMMG Bravo .22 LR Conversion Kit
The Brownells video below shows the installation process step-by-step:
In this instructional video, a Brownells gunsmith demonstrates (step by step) how to install, disassemble, clean, lubricate, and reassemble the CMMG AR-15 .22 LR Conversion Kits. Clear the rifle and make safe before you start the conversion. Separate the upper and lower, remove the standard bolt carrier group. You then install the conversion bolt and connect the upper and lower as normal.
Details of CMMG .22 LR Conversion Kit
“For years I’ve had a CMMG conversion kit. It’s a drop-in system that’s … very reliable and it’s accurate. The [CMMG conversion] has lower recoil [and is] great for training. Even though ammo prices have gone through the roof, .22 LR is still cheaper to shoot than anything else.” — SootchGear
This SootchGear video shows how to install the CMMG Bravo unit. The video also compares the original CMMG .22 LR bolt assembly with the latest integrated CMMG Bravo at 2:00-3:50. The older unit had a brass adapter and separate chamber insert. The host also tests a CMMG-equipped AR with various types of ammo. Watch a rapid-fire sequence starting at 1:48 time-mark.
Field Test with Two ARs — Rapid Fire .22 LR Testing
The video below demonstrates rapid-fire .22 LR performance with two different ARs using CCI Mini-Mag ammo. The CMMG conversion is fast and easy: “In a matter of seconds you go from 5.56 to .22 LR”. Watch rapid-fire at 5:40 with CCI Mini-Mags in red/black rifle. Then the tester shoots a variety of ammo in a .223 Wylde-chambered all-black AR, starting at 9:40. The Mini-Mags worked flawlessly, but there were a couple fail-to-cycle sequences in extreme rapid-fire with cheaper “bulk” ammo. The lesson here is use good quality, high-velocity ammo.
NOTE: This 2018 video shows an earlier CMMG .22 LR conversion bolt that features a brass adapter and separate chamber insert. The current CMMG Kit has unitized bolt without a separate adapter or insert.
Interestingly, the Mini-Mag .22 LR ammo shot fine in the .223 Wylde-chambered AR. However, CMMG cautions: “Since .223 WYLDE is NOT a mil-spec chamber, we cannot guarantee fit or function with our 22LR conversion kits.”
Reviews from CMMG Bravo .22 LR Rimfire Conversion Kit Purchasers:
“Get it. Bought this for my Rock River AR. Bolt system goes in [easily] and fits perfectly. Took it to the range and put over 150 rounds through, only failing to feed/fire two rounds. I most definitely recommend this product to anyone looking to shoot their standard AR-15 .223 rifle on a budget.” — Pew P.
“I got this just yesterday and in two days time I have put a couple thousand rounds through it and no hick-ups. I have no complaints.” — Seth
“Best buy for anyone during this ammo crisis. Ammo is extremely expensive and hard to find. It was a ‘no-brainer’ once I found this kit. Ran 200 rounds to break it in for about $20 and had maybe 3 failures. Accurate up to 50 yards (I haven’t tried further) without optic adjustments.” — Joshua M.
“Purchased one of these in January. Took it to the range shortly after for my daughters to try out. We have three ARs and this thing functioned flawlessly. We practiced swapping out the 5.56 carrier with this back and forth, flawless. Enjoyed it so much now I’m purchasing another one.” — J.B.
“Great product. I bought this due to the high cost of ammo. I wanted to still shoot my AR and this was an alternative. This thing works great… works flawless with different types of .22 LR, from premium CCI to the cheap stuff. I recommend this to anyone thinking about getting one.” — Thom
* You can get also CMMG Conversion Kits from Brownells with one (1) 25rd mag for $219.99, or with three (3) 25rd mags for $249.99. There is also a CMMG kit with three (3) 10-rd mags for $249.99 for areas with capacity restriction.
Believe it or not, here is a cartridge that makes a .338 Lapua Magnum look like a toy. The 14.5x114mm cartridge was designed as a MG and rifle-fired anti-materiel round. To translate from the metric system to caliber and inches, the round is a mammoth .57 caliber which measures 4.49 inches to the case mouth, and 6.13 inches overall. That jumbo-sized case holds a whopping 655 grains of powder. Commonly-loaded projectiles weigh 920-1030 grains. The 993gr armor-piercing projectile has a muzzle velocity of approximately 1006 meters per second (3300 fps) and can penetrate 30-32 millimeters of RHA steel at a range of 500 meters.
The top photo comes from Elardus De Lang, a Forum member who works at the Truvelo Manufacturers Armoury in South Africa. Elardus also provided an impressive video showing the massive 14.5x114mm being shot from prone with a Truvelo-built bolt-action rifle. Elardus tells us: “Here is a video, with a slow-motion ending, of our 14.5x114mm anti-materiel rifle being fired in our indoor testing facility. This caliber is a true beast! It propels a 993gr Armor-Piercing Incendiary bullet to 3300 fps, burning 480 grains of powder in the process. [This shows] that rifles of that power level can actually be shootable. The concussion indoors is something to experience……every shot feels like you are being punched in the face, and the heat from the muzzle flash actually hits you like a wave!”
14.5x114mm Cartridge Design and Dimensions
The 14.5×114mm has 42.53 ml (655 grains H2O) cartridge case capacity. The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt action rifles and machine guns alike, under extreme conditions. Cartridges typically use lacquered steel cases, but some countries also use brass cases for the 14.5x115mm.
All dimensions are in millimeters (mm). Americans would define the shoulder angle at alpha/2, or 22.5 degrees. The common rifling twist rate for this cartridge is 455 mm (1:17.91″) with eight lands/grooves. According to official guidelines, the 14.5×114mm can handle up to 360 MPa (52,213 psi) piezo pressure.
14.5x114mm Cartridge History
The 14.5×114mm (.57 Cal) is a heavy machine gun and anti-materiel rifle cartridge used by the Soviet Union, the former Warsaw Pact, modern Russia, and other countries. It was originally developed for the PTRS and PTRD anti-tank rifles, but was later used as the basis for the KPV heavy machine gun that formed the basis of the ZPU series anti-aircraft guns that is also the main armament of the BTR series of armoured personnel carriers from the BTR-60 to the BTR-80 and for heavy anti-material sniper rifles. The cartridge was designed in 1939 and first issued in 1941.
Top Guns at LR Nat’l Championship: SSG Amanda Elsenbuss (2nd place), Oliver Milanovic (Champion), Jeffrey Miles (3rd place). Photo courtesy Shooting Sports USA.
Milanovic Wins LR National Championship
We have a new Long-Range National Champion. Competing at Camp Atterbury in Indiana, Oliver Milanovic took the 2021 NRA National Long Range Championship with a score of 1245-73X. Oliver was shooting an Eliseo Chassis + Borden Action Palma Rifle with 155gr bullets. Finishing second, tied on points but with four fewer Xs, was 2019 National Long Range Champion SSG Amanda Elsenbuss, with 1245-69X. In third place was Jeffrey Miles, just one point back, with 1244-73X.
As you can see, with the top three shooters all separated by just one point, it was a very close competition. But Milanovic, a popular marksman from Arizona, put on an impressive performance to take the win and the Thompkins Trophy. No stranger to the podium, Oliver has been on the winning Sling Division Team at the Berger SW Nationals in the past.
For all the relays, Milanovic shot his trusty .308 Winchester Competition Machine (Eliseo) chassis rifle with a Borden action, loading Palma-spec 155-gr bullets. In the Long Range Championship, other chamberings are allowed for some stages, but we’re told Oliver ran his 155gr Palma load throughout. Milanovic also won the Palma Individual Trophy Match with an impressive 450-30X score, not dropping a single point.
Dennis DeMille shows a young competitor at the CMP Western Games how to adjust his leather sling.
The NRA High Power Over-the-Course (OTC) National Championship will be held at Camp Atterbury over the next 7 days. Firing will be done in multiple positions — prone, sitting/kneeling, and standing. Proper support and adjustment of the sling is vital for successful High Power competition. In this short article, Dennis DeMille, a past Service Rifle Champion, explains how to set-up a sling on match rifles.
Setting-Up a Leather Service Rifle Sling for Competition
So you made the mistake of disassembling your leather service rifle sling, or are intimidated about how to use one? In this Creedmoor Sports InfoZone video, Dennis DeMille (past Creedmoor G.M.) explains how to set up and use a sling. The covers the basics — Dennis starts with a totally disassembled leather service rifle sling and shows you how to set it up properly.
Tip: “Many shooters shy away from using a leather sling because they have never been taught how to use one. That’s unfortunate. In my opinion a leather sling offers more support than a web sling, which is important when competiting with the heavier than normal rifles.”
Configuring the Sling for the Standing (Offhand) Position
In this second in a series of Creedmoor InfoZone videos on the setup and use of the leather service rifle sling, Dennis DeMille details how to configure and best utilize the leather service rifle sling while shooting from the standing position.
Tip: “Putting the Frogs in different hole will change the amount of added elevation a sling provides.”
Looking at Sling Types — Comparing the Features
In this video Dennis showcases a large variety of shooting slings. He explains the strong points of each type so you can choose the sling best suited to your discipline and shooting style.
The Benefits of Dry-Fire Training
Once you know how to set up your sling properly, you’ll want to practice. Dennis DeMille stresses the importance of dry-fire practice with sling and shooting coat. Dry-Fire training is essential to the sling disciplines. Dennis DeMille, a national Service Rifle Champion, told us that, for every minute he spent in actual competition, he would spend hours practicing without ammunition. While in the USMC, Dennis would practice in the barracks, working on his hold and dry-firing:
“The most important thing is to spend time off the range practicing. Most of what I learned as a High Power shooter I learned without ammunition — just spending time dry firing and doing holding exercises. Holding exercises will really identify the weak parts of your position. The primary purpose of dry firing is to get you used to shooting an empty rifle. If you can shoot a loaded rifle the same way you shoot an empty rifle then eventually you will become a High Master.”
Berger Issues Safety Notice for .223 Remington 77 grain OTM Tactical Ammunition
Berger’s Load Development Team has determined that some .223 Remington 77 grain OTM Tactical (Product # 65-23030) cartridges from Lot # P002745, P002745-1, P002745-2, and P002745-3 may cause function/ignition issues with AR-style gas operating platforms. Bolt action rifles are NOT affected.
Berger Ammunition Lots # P002745, P002745-1, P002745-2, and P002745-3 .223 Remington 77 Grain OTM Tactical ammunition, Item #65-23030 was shipped to retailers on April 2nd, 2021 to April 22nd, 2021.
If you own Berger ammunition from Lot # P002745, P002745-1, P002745-2, and/or P002745-3 or have questions regarding this notice, please contact Berger Customer Support at 660-460-2802 or support@capstonepg.com to arrange replacement of the product.
EDITOR: Once again, if you are running this ammo in a bolt-action rifle, there should be no issues according to Berger. If you had intended to use the ammunition in an AR-platform rifle, contact Berger for further information.
Recall is for Berger 77gr .223 Rem Ammunition when used in AR-Platform Rifles
Story notice from ELR Researcher. We welcome reader submissions.
Here is a cool video that shows the entire production process for a SilencerCo Octane pistol suppressor start to finish. Beginning with the raw materials, this video shows a wide variety of cutting, milling, drilling, burnishing, fitting, metal bathing, surface finishing, and laser etching processes.
If you have any interest in production methods you’ll want to watch this video all the way through, and maybe a second time.
SilencerCo states: “From cutting metal to chemical baths, to extensive quality control every step of the way, our streamlined process is more than just a few steps.” We think you may be surprised by how many steps are involved in producing this silencer (aka “suppressor”).
The Octane is a user-maintainable, multi-caliber centerfire pistol silencer featuring a modular mounting system for use across a wide range of hosts. High strength, stainless steel CTA™ (Click Together Assembly) baffles are easily disassembled for cleaning. This design makes the Octane one of the most durable small-caliber suppressors on the market.
In its Octane 45 review, SilencerShop notes: “When it comes to ease of maintenance, the Octane 45 is probably the simplest .45 suppressor on the market. It uses the new click-together baffle system from Silencerco/SWR – which allows the suppressor to come apart like a monocore suppressor, while providing performance that is closer to a K-Baffle design.””
Need a simple, easy-to-use drop chart for your rifle? Something you can tape right to the buttstock? Then check out Hornady’s handy Online Ballistics Calculator. This user-friendly calculator will compute your drops accurately, and output a handy “Cheat Sheet” you can print and attach to your rifle.
Here’s how it works. From the Ballistics Calculator Page, simply input G1 or G7 BC values, muzzle velocity, bullet weight, zero range, and a few other variables.
Click “Calculate” to view the full chart (shown below). Then click “View Cheatsheet” and the simpler, 4-line Drop Chart (shown above) appears. Click “Print” and you’re done!
Choose Basic Table or Advanced Version with More Variables
The online ballistics caculator is easy to use. You can select the basic version, or an advanced version with more data fields for environmental variables (altitude, temperature, air pressure, and humidity). You can also get wind drift numbers by inputing wind speed and wind angle.
Conveniently, on the trajectory output, come-ups are listed in both MOA and Mils — so this will work with either MOA clicks or Mil-based clicks. There are more sophisticated ballistics solvers available on the web (such as the outstanding Applied Ballistics Online Calculator), but the Hornady Calculator is very simple and easy to use. If you just want a basic drop chart, you may want to check this out.
Forum member Nodak7mm has discovered an ideal way to store your rifle cleaning rods in your garage or loading room. Using inexpensive Berkley Horizontal Fishing Rod Racks, Nodak7mm has secured a half-dozen Dewey rods on the back of a door. You could also mount the racks along a wall or on the side of a storage cabinet. This installation takes up minimal space and the Berkley Racks cost just $11.22 at Amazon (select “6 Rod Rack”) or $11.64 per set at Walmart. If you prefer wood, Amazon also sells a pine 6-rod wall rack for $22.45.
Nodak7mm explains: “I was moving some fishing poles around and ended up with an extra pair of Fishing Rod wall racks. I said to myself, ‘I bet this would hold my Dewey cleaning rods’. I mounted the pair on the inside of a closet door in my man cave and put my cleaning rods in it. It works like a charm and is far cheaper than a specially-made rack that only lets the rods hang. One can even slam the door with the rods mounted and they stay put. This rod rack set… is made by a nationally recognized name and does a great job of holding the cleaning rods securely and safely.” These are inexpensive and are easy to mount to a door or wood cabinet.
Stow Your Cleaning Rods on Your Gun Safe
Another option is to make a rod set with a magnetic backing strip. This can be affixed to the sides of your gun safe or steel storage cabinet. Here is a home-made, magnet-affixed cleaning rod holder made by Forum Member “BobM”. This smart installation works great. CLICK HERE for more information.
The 2021 NRA Long Range Target Rifle Championships, and Palma Matches, have been taking place this week at Camp Atterbury in Indiana. May of America’s top sling shooters have been competing, employing their skills on targets at 800 to 1000 yards. The Palma Team and individual matches were held August 15-16, with other matches running through Friday, August 19.
15 August — Palma Team Match
16 August — Palma Individual Match
17 August — Leech Cup/Porter/Andrus/Roumanian Team Matches
18 August — Wimbledon Cup/Farr/Doc Aiken/Herrick Team Matches
19 August — Mustin/Remington (and Shoot-offs)/Award Ceremonies*
Last day of the 2021 NRA National Long-Range Championships at Camp Atterbury:
Thomas Colyer Wins Leech Cup Shoot-Off
Forum member Corbin Shell reported: “I was fortunate to score for Thomas Colyer who shoots on the Oak Ridge Sportsmen’s Association (ORSA) long range rifle team. His Shoot-Off score was a 100-5X — not dropping a point. Michelle Gallagher was also in the Leech Shoot off and shot 99-3X.” A talented marksman, Thomas Colyer also won the Wimbledon Cup several years ago.
Phillip Crowe Wins Mustin Match
FYI, Phillip Crowe, also from Oak Ridge Sportsmen’s Association (ORSA) long range team, won the Mustin match with a Shoot-Off score of 99-3X. Here is a photo of Phillip at the beginning of the Mustin Shoot-Off.
According to the NRA High Power Rules 3.3.1 (a), a Palma rifle is “a rifle with metallic sights chambered for the .308/7.62 or .223/5.56 NATO cartridge case”.
When talking about Palma rifle competition, the traditional course of fire is at three yardages, 800, 900 and 1000 yards. The first Palma match was conducted by the NRA in 1875 at New York’s Creedmoor Range. The original Palma trophy, now lost to the ages, was commissioned by none other than Tiffanys. SEE 2018 SSUSA Camp Atterbury Long Range Gallery HERE.
Tired of spending $15-$25 for a can of spray lube that doesn’t last that long? For about the same price as a single 10 oz. can you can make your own effective spray lube that should last for multiple seasons and lube thousands of cases quickly and easily.
In the YouTube video embedded below, our friend Gavin Gear of UltimateReloader.com shows how to make your own case lube using simple, inexpensive ingredients. As recommended by the 6.5 Guys, this Liquid Lanolin + Isopropyl Alchohol mix works well and is very cost-effective. You can make a pint of this home-brew Lanolin case lube that will lube thousands of cases — many more than a typical commercial aerosol spray can (that’s mostly compressed air).
Gavin describes the exact mixing process on his Ultimate Reloader website. Gavin says this lube mix is a good complement to the Hornady One-Shot (pistol) and Dillon DCL (rifle) lubes he has used for pistol and rifle reloading sessions. CLICK HERE to read more.
Milanovic Wins LR National Championship
The Benefits of Dry-Fire Training
Forum member Nodak7mm has discovered an ideal way to store your rifle cleaning rods in your garage or loading room. Using inexpensive 
