Brownells is a well-known retailer of guns, gun parts, tools, accessories, ammo, and pretty much everything gun related. Brownells has a very active video production department that releases new “how-to” and product information videos every week. These videos offer helpful advice on gun cleaning/maintenance, reloading, as well as selecting/assembling components for various kinds of rifles. There now over 1000 videos on the Brownells YouTube Channel, this really is a remarkable resource.
One of our favorite regular Brownells video features are the Quick Tip Cartridge Comparisons. Brownells tech staffers look at a pair of cartridge types and reveal the noteworthy differences. Here are three recent Cartridge Comparison videos from Brownells.
6.5 Creedmoor vs. .260 Remington
Brownells Gun Tech Caleb Savant compares and contrasts the 6.5 Creedmoor rifle cartridge with the older .260 Remington. Both cartridges are often loaded to nearly the same overall length (OAL), but with more of the bullet inside the neck for the .260 Rem. The .260 Remington is basically a .308 Winchester necked down to 6.5mm (.264″). The 6.5 Creedmoor has a shorter case, with a more modern 30-degree shoulder angle. With the same cartridge OAL, that can make it possible to load longer-ogive, higher-BC bullets. However, with a long-freebore chamber, the .260 Rem can certainly run any high-BC 6.5mm bullet made.
The .260 Remington can, theoretically, generate a bit more velocity at the muzzle because its longer case holds a bit more powder. However, with high-quality Lapua brass, in the real world, the 6.5 Creedmoor comes pretty darn close to .260 Rem performance with any given bullet weight. Moreover, the 6.5 Creedmoor is available with small primer pocket brass from Lapua. This brass may give a higher number of reloading cycles before case-head expansion becomes a problem. For the hunter, both choices are good, but the older .260 Rem may feed a bit better from a magazine, given the .260’s case taper and longer body. Overall, we favor the 6.5 Creedmoor for its versatility and efficiency, but the .260 Rem is a good cartridge too.
6.8 SPC vs. 6.5 Grendel
Brownells Gun Tech Caleb Savant compares two medium-caliber cartridges that can work in AR15-platform rifles: the 6.5 Grendel and the 6.8 SPC (aka 6.8mm Remington “Special Purpose Cartridge”). The 6.5 Grendel is typically loaded with a high-BC .264″ bullet, while the 6.8 SPC has a larger-diameter .277″ bullet. Both have the same 2.26″ OAL as the AR-15’s standard .223 Remington / 5.56 NATO round. The big difference is the 6.5 Grendel’s faster velocity and flatter trajectory. With the same bullet weight, Brownells says the 6.5 Grendel will be about 100 fps faster than the 6.8 SPC. Given a 100-yard zero, the 6.5 Grendel will drop about 8.5″ at 300 yards, while the 6.8 SPC will drop 10.5″ at the same range. The 6.5 Grendel is probably a better choice for long-range targets, at least when loaded with a higher-BC bullet. A big difference is brass. You can get superb Lapua brass for the 6.5 Grendel. Not so for the 6.8 SPC, which really has never developed into a widely popular accuracy round.
7.62×51 NATO vs. .308 Winchester (Subtle differences)
Brownells Technician Caleb Savant talks about the .308 Winchester and 7.62x51mm NATO. Most shooters know that both rounds have the same external dimensions. In fact, the military 7.62×51 was developed from the civilian .308 Winchester. So… can they be used interchangeably? The 7.62×51 cartridge normally can be fired from any rifle chambered in .308 Winchester because the 7.62 is spec’d for a lower pressure than SAAMI max in the .308 Win. However, we have encountered some British and Austrian 7.62×51 NATO milsurp ammo that was VERY hot — more than a typical commercial .308 Win Load. Accordingly you should always be careful when shooting new 7.62×51 ammo in your rifles. Likewise you should be careful about shooting higher-pressure .308 Win in some 7.62 NATO rifles. The 7.62×51 NATO chamber is slightly longer, and the cartridge’s case is typically a bit thicker, so it will “flow” and expand into the extra space. NOTE: Some newer rifles with 7.62×51 NATO chambers ARE made to handle .308 Win ammo. Check the owner’s manual or contact your rifle’s manufacturer to find out for sure.
.44 Magnum vs. .45 Long Colt — Great Wheelgun Cartridges
Brownells Gun Tech Steve Ostrem does a quick compare-and-contrast of the .44 Magnum and .45 Long Colt — two of the most popular revolver cartriges. The .45 LC debuted in the 1870s, when the steel used in revolvers was much weaker than modern steel, so it’s typically loaded as a low-pressure cartridge. The .44 Magnum was developed in the 1950s specifically for hunting, and stronger modern gun steels meant revolvers could be built to handle its much greater pressures. Full-power commercial .44 Magnum ammunition tends to be easier to find. The .45 Colt you find at the gun store is loaded mildly so folks don’t blow up their vintage revolvers! BOTH cartridges are great for handloading because they have straight-wall cases and can handle a wide variety of powders and bullet weights. Dies, brass, and bullets are readily available for both. If you don’t handload but want a hunting revolver, .44 Magnum is the better choice, as there’s more FULL-power factory ammo available.
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Brownells is a well-known retailer of guns, gun parts, tools, accessories, ammo, and pretty much everything gun related. Brownells has a very active video production department that releases new “how-to” and product information videos every week. These videos offer helpful advice on gun cleaning/maintenance, reloading, as well as selecting/assembling components for various kinds of rifles. There now over 1000 videos on the Brownells YouTube Channel, this really is a remarkable resource.
One of our favorite regular Brownells video features are the Quick Tip Cartridge Comparisons. Brownells tech staffers look at a pair of cartridge types and reveal the noteworthy differences. Here are three recent Cartridge Comparison videos from Brownells.
1. 6.5 Creedmoor vs. .260 Remington
Brownells Gun Tech Caleb Savant compares and contrasts the 6.5 Creedmoor rifle cartridge with the older .260 Remington. Both cartridges are often loaded to nearly the same overall length (OAL), but with more of the bullet inside the neck for the .260 Rem. The .260 Remington is basically a .308 Winchester necked down to 6.5mm (.264″). The 6.5 Creedmoor has a shorter case, with a more modern 30-degree shoulder angle. With the same cartridge OAL, that can make it possible to load longer-ogive, higher-BC bullets. However, with a long-freebore chamber, the .260 Rem can certainly run any high-BC 6.5mm bullet made.
The .260 Remington can, theoretically, generate a bit more velocity at the muzzle because its longer case holds a bit more powder. However, with high-quality Lapua brass, in the real world, the 6.5 Creedmoor comes pretty darn close to .260 Rem performance with any given bullet weight. Moreover, the 6.5 Creedmoor is available with small primer pocket brass from Lapua. This brass may give a higher number of reloading cycles before case-head expansion becomes a problem. For the hunter, both choices are good, but the older .260 Rem may feed a bit better from a magazine, given the .260’s case taper and longer body. Overall, we favor the 6.5 Creedmoor for its versatility and efficiency, but the .260 Rem is a good cartridge too.
2. 6.8 SPC vs. 6.5 Grendel
Brownells Gun Tech Caleb Savant compares two medium-caliber cartridges that can work in AR15-platform rifles: the 6.5 Grendel and the 6.8 SPC (aka 6.8mm Remington “Special Purpose Cartridge”). The 6.5 Grendel is typically loaded with a high-BC .264″ bullet, while the 6.8 SPC has a larger-diameter .277″ bullet. Both have the same 2.26″ OAL as the AR-15’s standard .223 Remington / 5.56 NATO round. The big difference is the 6.5 Grendel’s faster velocity and flatter trajectory. With the same bullet weight, Brownells says the 6.5 Grendel will be about 100 fps faster than the 6.8 SPC. Given a 100-yard zero, the 6.5 Grendel will drop about 8.5″ at 300 yards, while the 6.8 SPC will drop 10.5″ at the same range. The 6.5 Grendel is probably a better choice for long-range targets, at least when loaded with a higher-BC bullet. A big difference is brass. You can get superb Lapua brass for the 6.5 Grendel. Not so for the 6.8 SPC, which really has never developed into a widely popular accuracy round.
3. 7.62×51 NATO vs. .308 Winchester (Subtle differences)
Brownells Technician Caleb Savant talks about the .308 Winchester and 7.62x51mm NATO. Most shooters know that both rounds have the same external dimensions. In fact, the military 7.62×51 was developed from the civilian .308 Winchester. So… can they be used interchangeably? The 7.62×51 cartridge normally can be fired from any rifle chambered in .308 Winchester because the 7.62 is spec’d for a lower pressure than SAAMI max in the .308 Win. However, we have encountered some British and Austrian 7.62×51 NATO milsurp ammo that was VERY hot — more than a typical commercial .308 Win Load. Accordingly you should always be careful when shooting new 7.62×51 ammo in your rifles. Likewise you should be careful about shooting higher-pressure .308 Win in some 7.62 NATO rifles. The 7.62×51 NATO chamber is slightly longer, and the cartridge’s case is typically a bit thicker, so it will “flow” and expand into the extra space. NOTE: Some newer rifles with 7.62×51 NATO chambers ARE made to handle .308 Win ammo. Check the owner’s manual or contact your rifle’s manufacturer to find out for sure.
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The .224 Valkyrie is the “trendy” cartridge now for AR shooters looking for better long-range performance than the standard .223 Rem (5.56×45) can provide. With the right bullets and load, the .224 Valkyrie offers significantly less drop and drift at long range. The .224 Valkyrie is basically a 6.8 SPC case necked down to .22-caliber. You can use your existing AR15 lower, but you will need a dedicated .224 Valkyrie upper, or at the minimum a new barrel, modified bolt with proper bolt face, and 6.8-compliant mags.
Valkyrie fans say this efficient cartridge offers performance rivaling a 22-250 in a smaller case. The Social Regressive YouTube channel 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.”
Valkyrie Video Fest — Five Informative Videos
Here are five videos featuring the .224 Valkyrie cartridge and rifle options. We think the two applications that make most sense for this new cartridge are: 1) PRS Gas Gun matches (Open Class) — you get 6.5 Creedmoor ballistic performance with much less recoil for faster shot transitions; and 2) Long-Range (400+ yards) varminting — you get performance similar to a 22-250 in a cartridge that works with your existing AR15 lower. That will really help with those long shots on P-dogs.
In this video Gavin Gear test the .224 Valkyrie cartridge in both AR and bolt-action rifles. Using a drone to capture images of shots on target, Gavin produces some impressively small groups at 600 yards. This shows that the .224 Valkyrie has serious accuracy potential when the load is right.
In this 37-minute video on the “IraqVeteran8888″ channel, Chad tests a .224 Valkyrie rifle with various ammo, including 90gr handloads. The test addresses the pros and cons of this new cartridge, explaining the need to have realistic expectations, and a barrel with twist rate suitable for your bullet choices. This is a long video, but worth watching if you are contemplating building or buying a .224 Valkyrie.
This follow-up IraqVet888 video focuses on reloading for the .224 Valkyrie. Chad addresses a multitude of issues including: powder selection, bullet options, brass longevity and primer pocket uniforming. If you own a .224 Valkyrie and hand-load for the rifle, you should watch this video.
Here Gavin Gear tests Starline’s new .224 Valkyrie brass, seeing how well it stands up to repeated firings. Gavin checked for primer pocket stretching and found that 50% of the cases went 8 or more firings before the primer pockets grew too much. However a few cases did need to be retired after four firings. Gavin notes: “Brass longevity is one of the key considerations for loading 224 Valkyrie, so I thought I would put my Starline 224 Valkyrie cases to the test! Be sure to read the full Brass Test article for more insights.
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.
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Shorter, Fatter, Faster, Flatter. The new .224 Valkyrie is the hot new cartridge for the AR15 platform. With a shorter, fatter cartridge based on the 6.8 SPC case, the .224 Valkyrie delivers high muzzle velocities for a flatter trajectory at long range. With the latest high-BC projectiles, the .224 Valkyrie can stay supersonic to 1300 yards and beyond.
Sierra Bullets recently provided new load data and twist info for the .224 Valkyrie: “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.”
Shown below is Sierra’s load data for bullet weights from 77 grains to 90 grains. Values in green indicate MAXIMUM loads — use CAUTION. NOTE: This is only a partial sample, less than a third of the data Sierra has published. Download Sierra’s Full 4-page PDF to view all the data, including load information for Sierra’s new 95gr .224-caliber MatchKing with claimed 0.600 G1 BC.
About the .224 Valkyrie Cartridge
Basically a 6.8 SPC necked down to .22, 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. With Sierra’s remarkable new 95-grain MatchKing, this gives the little Valkyrie long-range performance that can rival some much larger cartridge types. Sierra Bullets states: “The [Valkyrie] case length is shorter than the 223 Remington affording the use of heavier match-grade bullets with very long ogives and high ballistic coefficients. This offers … super-sonic velocities at ranges greater than the .223 Remington and the 6.5 Grendel can achieve at magazine length”.
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TECH TIP by Robert Whitley,AR-X Enterprises LLC
Over the years, while working with various AR-15 cartridges that require a larger bolt-face bolt (i.e. bigger than a 5.56 NATO/.223 Rem bolt-face, like those cartridges that use a 6.8 SPC bolt or the bolt face suitable for the 6.5 Grendel-based cartridges), I have found that there is an increased potential for a certain type of jam if a modification to the standard “Mil-Spec”, square-edged ejector is not made.
The original AR-15 square-edged ejector design was made for a much smaller-diameter bolt face and the smaller diameter 5.56 NATO/.223 Rem case, and it works perfectly in that application. However, as people have adapted the AR-15 platform to shoot bigger cartridges, some parts have been modified to accept the larger cartridges (i.e. bigger bolt-face bolts for the 6.8 SPC and the 6.5 Grendel, and different extractors), yet other parts have been all but ignored. One of these “ignored” parts has been the ejector. Most of the larger-bolt-face AR-15 bolts still use the standard “Mil-Spec”, square-edged 5.56 NATO/.223 Rem. ejector. That’s the problem. But there is a simple, reliable fix!
Chamfering AR Ejector for Improved Reliablity with 6mm, 6.5mm and 6.8mm Cartridges
With the larger bolt face and the larger-diameter AR cases, the old-style “Mil-Spec” ejector can cause infrequent but still annoying jams if the ejector is not modified. The jam can occur when a cartridge case feeds up and out of the right side of the magazine, and as it does so, the back of the case must slide across the bolt face and sideways over top of the ejector if it is to center up to the chamber and feed in. If the side of the case catches on the sharp-edged ejector you can get a jam. (See picture above).
Fortunately there is an easy fix for this. One way is to take the ejector out and spin it in a lathe or cordless drill and machine or grind it and round or chamfer the sharp edge. (See picture of rounded ejector next to square edged ejector).
Quick Fix Alternative — Bevel Your Ejector
Another “quick fix” is to leave the ejector in the bolt and chamfer the sharp edge with something like a Dremel tool. (See picture). This fix is easy to do and permanently resolves this potential feeding jam issue. There are no downsides to this modification if done right and I would recommend this modification for the ejectors in all larger bolt-face AR-15 bolts.
This gunsmithing tip provided by Robert Whitley of AR-X Enterprises LLC, 199 North Broad Street, Doylestown, PA 18901. Phone: (215) 348-8789. Website: 6mmAR.com.
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Nosler, Inc. has acquired Silver State Armory (SSA), an ammunition and cartridge brass manufacturer in Washington state. Nosler’s goal in taking over SSA’s product line and manufacturing capacity is to increase production in response to the current high demand for ammunition and reloading components.
According to Nosler’s President/CEO, Bob Nosler: “The Silver State acquisition provides a strategic opportunity for Nosler to increase capacity at this unique time in the history of our industry.”
Located in Packwood, Washington, Silver State Armory makes a wide variety of ammunition, loaded in its own cartridge brass with a variety of name-brand bullets (such as Nosler, Barnes, and Sierra). Primary ammo types are 5.56mm/.223 Rem, 6.8 SPC, and 7.62×51 ammo. SSA’s catalog also lists cartridge brass for: 6mm PPC, 5.56x45mm, 6.8mm SPC, .243 WIN, .260 REM, 7.62x51mm, and .308 Win, .270 Win, and .300 Win Mag.
Founded in 1948, Nosler is a family-owned company located in Bend, Oregon. Nosler, best known for its Partition® and Ballistic Tip® bullets, manufactures premium ammunition as well as component bullets and brass. Nosler also produces semi-custom rifles for domestic and international customers. In March of 2012, Nosler became ISO 9001:2008 certified.
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The latest CDNN Investments Catalog has been released. As usual there are some great deals on name-brand factory rifles. CDNN typically purchases overstocked inventory at deep discounts off normal wholesale and passes the savings on to CDNN’s customers.
To see all the latest deals you’ll need to download the current CDNN 2009-2 Catalog, a 100-page .pdf (Adobe Acrobat) file. Among the many bargains, below we list three that caught our attention. In addition to firearms, CDNN’s catalog also features magazines, gun cases, optics, and many other accessories.
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