Instead of using the standard .223 Remington or 5.56x45mm NATO round, you have many options for an AR-15. Dozens of cartridge variants have been tried in AR-15s. Some of the most noteworthy and popular alternative chamberings for AR-15s are:
20 Practical — This is simply the .223 Rem necked down to .204 caliber. Requires new barrel. Same bolt, same magazines. Best bang for the buck. .224 Valkyrie — A necked-down version of the 6.8 SPC, the .224 Valkyrie was introduced by Federal a few seasons back. It has better ballistics than the .223 Remington, if used with a suitable barrel. 6mm ARC — Relatively new cartridge that works well for varminting, self-defense, tactical competitions, and deer hunting. Good selection of bullets and factory-loaded ammunition. 6.5 Grendel — Accurate and proven across the course, the 6.5 Grendel requires a new barrel, bolt, and magazines. Most use the 6.5 Grendel for competitive shooting and/or hunting. .300 Blackout — Moderately expensive, the .300 Blackout requires a barrel change. This is used for home defense, and hunting. WARNING — with some bullets this round can be chambered in a .223 Rem barrel, with disastrous consequences. .458 SOCOM — Pretty expensive, requires new barrel and bolt. The .458 SOCOM round is typically used for hunting though it was originally designed for Close Quarters Battle (CQB).
Of these six options, our favorite is the 20 Practical, followed by the 6mm ARC and 6.5 Grendel. The 20 Practical is a great varminting round. Check out our featured 20 Practical AR Rifle Report. This 20 Practical cartridge is highly effective on small varmints, and has shown outstanding accuracy in AR-platform rifles crafted by Robert Whitley.
20 Practical — High-Velocity, Affordable Alternative
The 20 Practical is simply a .223 Remington necked down to .204 caliber. This efficient little cartridge can launch 32-grainers at over 4200 fps, with impressive results on P-Dogs. This makes the 20 Practical a great choice for an AR-based varmint rifle.
20 Practical Ultimate Varminter
A decade ago, as a “proof-of-concept”, AccurateShooter.com 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 AR15 uppers. (The 20 Practical cartridge is simply the .223 Rem necked down to 20 caliber — you can use standard .223 brass and load with standard .223 Rem dies. Just swap in a smaller expander and use smaller neck bushings.)
6mm ARC — Popular New SAAMI Cartridge Promoted by Hornady
In June 2020, Hornady introduced the 6mm ARC, a new SAAMI cartridge optimized for AR-platform rifles*. The new 6mm ARC is basically a 6.5 Grendel necked down to 6mm, with the shoulder moved back around .030″. That pushed-back shoulder does reduce case capacity (and velocity), but we assume Hornady did that to create a shorter, proprietary chamber so people could not simply neck-down Lapua 6.5 Grendel brass, as has been done for years with Robert Whitley’s outstanding 6mm AR wildcat.
What Is the 6mm ARC Cartridge? The 6mm ARC cartridge is a modern SAAMI-spec cartridge based on the 6.5 Grendel case necked down for 6mm bullets, with the shoulder moved back 0.030. Yes it is designed to run in AR15-platform rifles. You’ll need a new barrel, bolt, and mags. If you already have an AR chambered in 6.5 Grendel, the ONLY thing you need to change is the barrel. Everything else — bolt, magazines, gas system – is compatible with 6mm ARC.
▶ Official SAAMI Cartridge (not wildcat)
▶ Fits standard AR15-platform rifles
▶ Fits Short/Mini action bolt rifles
▶ Efficient short, fat case design
▶ 30-degree case shoulder
What Do I Need To Shoot the 6mm ARC?
Faxon and Ballistic Advantage are already producing barrels, with more manufacturers sure to follow. All the other required components are already on the market for 6.5 Grendel rifles. Aero Precision already offers complete 6mm ARC uppers.
If you’re converting a standard 5.56×45 mm (.223 Rem) AR15 upper to shoot 6mm ARC, you’ll need a 6mm barrel, a Type II 6.5 Grendel bolt carrier group, and new magazines. Some folks have suggested standard AR mags will work, but trust us, you want the magazines that have been designed for 6.5 Grendel. All the hardware you need is currently available at Brownells.
While 6-6.5 Grendel shooters are known to run stout pressures, the new 6mm ARC cartridge has a relatively moderate Maximum Average Pressure (MAP) rating of 52,000 psi according to the official SAAMI specifications. For a variety of reasons, is wise to keep pressures in a semi-auto rifle moderate. Don’t chase the velocities you might get in a bolt-action gun.
The 6.5 Grendel — Accurate, Plus Good for Hunters
The 6.5 Grendel round is one of the most accurate cartridges for the AR-15 platform. The 6.5 Grendel round offers a larger-diameter, .264-caliber (6.5mm) bullet running at good velocities. This provides ample energy for smaller game and deer. The 6.5 Grendel is often used for hunting deer up to 300 yards.
History of the 6.5 Grendel Cartridge
The 6.5 Grendel originated as a 6mm PPC necked up to 6.5 mm. After Alexander Arms relinquished the “6.5 Grendel” Trademark, the 6.5 Grendel was standardized as an official SAAMI cartridge. It has become popular with target shooters and hunters alike because it is accurate, efficient, and offers modest recoil. Good for small to medium game, the 6.5 Grendel has been offered in lightweight hunting rifles, such as the Howa 1500 Mini Action.
.224 Valkyrie Cartridge — Impressive with Heavy .22-Cal Bullets
The new .224 Valkyrie was introduced in 2019 as a Hot Rod cartridge that will work in AR15s. Basically a 6.8 SPC necked down to .22 caliber, the Valkyrie has a shorter case than the .223 Remington (and 5.56×45 NATO). This allows you to load the longest, heaviest .224-caliber bullets and still feed reliably from an AR15-type magazine. Designed to rival the .22 Nosler while still running well in ARs, the .224 Valkyrie offers excellent long-range performance when loaded with modern, high-BC bullets. We expect some bolt-action PRS shooters might adopt the .224 Valkyrie. Why? Reduced recoil. With the 90gr SMK, the .224 Valkyrie offers ballistics similar to the 6.5 Creedmoor but with significantly less felt recoil. It can also be a viable alternative to a .22-250 for varminters using an AR platform.
Our friend Gavin Gear of UltimateReloader.com found a superbly accurate load with Berger 80.5gr bullets. Watch this video to learn more:
Sierra Bullets has published extensive load data for the .224 Valkyrie. This covers over a dozen powder types — many more than the Hodgdon database. Sierra’s .224 Valkyrie load data covers projectiles from 50 grain all the way up to 95 grains. With the 90 to 95 grain bullets, the little Valkyrie can give 6mm match cartridges a real run for their money — offering similar ballistics with less recoil. When selecting a barrel for the long .224-cal bullets, specify a fast enough twist rate: “Sierra recommends a 1:6.5″-twist barrel for the #9290 22 cal 90 gr HPBT bullet. However, for cartridges like the Valkyrie, that can push them over 2650 fps muzzle velocity, a 1:7″-twist barrel will stabilize the bullet correctly.”
CLICK HEREto DOWNLOAD Complete Sierra .224 Valkyrie LOAD DATA.
.224 Valkyrie vs. .22-250 Remington
The Social Regressive explains: “There are two key reasons why the .224 Valkyrie is unique and desirable. First, it is specifically designed to fit the limitations of the AR-15 platform. It does so even when loaded with gigantic bullets, like the 90-grain SMK that Federal announced. The .22-250 Rem is too long and too fat to work in the AR-15 platform; it needs an AR-10 bolt and magazine.”
The .224 Valkyrie has been marketed as a low-recoil round that can stay supersonic to 1300 yards and beyond (with 90gr Sierra MatchKings). Here a Sniper’s Hide duo shots an AR-platform .224 Valkyrie at distances out to 1550+ yards. To be honest, the accuracy wasn’t that impressive. However this test confirms that the .224 Valkyrie does launch the long, heavy projectiles at high enough velocities to prove superior to the standard .223 Rem. Frank Galli (aka “Lowlight”) teams up with Brian Whalen of Colorado Precision Rifle at the Blue Steel Ranch in New Mexico.
The .300 Blackout — Risky Business
The .300 Blackout appeals to folks who want a .30-caliber defense round. This can be loaded at various velocities. Loaded at subsonic speeds and shot with a suppressor, the .300 BLK offers very low sound levels. Unfortunately, that .300 Blackout cartridge can fit in a .223 Rem chamber. Shooting a .308-caliber bullet in .223 bore is a recipe for disaster.
The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
This images were provided by Tactical Rifle Shooters on Facebook. The message was clear: “Don’t try to run 300 Blackout in your .223/5.56mm. It won’t end well. The problem is identical rifles and identical magazines but different calibers.”
Image from Accurate Shooter Forum. Cutaway shows the jammed .30-Cal bullet:
For those who MUST have a .300 Blackout, here are some things you can do:
1. Use different colored magazines for .300 Blackout vs. .223 Remington.
2. Mark .223 Rem upper handguards with the caliber in bright paint.
2. Fit all your uppers with caliber-labeled ejection port covers.
4. Mark all .300 BLK Rounds with heavy black marker.
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This Saturday Movie showcase features four handguns chambered for the modern, high-velocity 5.7x28mm cartridge. In a 5″-6″ barreled pistol, the 5.7x28mm round can achieve very high velocities compared to a 9x19mm (9mm Luger) or .40 SW. The bottle-necked 5.7×28mm cartridge weighs roughly two-thirds as much as a typical 9mm Luger cartridge, allowing more rounds to be carried for the same weight. The cartridge can produce considerable muzzle flash when fired from a pistol, but it has roughly 30% less recoil than the 9mm Luger cartridge, improving controllability. Thanks to its high velocity, the 5.7×28mm has a flatter trajectory than most pistol ammo types.
Today we showcase videos of four different 5.7x28mm pistols — the new S&W M&P 5.7, the PSA 5.7 Rock, the Ruger-5.7, and the FN Five-SeveN Mk3 MRD. If you are looking for the best deal on a 5.7 pistol, check out the the PSA 5.7 Rock. You can buy one today for $599.99 including Holosun Red Dot Sight.
Smith & Wesson M&P 5.7 with 22-Rd Magazine
Chambered for the high-velocity, flat-shooting 5.7x28mm, the Smith & Wesson M&P 5.7 features S&W’s new TEMPO barrel system. This is a two-part, lock-breech barrel with a proprietary gas system for improved cycling and extraction. The new M&P 5.7 includes a 1/2×28 threaded barrel to mount a muzzle device or suppressor, optics-cut slide, flat-face trigger, and forward, frame rail for mounting accessories.
PSA 5.7 Rock — Best Value in a 5.7x28mm Handgun
The Palmetto State Armory (PSA) 5.7 Rock is the best value in a 5.7x28mm pistol. Right now PSA offers it complete with a mounted Holosun Red Dot sight for just $599.99 with two 23-rd mags. A full-sized, polymer-framed pistol, the PSA 5.7 Rock has threaded carbon steel fluted barrel and 416 stainless steel slide with QPQ finish for corrosion protection. Chambered in 5.7x28mm, the PSA 5.7 Rock is fed from a 23-round magazine and operated by a smooth, single-action, striker-fired trigger mechanism. While sold with a Holosun 407k optic, the 5.7 Rock slide accepts other Shield footprint optics.
Ruger-5.7 Pistol Review by Hickok45
In the video above, popular YouTube host Hickok45 reviews the Ruger-5.7, which was introduced in late 2019. This gun has proven reliable and when it hit the market it was much less expensive than its main competitor made by FN. Ruger’s 5.7x28mm pistol is blow-back operated with an internal hammer and ambidextrous thumb safety. The pistol is offered with a 20+1 capacity magazine and an adjustable rear sight paired with a fiber-optic front. Current MSRP is $899.00. If you’re interested in the Ruger-5.7, read the On-Target Magazine Full Review.
FN Five-SeveN Mk3 MRD Review
In this episode of TFBTV, James Reeves reviews the new FN Five-SeveN Mk3 MRD. At $1,449.00 MSRP, this is the most expensive 5.7x28mm pistol on the market, but might it also be the best? James takes the new Five-seveN Mk3 MRD to the range and to the table to tell you if FN’ lastest, high-tech 5.7x28mm pistol is worth the spend.
Ruger-5.7 vs. PSA 5.7 Rock
Ruger-5.7 vs. FN 5.7
Comparison Between 5.7x28mm and 9x19mm
In this video James Reeves compares the performance of the 5.7x28mm round with the 9mm Luger. The 5.7x28mm round certainly offers higher velocity and greater penetration than the legendary 9mm round. Plus common 5.7 magazines hold over 20 rounds. James discusses the advantages of this modern 5.7x28mm cartridge, as well as a few of its shortcomings — such as high cost per round. There is another insightful comparison between the two ammo types on the Ammo-to-Go website. Editor John Lewis notes: “5.7×28 is lighter and faster than 9mm ammo” while the 9mm had a “slight advantage in energy [and was] much better in gel”.
5.7x28mm vs 9mm Penetration Test
In this video the tester shot both 9mm and a 5.7x28mm bullets into horizontal stacks of paper plates. The smaller-diameter 5.7mm bullet penetrated about 40% more paper plates than the 9mm bullet (See video at 3:10-3:35). The 5.7mm bullet basically retained its dimensions in this test, while the hollow-point 9mm spread out slightly. Just mere horizontal penetration can’t tell you the actual effectiveness of the round based in a defensive situation. In a different test using Ballistic Gel, both rounds penetrated adequately but the 9mm created a bigger wound channel. SEE: AmmotoGo.com 5.7x28mm Test.
Short History of 5.7x28mm Guns and Ammo
The FN 5.7×28mm (designated as the 5.7×28 by the C.I.P. and FN 5.7x28mm NATO) is a small-caliber, high-velocity, rebated rim, bottle-necked centerfire cartridge designed for handgun and personal defense weapon uses. It is similar in length to the .22 WMR and somewhat similar to the .22 Hornet or .22 K-Hornet. Unlike many new cartridges, it has no parent case — it was developed from scratch by FN.
The 5.7×28mm was developed in conjunction with the FN P90 PDW and FN Five-Seven pistol in response to NATO requests for a replacement for the 9×19mm Parabellum cartridge (9mm Luger). In 2002 and 2003, NATO conducted a series of tests with the intention of standardizing a PDW cartridge as a replacement for the 9×19mm. The tests compared the relative merits of the 5.7×28mm cartridge and the 4.6×30mm cartridge, which was created by Heckler & Koch.
By 2006, FN’s 5.7×28mm firearms — the P90 PDW and Five-Seven pistol — were in service with military and police forces in over 40 nations worldwide. In the USA, 5.7×28mm firearms are currently used by many law enforcement agencies, including the U.S. Secret Service.
Along with use in military and law enforcement firearms, in recent years the 5.7×28mm cartridge has become popular for handguns in the USA. In December 2019 Ruger unveiled the Ruger-5.7 semi-automatic pistol chambered in this cartridge. In January 2021 Kel-Tec introduced its P50 handgun, which uses horizontal 50-round FN P90 magazines. In January 2021 Palmetto State Armory (PSA) introduced its Rock 5.7 pistol. And this year, Smith & Wesson has released its new M&P 5.7, featured above.
The 5.7×28mm cartridge itself is produced by multiple ammunition makers including Federal, Fiocchi, FN, and Speer. 5.7x28mm ammunition is PRICEY — the cheapest 5.7x28mm ammo we found with a quick search was 40gr Federal American Eagle at $0.77 round. By comparison, you can currently find bulk CCI 9mm Luger ammo for $0.30/round.
Some still images and text shared from Wikipedia: CC BY-SA 3.0
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The U.S. Army Marksmanship Unit (USAMU) has published a great series of reloading “how-to” articles on its Facebook Page. This post covers key factors to consider when loading ammunition for Match Rifles and Service Rifles, with a particular focus on self-loading “gas guns”. Visit the USAMU Facebook Page regularly for other, helpful reloading and marksmanship tips.
We offer some “cardinal rules” to help new gas-gun handloaders with safety and efficiency. These address both Match Rifle and Service Rifle versions of the AR15, M1 Garand, M1A, and M110. However, they can also improve safe reloading for many other auto-loaders such as M1 Carbines, FALs, SIGs, etc. The author distilled these principles many years ago to help focus on the essential aspects of these rifles.
RULE ONE: Service Rifles Are Not Benchrest Rifles
Gas-guns require a relatively loose fit between ammunition and chamber (vs. bolt actions) for safe, smooth operation. Many techniques, such as neck sizing and keeping cartridge headspace quite tight, are popular in the extreme bolt gun accuracy realm. However, they are of little value with Service Rifles, and some could even be hazardous. Before adopting a specialized technique, seriously consider whether it is appropriate and beneficial in a gas-gun.
RULE TWO: Never Compromise Safety to Obtain Accuracy
Example: If choosing a brand of great, but ultra-sensitive match primers offers possibly better accuracy at the risk of slam-fires in your design of rifle, don’t do it! You are issued exactly two eyes and ten fingers (best-case scenario). Risking them trying to squeeze 0.25 MOA better accuracy out of an M1A, etc. simply isn’t worth it.
RULE THREE: Tailor the Precision to Your Individual Skill and Your Rifle’s Potential
This has been addressed here before, but bears repeating for newcomers. If you are struggling to break out of the Marksman Class, or using a CMP M1 “As-Issued,” then laboriously turning the necks of your 600-yard brass is a waste of time. Your scores will improve much faster by practicing or dry-firing. On the other hand, if the reigning champions anxiously check your scores each time you fire an event, a little neck-turning might not be so far-fetched.
Verifying Load Improvements — Accuracy hand-loading involves a wide variety of techniques, ranging from basic to rather precise. Carefully select those which offer a good return on investment for your time and labor. In doubt? Do a classic pilot study. Prepare ammo for at least three or four ten-shot groups with your new technique, vs. the same with your standard ammo. Then, pick a calm day and test the ammo as carefully as possible at its full distance (e.g. 200, 300, or 600 yards) to verify a significant improvement. A little testing can save much labor!
This video explains the procedure for ordering an M1 Garand from the CMP.
RULE FOUR: Be Your Own Efficiency Expert
Serious Service Rifle shooters generally think of ammunition in terms of thousands of rounds, not “boxes”, or even “hundreds”. Analyze, and WRITE DOWN each step in your reloading process. Count the number of times each case is handled. Then, see if any operations can be dropped or changed without reducing safety or accuracy. Eliminating just two operations saves 2000 steps per 1000 rounds loaded. Conversely, carefully consider any measurable benefits before adding a step to your routine.
RULE FIVE: In Searching for Greater Accuracy with Efficiency, Look for System Changes
For example, instead of marking your 300-yard rounds individually to differentiate them from your 200-yard ammo, would a simple change in primers work? If accuracy is maintained, using brass-colored primers for 200 and silver for 300 provides an indelible indicator and eliminates a step! Similarly, rather than spending hours selecting GI surplus brass for weight and neck uniformity, consider splurging on some known, high-quality imported match brass for your 600-yard loads. Results should be excellent, time is saved, and given limited shooting at 600 yards, brass life should be long.
RULE SIX: Check All Your Primers Before Packaging Your Loaded Ammo
This seems simple and even intuitive. However, many slam-fires (which were much more common when M1s and M1As were the standard) are due, at least in part, to “high” primers. Primers should be seated below flush with the case head. The USAMU has addressed this at length in a previous column, but each round should be checked for properly-seated primers before they are packaged for use.
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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!
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.
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Most of us own a .223 Rem rifle. Now, thanks to our friends at Rifleshooter.com we can assess exactly how velocity changes with barrel length for this popular cartridge.
Rifleshooter.com performed an interesting test, cutting the barrel of a .223 Rem rifle from 26″ all the way down to 16.5″. The cuts were made in one-inch intervals with a rotary saw. At each cut length, velocity was measured with a Magnetospeed chronograph. To make the test even more interesting, four different types of .223 Rem/5.56 ammo were chron’d at each barrel length. The Rifleshooter.com team that conducts these tests has a full-service gun shop, 782 Custom Gunworks — visit 782guns.com.
Test Barrel Lost 25.34 FPS Per Inch (.223 Rem Chambering)
How much velocity do you think was lost, on average, for each 1″ reduction in barrel length? The answer may surprise you. The average speed loss of the four types of .223/5.56 ammo, with a 9.5″ shortening of barrel length, was 240.75 fps total (from start to finish). That works out to an average loss of 25.34 fps per inch.
5.56/.223 Barrel Cut-Down Speed Test 26″ to 16.5″
Start FPS at 26″
End FPS at 16.5″
Total Loss
Average Loss Per Inch
UMC .223 55gr
3182*
2968
214
22.5 FPS
Federal M193 55gr
3431
3187
244
25.7 FPS
Win m855 62gr
3280
2992
288
30.3 FPS
Blk Hills .223 68gr
2849
2632
217
22.8 FPS
*There may have been an error. The 25″ velocity was higher at 3221 fps.
Rifleshooter.com observed: “Cutting the barrel from 26″ to 16.5″ resulted in a velocity reduction of 214 ft/sec with the UMC 223 55-grain cartridge, 244 ft/sec with the Federal M-193 cartridge, 288 ft/sec with the Winchester M855 cartridge and 217 ft/sec with the Back Hills 223 68-grain match cartridge.”
How the Test Was Done
The testers described their procedure as follows: “Ballistic data was gathered using a Magnetospeed barrel-mounted ballistic chronograph. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Average velocity and standard deviation were logged for each round. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The barrel was cut off using a cold saw. The test protocol was repeated for the next length. Temperature was 45.7° F.”
See More Barrel Cut-Down Tests on Rifleshooter.com
Rifleshooter.com has performed barrel cut-down tests for many other calibers/chamberings including 6mm Creedmoor, .308 Winchester, and .338 Lapua Magnum. See these test results at Rifleshooter.com.
Much Different Results with 6mmBR and a Longer Barrel
The results from Rifleshooter.com’s .223/5.56 test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. When we cut our 6mmBR barrel down from 33″ to 28″ we only lost about 8 FPS per inch. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was longer than Rifleshooter.com’s .223 Rem start length. Velocity loss may be more extreme with shorter barrel lengths. And, of course, different cartridge types and powder/bullet combinations will yield different results.
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At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
1. Palmetto SA — PSA 16″ Barrel Complete AR 5.56 Rifle
⏺ Very good deal on complete 5.56 AR rifle with top rail
Well the corrupt politicians in Illinois have passed a so-called “Assault Weapons Ban” that will prohibit sales of many semi-automatic modern sporting rifles. That’s the 9th state that has done this. If you think it’s time to finally get that Black Rifle before ARs are outlawed in your jurisdiction, here’s a great deal from Palmetto State Armory. Get a complete modern PSA AR with 16″ barrel for $599.99, $400 off the regular price. This includes an adjustable stock plus flip-up MBUS sights. And you even get FREE Shipping to your FFL. This SHOT Show Sale is good for this week.
2. Brownells — January Black Rifle Sale, up to 45% Off
⏺ Major discounts on uppers, lowers, stocks, triggers and more
Now through the end of January 2023, Brownells is running a major Black Rifle Parts Sale. You can save up to 45% on a wide variety of AR-platform rifle components. On sale are lowers, uppers, complete rifle kits, triggers, bolt carriers, handguards and more. You’ll find all the part you need to build a Modern Sporting Rifle for home defense, varminting, or 3-gun games. if you own a lower, consider the Foxtrot Mike .223 Wylde Rifle Build Kit. It has a fully assembled upper with barrel and all the lower parts you need. This is on sale now for $499.99, marked down from $766.49, a 35% Savings. NOTE: On many of these items you can save even more with Brownells Discount Codes. These codes may work through 1/31/2023: JAN60 ($60 Off $475+); JAN35 ($35 Off $275+); JAN20 ($20 Off $150+); and TA10 (10% Off 150+).
3. Precision Reloading — 10% Off Whidden Dies and Products
⏺ Superb Whidden sizing and seating dies in stock and now 10% Off
Whidden Gunworks makes some of the best dies and reloading tools you can buy. And right now at Precision Reloading you can save 10% on a wide selection of Whidden die sets, individual dies, bump gauges and more. For example, a 6BR Ackley (6BRA) FL bushing Sizing Die is $102.05, marked down from $111.39. And a 6.5 Creedmoor Micrometer Seating Die is $125.01, discounted from $138.90. Dies for a wide variety of cartridge types, regular and magnum, are on sale now through 11:59 pm on 1/19/2023.
4. Amazon or MidwayUSA — RCBS Summit Press, $164.02
⏺ Unique compact design, also great for loading at the range
Do you need a press that can be mounted on a bench with limited space and no overhang? Consider the RCBS Summit Press. This press has a small footprint design making it very compact, versatile and easy to transport to ranges. With a 4.5″ opening, this has great frontal access and there is no linkage below the press. The case does not move — instead, the die is lowered onto the case. The Summit Press works with standard 7/8″-14 threaded dies, or 1-1/4″-12 with the reducing bushing removed. Our tester found this press to work great — READ FULL REVIEW. If you want an RCBS Summit Press — act quickly. Get it now for $164.02 on Amazon with free shipping for Prime members. It is also offered for $164.02 at MidwayUSA (shipping extra). These are great deals. The same RCBS Summit Press sells for $230 elsewhere!
5. Palmetto State Armory — Norma TAC-22 Ammo, $3.99/box
⏺ Excellent rimfire ammo at a GREAT price — .22 LR Deal of the Year
We’ve found no other .22 LR ammo that rivals Norma TAC-22 at anywhere near the price — just 8 cents per round ($3.99/box). If you shoot NRL22 or just practice for fun, grab some Norma TAC22 .22 LR ammo at Palmetto State Armory. On sale at just $3.99 per 50-round box, this TAC-22 ammo is a truly great bargain. In our test, it out-shot some ammo that cost $8 per box. During testing with a CZ 457, one of our Editors had multiple 5-shot groups at 50 yards that were typically one ragged hole (all shots touching). He observed “It’s amazingly good ammo for the money”.
⏺ Rugged backpack includes First Aid Kit and survival tools
This rugged EVERLIT Survival Backpack includes a 68 oz. Hydration Bladder. In addition the pack comes complete with 23 tools and accessories including compass, flashlight, glow sticks, multi-function pliers, saber card, paracord, poncho, shovel, thermal blanket and a well-equipped First Aid Kit! You get all this for $69.95 at Amazon — a pretty amazing deal. This is a great product for hikers and hunters. Choose either tan or black backpack for the same $69.95 price.
7. Amazon — Smart Weigh Gem20 Digital Scale, $18.69
⏺ Great little accurate, repeatable scale at amazing price — Watch the VIDEO!
The Smart Weigh Gem20 scale is a very inexpensive option for weighing chores in the reloading room. At this low price (under $20 currently), this is a great option as a back-up or travel scale used at the range. Of course it cannot perform like a $400+ scale, yet verified purchasers, including the maker of the video above, have praised the scale. Watch the video to see how precise it is — the scale measures kernel by kernel. Use the “mode” button to select grains. The scale can also weight in grams, ounces, and other modes. Use the tare function to zero with powder pan. This scale ships with two 10g calibration weights.
The 9mm Luger (9x19mm) is the most popular centerfire pistol cartridge. Every handgunner should keep a good supply of 9mm ammo on hand for days at the range. Here’s a great deal on quality, major-manufacturer 9mm FMJ pistol ammunition. Get 1000 rounds of Fiocchi 9mm 115gr FMJ ammo for just $259.99. That works out to just $13.00 per 50 count box, or $0.26 per round — a great deal.
⏺ Good, low-cost device for sighting-in hunting rifles
Need to sight-in that new hunting rifle? A handy in-chamber laser boresighter can get you on target quickly. The Hunter Select no-neck, shoulder-only .308 Win version ($10.99) should work with the entire .308 Win family, plus the 6mmBR and 6.5 Creedmoor families. In addition, also for $10.99, there are cartridge-specific units for .223 Remington and .30-06 Springfield (also works for .270 Win). These Hunter Select laser boresighters are cheap, easy to use, and effective. NOTE: Not all colors in stock currently.
⏺ Excellent, comfortable earplugs with 33 dB Noise Reduction Rating
These Howard Leight NRR 33 Max plugs are your Editor’s favorite foam earplugs. The flared outer edge creates a good seal and helps with fit. Between shooting, motorcycling, and mowing lawns, I probably have Max plugs in my ears 2-3 days a week. This is a very good price for a bulk pack of 50 pairs (100 plugs). NOTE: With the lower NRR thin earmuffs (NRR 21-22), we recommend running plugs under the muffs.
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Lapua just introduced two new Long Range Rimfire ammo offerings. New for 2023, Lapua’s Super Long Range and Long Range rimfire ammunition are optimized for long range accuracy and consistency. The goal was to have extremely low extreme spread (ES) and standard deviation (SD), to yield the highest precision down range. Shooters competing in disciplines such as NRL22X and Rimfire ELR where targets are routinely placed beyond 250 yards, will benefit from Lapua’s new ultra-consistent Long Range rimfire ammo. Both the new Long Range and the Super Long Range have a 1106 FPS muzzle velocity (from 26″ barrel) and a 0.172 G1 Ballistic Coefficient.*
Introducing Lapua Super Long Range and Long Range .22 LR Ammo
Lapua’s two new .22 LR cartridges are designed for use at distances of 100 yards and beyond. The result of extensive product development and extremely advanced production processes, Lapua Super Long Range and Long Range rimfire ammunition offer ultra-consistent velocities and BC values for every shot. These new ammo types are designed for those competing in .22 LR rimfire disciplines at longer ranges. Those disciplines include: NRL22X, PRS 22, Rimfire Long Range, rimfire benchrest, and Field Target shooting. These new ammo types provide excellent performance on targets at 100 yards and beyond. With a 1106 FPS muzzle velocity, Lapua Long Range and Super Long Range provide a flat trajectory and improved wind performance. Both rimfire ammo types bring a competitive advantage with the Super Long Range offering the very best group accuracy.
Lapua states: “With a flat trajectory and improved wind performance, Lapua Super Long Range provides the very best accuracy for any top .22 LR shooter looking to beat the competition at longer distances.” The new Lapua Long Range ammo offers similar performance with the same 1106 FPS MV.
“Lapua’s new Long Range offerings are a game-changer for shooters seeking a competitive advantage in today’s most popular rimfire disciplines”, stated Jeff Knowles, Lapua U.S. Sales Director. “Lapua’s product innovation and manufacturing capabilities are unprecedented”.
Ammo Availability: Lapua’s new Long Range rimfire offerings will soon be available at authorized Lapua retailers for delivery by the end of the first quarter of 2023. Learn more about new Lapua Long Range rimfire ammunition at Lapua.com.
About Lapua: For 100 years, Lapua has been producing the highest-quality small caliber cartridges and components for civilian and professional use. Lapua is a part of the Capstone Precision Group, exclusive U.S. distributor for Berger, Lapua, Vihtavuori and SK-Rimfire products.
*Ballistic coefficients are calculated by Quick Target Unlimited Lapua Edition from V0 to V75 BC. G1 BC for all rimfire .22 LR bullets = 0.172.
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If you read our lengthy article on Ultrasonic Case Cleaning by Jason Baney, you’ve seen the remarkable results that can be achieved with this method, as shown by the photo above. Ultrasonic cleaning has many advantages over traditional tumbling methods of case cleaning. There is no dust or media residue to remove from the brass, and when done right, the cases come out clean and shiny, inside and out, even the primer pockets.
In its Benchtalk Archives, Brownell’s has an excellent article discussing Ultrasonic Case Cleaning. Brownell’s staff compares results, with measured dwell times from 5 to 75 minutes, using both Mpro-7 and HCS 200 cleaning solutions. Tests are performed with once-fired and 5X-fired Tactical 20 (Tac20) cases, as well as once-fired .260 Rem Cases. The article also compares the results from ultrasonic cleaning vs. tumbling in walnut media. Below are Brownell’s results for Tac20 cases with the HCS 200 (non-acidic solution). Go to Brownell’s article for MPro7 results and Rem 260 results.
HCS 200 Cleaning Solution Test
Procedure — Solution was de-gassed for 15 minutes, then 63 Tac20 cases were placed in a single layer, in stainless steel mesh basket. The temperature of the starting solution was 102° F. When the cases were removed the temperature was 110° F.
Once-Fired Tactical Twenty Cases (HCS 200) — Observations 5 minutes: The exterior of the cases are not significantly brighter/cleaner. The primer pockets and case interiors are still dirty. 10 minutes: Exterior of the cases are brighter. 70% of the cases show some degree of cleaning of the primer pockets. Little difference seen inside the case, but case mouths are cleaner. 15 minutes: Case brightness is about the same. Still only 70% of the primer pockets are clean, but a larger portion of each is cleaner. A Q-tip swabbed inside the cases shows that carbon/powder residues are loosening up. 20 minutes: Case exteriors are brightening up. 80-85% of the primer pockets are about 90% clean. The insides of the cases and case mouths are cleaner. 25 minutes: Cases are brighter/cleaner than even new brass. 80-85% of the cases have almost completely clean primer pockets. The inside of the cases are 80-90% clean. 30 minutes: The insides of the cases and case mouths appear to be completely clean. 87% of the primer pockets are virtually 100% clean. 13% of the cases had stubborn primer pocket residue that could not be completely removed. 60 minutes: Eight cases (13%) were placed in the tank for another 30 minutes to try to remove the remaining residue in their primer pockets. Six out of the eight cases were completely clean.
Five-Times Fired Tac20 Cases — Observations 30 minutes: Based on the above observations, I didn’t begin to observe these 5-time fired cases until after 30 minutes: The exterior cases are bright/clean. Brighter than new cases. The primer pockets on 75% of the cases are 75% clean. The remaining cases had primer pockets that were only 25% clean. The inside of the cases appear to be clean. 65 minutes: 25% of the primer pockets were 95% clean, 25% of the primer pockets were 90% clean, 25% of the primer pockets were 85% clean; and 25% were 80% clean. 75 minutes: 75% of the primer pockets were 90% clean.
How Does Ultrasonic Cleaning Work? The Brownell’s Benchtalk article explains: “Ultrasonic cleaning uses high-frequency sound waves (generally between 20-80 kHz) to remove a variety of contaminants from objects immersed in a liquid. The result of these high-frequency sound waves is a process called cavitation. These high frequency bursts of ultrasonic energy produce a three-dimensional wave of alternating positive and negative pressure areas as the sound wave passes through the solution. During negative pressure, microscopic cavitation bubbles form and will continue to grown until they reach resonant size. As the positive sound wave passes, the pressure rises rapidly and implodes these tiny bubbles. Before these minuscule bubbles implode they store a tremendous amount of energy. These bubbles can be as hot as 10,000 degrees and have as much as 50,000 lbs per square inch of pressure. This sounds alarming, but you have to remember that these bubbles are microscopic in nature and pose no harm to anything, unless you are a carbon /powder residue deposit on a cartridge case!
When this cavitation bubble implodes near your brass case, it transforms the bubble into a jet about 1/10th of its size. This jet of energy can travel as fast as 400 km/hour. At 43 kHz, as is the frequency for our L & R HCS 200 ultrasonic cleaner, this is happening 43,000 times per second. This micro-burst of extreme energy is responsible for removing contaminants from the surface of your cartridge brass. Ultrasonic cleaning can reach into crevices and inaccessible areas and remove surface debris that can’t be cleaned by any other process.”
Do you have some ammo that got loaded incorrectly, perhaps with the wrong powder? Then you’ll want to disassemble the ammo for safety’s sake. You can use an impact puller to do this task, but if you have more than a dozen rounds or so, you may prefer to use a collet-style bullet puller. These work very quickly and positively, making quick work of big jobs. The efficiency of the collet-style puller is worth the investment if you frequently disassemble ammo. These devices retail for under $35.00 (collets sold separately). Normally, you’ll need a specific collet for each bullet diameter. But collets are not that costly, so this isn’t a big deal, particularly if you only load a few calibers, such as .223, 6mm, and .308.
Hornady and RCBS use different mechanisms to tighten the collet around the bullet. On the red lever Hornady Cam-Lock Bullet Puller, a lever-arm on the top of the bullet puller serves to tighten the collet around the bullet. Simply rotate the lever from the vertical to the horizontal position to grab the bullet. Lower the ram to remove the case. The bullet will drop out when you return the lever arm to the vertical position. This is demonstrated in the video below:
Hornady Cam-Lock Bullet Puller Demonstrated
Collet bullet-pullers resemble a loading die with a lever or handle on the top. They screw into a standard reloading press. Hornady and RCBS both make collet-style bullet pullers. They use the same basic principle — the device tightens a collet around the bullet, and then the bullet is separated from the case by lowering the press ram. NOTE: Collet pullers may leave small marks on your bullets, unlike impact (kinetic) pullers.*
Like the Hornady tool, the RCBS Bullet Puller employs a collet to grab the bullet. However, the RCBS tool tightens the collet in a different way. The head of the RCBS tool is threaded internally. By rotating the lever arm clockwise in a horizontal circle you squeeze the collet around the bullet. To remove the bullet, after lowering the press ram, simply spin the lever arm back in the opposite direction. The use of the RCBS tool is demonstrated in these two videos:
RCBS Collet Bullet Puller Demonstrated:
WARNING: When removing bullets from loaded cartridges, always make sure there are no obstructions or debris in your shell-holder or under the loaded round. NEVER engage a primer seating accessory on your press when working with loaded rounds. You can cause a round to discharge by contacting the primer! Also, we recommend you keep your head and torso away from the bullet puller tool at all times.
*By contrast, impact pullers rarely mark bullets, particularly if you put a little bit of foam or paper wadding in the closed end of your impact puller. When dismantling loaded rounds, powder kernels can get trapped in the wadding, so you should remove and replace the wadding before changing to cartridges loaded with a different powder type (assuming you intend to save the powder).
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At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
1. KYGUNCO — Rock Island Armory TM22 Rifle, $278.00
⏺ Slick, AR-style rimfire rifle with new features
Looking to get started in NRL22 competition, or want a rimfire varmint rifle with familiar AR look and feel? Then check out the Rock Island Armory TM22. This handsome semi-auto .22 LR rimfire rig weighs 6.5 lbs. with its 18″ barrel. The modestly-priced TM22 sports an AR-type grip, commercial buffer tube adapter, top rail, and M-LOK fore-end. The rifle is set up with right-handed controls, but the TM22 can easily be modified for left-handed operation. The TM22 ships with two 10-rd aluminum magazines with aftermarket 15- and 25-round magazines available.
2. EuroOptic — Trijicon Scope Sale
⏺ Major savings now on quality Trijicon optics
Trijicon scopes are being used by more rifle competitors and varminters/hunters because they’re great scopes for the money. If you’ve been wanting to give one a try, EuroOptic is having a major Trijicon Scope Sale with discounts up to 60%. You’ll find big discounts on FFP and SFP scope in a wide variety of power ranges and configurations — everything from AR scopes to long-range competition models.
3. Bruno Shooters Supply — Rimfire Ammo Sale
⏺ Save big bucks on case-quantity rimfire ammo
.22 LR rimfire shooting is fun, requires less barrel cleaning, and rimfire ammo is much cheaper than centerfire. If you’re getting into rimfire shooting check out Bruno’s rimfire ammo sale. You’ll find 5000-round case quantities of ELEY, Norma, and Wolf ammo at very attractive prices. In addition, individual 50ct boxes of CCI and Federal rimfire ammo are priced competitively.
4. MidwayUSA — Factory Seconds Bullet Sale (Great Prices)
⏺ Amazingly low prices on good bullets — many weights/calibers
MidwayUSA is running a great sale right now on factory second Blem Bullets. Choose tipped, BTHP, or Spire Point rifle bullets with prices as low as $0.16/bullet. There are a wide choice of rifle calibers (from .22 to .338) on sale, plus 9mm, .40, and .45 pistol bullets. The 77gr .22 Cal bullets are just $17.99/100 while 168gr .30 Cal match bullets are just $19.99/100. If you shoot CMP matches with an M1 Carbine, Garand, M1903, or M1A, these bullets will work great for practice and local matches. We can’t reveal the manufacturer but it’s one of the best.
5. Midsouth — LEE Challenger Breech Lock Kit, $144.89
⏺ Full reloading set-up all for less than many presses alone
Here’s a remarkable deal on the LEE Breech Lock Challenger Reloading Kit. For just $144.99 you get the Lee Breech Lock Challenger single stage press, Lee Perfect Powder Measure, Lee Safety Scale (manual), Lee Large and Small Safety Prime tools (for on-press priming), Chamfer tool, Lg/Sm Primer Pocket Cleaner, Lee Case Trimmer, Lee Cutter + Lock Stud, Powder Funnel, and even 2 oz. Resizing Case Lube. The Breech Lock Challenger press boasts a quick change die system, and spent primers conveniently eject down through a tube.
⏺ Great deal on RIMFIRE silhouette steel target 20-Pack
There are few things as fun as plinking with a .22 LR Rimfire rig at steel targets. It’s fun for kids and adults alike and right now you can grab a 20-ct pack of RIMFIRE animal targets in assorted sizes and shapes. They are 1/5 size and made from A36 steel plate. IMPORTANT: These small steel targets work great for rimfire shooting, but should NEVER be used with centerfire rifle cartridges.
7. Midsouth — Lyman Case Prep Xpress Center, $142.99
⏺ Multi-function Case Prep center at great price
The Lyman Case Prep Xpress performs a multitude of case prep functions, saving you time and effort. On sale for just $142.99 at Midsouth, this unit is a GREAT DEAL now as the same unit is $199.99 at MidwayUSA, so you save $57 bucks. The Lyman Case Prep Xpress boasts a high-torque motor with five tool stations. This allows the user to chamfer cases inside and out, brush case-necks, clean/uniform primer pockets, and ream military crimps.
8. Amazon — Frankford Arsenal Quick-N_EZ Tumbler, $59.99
⏺ Reliable vibratory tumbler with see-through lid
It’s hard to beat a good vibratory tumbler for basic brass cleaning. We like the Frankford Arsenal Quick-N-EZ tumbler for the $59.99 price. This Frankford Arsenal unit features a unique bowl design to enhance brass agitation for faster cleaning. A clear lid allows you to watch the process. There is a convenient cord-mounted on/off switch. This tumbling machine works with both Walnut Media and Corn Cob Media.
9. Amazon — Hat Target Hangers, $24.99
⏺ Hat Hangers for cans are great for fun shooting
Soda cans make great fun targets. With the GoSports Outdoors Blast Hat Target Hangers 12-pack you can hang 12 oz. soda cans so you can shoot them over and over again without having to pick them up off the ground. NOTE: The $24.99 price includes 12 polymer hat hangers only, NOT the soda cans. Shoot empty cans for practice or full soda cans for foamy fun. For another $47.57 you can get a target stand kit with 12 hook fittings — just add your own 2×4 wood beams to red brackets.
10. Amazon — Eylar 53″ Tactical Case, $159.99
⏺ Great price for long case with high-quality foam
Here’s a rugged, waterproof, TSA-compliant long-length hard case for just $159.99. The Eylar 53″ Tactical Slim Rifle Hard Case boasts three layers of foam: upper convoluted foam layer, second perforated pull & pluck cubed layer, and a third solid foam layer. This Eylar case meets TSA requirements, and two padlock fittings provide good security during travel. Unloaded case weight is 14.5 pounds. Inside dimensions are: 51″ Long x 11.1″ Wide — big enough to hold a long-barrel, scoped competition rifle.
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Looking for a good load for a new rifle? Or perhaps you want to try a new powder and bullet combo for an existing rig. One of the best places to start for load data is Hodgdon’s online Reloading Data Center for pistol, rifle, and shotgun reloaders. Check out the Reloading Data Center at www.HodgdonReloading.com.
In the Data Center, you’ll find thousands of load recipes for pistol, rifle, and shotgun. Rifle shooters will find dozens of loads for their favorite Hodgdon, IMR, and Winchester powders such as H4198, H4895, Varget, H4350, and IMR 8208 XBR. And Hodgdon’s Reloading Center is “mobile-friendly” so it works well with smartphones and tables. Navigation is easy, and you can set the search criteria easily choosing your favorite powder or bullets. After choosing a cartridge, you can pre-select specific bullet weights and powder types. That quickly delivers just the information you want and need. You won’t have to scroll through scores of entries for bullets or powders you don’t use.
NOTE: This shows results for two bullet weights and two powder choices. With more powders and bullets selected you will get more results. The “BUY NOW” buttons link to the Hodgdon webstore.
Reloading Center is Smartphone-Friendly
Mobile users will notice that the current Hodgdon Reloading Center is “user-friendly” for smart-phone and tablet users. Controls have been optimized for touch-screens, and buttons are large and easy to use.
How to Get Started with Handloading
Getting started in Reloading? Ultimate Reloader offers a helpful introductory video that covers the basics. In addition, a recent Ultimate Reloader article reviews the types of reloading presses, plus the other gear you’ll need, from dies to powder dispensers.
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20 Practical Ultimate Varminter
The 6mm ARC cartridge is a modern SAAMI-spec cartridge based on the 6.5 Grendel case necked down for 6mm bullets, with the shoulder moved back 0.030. Yes it is designed to run in AR15-platform rifles. You’ll need a new barrel, bolt, and mags. If you already have an AR chambered in 6.5 Grendel, the ONLY thing you need to change is the barrel. Everything else — bolt, magazines, gas system – is compatible with 6mm ARC. 
The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
This Saturday Movie showcase features four handguns chambered for the modern, high-velocity 5.7x28mm cartridge. In a 5″-6″ barreled pistol, the 5.7x28mm round can achieve very high velocities compared to a 9x19mm (9mm Luger) or .40 SW. The bottle-necked 5.7×28mm cartridge weighs roughly two-thirds as much as a typical 9mm Luger cartridge, allowing more rounds to be carried for the same weight. The cartridge can produce considerable muzzle flash when fired from a pistol, but it has roughly 30% less recoil than the 9mm Luger cartridge, improving controllability. Thanks to its high velocity, the 5.7×28mm has a flatter trajectory than most pistol ammo types.
Lapua just introduced two new 
If you read our lengthy article on 
The Brownell’s Benchtalk article explains: “Ultrasonic cleaning uses high-frequency sound waves (generally between 20-80 kHz) to remove a variety of contaminants from objects immersed in a liquid. The result of these high-frequency sound waves is a process called cavitation. These high frequency bursts of ultrasonic energy produce a three-dimensional wave of alternating positive and negative pressure areas as the sound wave passes through the solution. During negative pressure, microscopic cavitation bubbles form and will continue to grown until they reach resonant size. As the positive sound wave passes, the pressure rises rapidly and implodes these tiny bubbles. Before these minuscule bubbles implode they store a tremendous amount of energy. These bubbles can be as hot as 10,000 degrees and have as much as 50,000 lbs per square inch of pressure. This sounds alarming, but you have to remember that these bubbles are microscopic in nature and pose no harm to anything, unless you are a carbon /powder residue deposit on a cartridge case!
When this cavitation bubble implodes near your brass case, it transforms the bubble into a jet about 1/10th of its size. This jet of energy can travel as fast as 400 km/hour. At 43 kHz, as is the frequency for our L & R HCS 200 ultrasonic cleaner, this is happening 43,000 times per second. This micro-burst of extreme energy is responsible for removing contaminants from the surface of your cartridge brass. Ultrasonic cleaning can reach into crevices and inaccessible areas and remove surface debris that can’t be cleaned by any other process.”
Like the Hornady tool, the 
