6.5 Creedmoor AR, 6.5 Creedmoor AR10, Custom Bolt Action Rifle Accuracy in a Semi Automatic Rifle
6.5 Creedmoor is a modern short action rifle cartridge that brings competition level bolt action accuracy to 308 AR, AR308 and AR-10 based rifles.
Note: We often see 6.5 Creedmoor spelled 6.5 Creedmore, 6.5 Creedmoore, 6.5 Creedmor and 6.5CM
.308 Winchester Rifle Cartridge
The .308 Winchester cartridge is unquestionably the most popular short action rifle cartridge to date. It performs well in the hands of hunters, soldiers, snipers and competition shooters. It’s near identical sibling 7.62x51 has been designated 7.62 NATO. The .308 does a lot of things very well but it’s not perfect.
The .308 Winchester was brought to market in 1952. This means as I write this page the .308 Winchester rifle cartridge is 65 years old. Consider how much technology has changed in that 65 year period. Watching “I love Lucy” on a black and white tv has been replaced with watching “The Walking Dead” on a 4K OLED. Directly speaking to humans in person has been replaced by social media text messages. These powerful electronic devices are referred to as computers. These computers have made all sorts of amazing things happen such as letting middle aged men have a website devoted to their favorite weapon platform the 308 AR/AR 308 and more importantly these computers have allowed for purpose designed ammunition to be created. One such ammunition is the 6.5 Creedmoor.
If the .308 Winchester was designed for many shooting applications the 6.5 Creedmoor is the polar opposite. The 6.5 Creedmoor was designed by Hornady for one specific purpose. That one purpose is competitive rifle shooting. In 2007 Hornady released the 6.5 Creedmoor to the shooting public and among competitive rifle shooters it’s popularity has been growing ever since.
Wilson Combat states it best
The 6.5 Creedmoor is a top choice of precision rifle competitors and hunters looking for the optimum AR-based extended range rifle cartridge. It makes ultra long range shooting an easy proposition and offers similar long range trajectories to a .300 Winchester Magnum with less felt recoil than a comparable .308 AR rifle. The high ballistic coefficient bullets loaded in the 6.5 caliber make this downrange performance possible because they have less wind drift and more retained energy than a comparable .30 caliber bullet at 1000 yards. When seeking the best extended-range shooting or hunting performance in an AR 308 platform rifle the 6.5 Creedmoor is the logical choice. With a wide variety of quality factory ammunition available and .308 AR magazine and receiver compatibility, the 6.5 Creedmoor is in a performance class by itself.
The 6.5mm (and 6mm) bullets have found their way into many benchrest and wildcat rifle calibers over the years. There is very good reason for this. The 6.5mm long and thin bullet design is inherently accurate. This slender design allows the bullet to slice through the air with less friction and wind drift over typical bullet designs. The design of the 6.5mm bullet with proper propellants enables the bullet to travel with a fairly flat trajectory. These are critical features when shooting at extreme distances.
6.5 Creedmoor vs .308 Winchester
6.5 Creedmoor vs 308 Accuracy – The lower recoil 6.5 Creedmoor is ballistically superior to the 308 Winchester. The 6.5 Creedmoor shoots flatter with less wind drift than .308 Winchester. The .308 Winchester is a medium range rifle cartridge where as the 6.5 Creedmoor is a 1000 yard rifle cartridge. Under 500 yards accuracy is pretty equal for both cartridges. The 6.5 Creedmoor is inherently accurate. In fact 6.5 Creedmoor chambered premium AR’s are fast approaching custom bolt action rifle accuracy at a lower cost. This is HUGE. Advantage: 6.5 Creedmoor
6.5 Creedmoor vs 308 Recoil – The 6.5 Creedmoor has substantially less recoil than 308 Winchester. Advantage 6.5 Creedmoor
6.5 Creedmoor vs 308 Reliability – The 6.5 Creedmoor is having some growing pains with the semi automatic implementation. Feeding and cycling issues have been reported to affect some manufacturers. Advantage .308 Winchester
6.5 Creedmoor vs 308 Cost – Premium ammunition costs about the same for both calibers. 308 Winchester’s popularity provides a huge advantage with regards to costs. Bulk ammunition and reloading components are massively less expensive for .308 Winchester. 6.5 Creedmoor is only available as premium ammunition and reloading components. Advantage .308 Winchester
6.5 Creedmoor vs 308 Ammunition Availability – While the 6.5 Creedmoor is gaining in popularity and showing up on shelves of even the smallest gun shops it’s no match for .308 Winchester which is available anywhere rifle ammunition is sold. Advantage .308 Winchester
6.5 Creedmoor vs 308 Long Range Hunting and Sniping – While both cartridges especially the .308 are used for taking game at some pretty long distances both are being stretched beyond their intended designs for long range hunting of game animals. The energy for a clean kill drops quickly at long distances. In both long range hunting and sniping there are better choices. Military snipers now rely heavily on .300 Winchester Magnum while western hunters also prefer the 300 Win Mag, 7mm Mag and other magnum cartridges to take game at long ranges. If I had to use an AR and choose between the two calibers on a human at 1000 yards I would choose the 6.5 Creedmoor. On the flip side If I had to choose between the two calibers and dispatch a human through an obstruction at close range with an AR I would select the .308. Advantage: neither
Why Choose 6.5 Creedmoor Over .308 Winchester?
Why Choose 6.5 Creedmoor Over .308 Winchester? The answer is simple. At this time the 6.5 Creedmoor is one of the most accurate long range mass produced rifle cartridges available for the AR-10, 308 AR and AR 308 platforms. If group size at 1000 yards in an AR is important to you the 6.5 Creedmoor is the best choice. If throwing a bunch of inexpensive lead down range is your idea of fun stick with the .308. Lighter recoil and higher hit probability. Whats not to love?
6.5 Creedmoor vs .308 Winchester Conclusion
I was born with a Remington 760 .308 in my hands. Through inheritance I had that rifle before my first .22. It’s not easy in fact it’s a bitter pill to swallow that the new kid on the block the 6.5 creedmoor in many ways is superior in performance to my beloved .308 Winchester. In fact in many ways a more fair comparison would be against the 30-06 and 300 Winchester Magnum. Fortunately there’s room in my safe for all of them.
6.5 Creedmoor AR Rifles
As I write this we are beginning to see several manufacturers bring 6.5 Creedmoor to market. In most examples these rifles are setup for competition, benchrest and prone style shooting. They feature fixed stocks, long heavy barrels and muzzle brakes. Currently by most accounts the JP LRP-07 seems to be the most accurate. At half the price of the JP we have entries from Aero Precision, Smith & Wesson, Wilson Combat, Savage, Seekins Precision and Fulton Armory to name a few.
Build Your Own 6.5 Creedmoor or Upgrade an Existing 308 AR/AR 308 Rifle Barrel
Whether you want to build a rifle from scratch or upgrade an AR you already own the conversion to 6.5 Creedmoor is in most cases a simple barrel swap. Two extreme choices are the Proof Research Carbon Fiber and our favorite from our friends at Criterion Barrels.
US Army Special Operations Command Seeks Precision Intermediate Caliber Ammunition
During a briefing earlier this week at the NDIA Armaments Congerence in Fredericksburg, Virginia, COL Samuel Ashley, the DCS G8 for the US Army Special Operations Command, discussed a current initiative to identify a Precision Intermediate Caliber ammunition from within the 6.5mm family. In this joint effort between USASOC and PEO Soldier’s PM for Soldier Weapons, they will test 23 different cartridges in 6.5mm Creedmoor and .260 Remington later this month, using the Army’s 2000m Doppler RADAR equipped range, at the nearby Aberdeen Proving Ground in Maryland. Based on this research, they will conduct a user evaluation of the selected cartridge, in October. This is a very fast paced effort which aims to identify a 6.5mm family cartridge for integration into a USASOC requirement for a new semiautomatic sniper weapon. It will also give others a leg up in identifying a viable option for an intermediate caliber.
USSOCOM briefer, LTC Mark Owens, PM for Ammo, Weapons and Visual Augmentation Systems supports the efforts of SOF components like USASOC, and added some additional insight into where the ammunition selected from the USASOC study might go. He mentioned that in FY18 we should see the development of a 6.5mm Assault Machine Gun which would result in the fielding, soon thereafter, of an Intermediate Caliber Assault Machine Gun. The cartridge decision will also lead to the fielding of an Intermediate Caliber Sniper Rifle/Carbine in the years FY19-23.
Below is our 6.5 Creedmoor Blog Posts that cover 6.5 Creedmoor Rifles and Rifle Barrels
The SAVAGE MSR 10 LONG RANGE 6.5 CREEDMOOR RIFLE Model #22905 packs all the features and upgrades you would expect from a Savage precision rifle into a single platform. This MSR 10 is chambered in 6.5 Creedmoor and is built on a compact frame with a non-reciprocating side charging handle. It’s BLACKHAWK!® nickel boron treated two-stage target trigger and Magpul PRS® adjustable buttstock optimize the inherent accuracy of the upgraded Savage barrel, which features 5R rifling and a Melonite QPQ finish.read more
Hat tip to follower Scott D for making us aware of the Diamondback DB10 line of 308 AR Rifles. Product Specs Model: DB1065CB Caliber: 6.5 Creedmoor Finish: Black Anodized Hardcoat Barrel: 20” Stainless Steel Fluted Twist: 1:8 Gas System: Rifle Length Gas System Bolt Carrier Group: Azimuth Black Nitride, AR 10 Carrier w/ Multi-Cal Bolt, DPMS Style Barrel Extension, High Pressure Firing Pin Lower Receiver: Forged 7075 T6 Aluminum Upper Receiver: Flattop Forged 7075 T6 Aluminum, T-Marked Handguard: 15” M-LOK Rail Selector: Ambidextrous Safety Selector Grip: Fab Defense Rubberized Ergonomic Pistol Grip Stock: Fab Defense GL Shock Mag: 5 and 20 Round Metal Mag Weight: 9lbs 1oz. Overall Length (Stock Collapsed): 38.5” Overall Length (Stock Expanded): 41.75” Muzzle Device:read more
When it comes to rifle barrels they can often be separated into different classes of performance. The top level performers are what I refer to as “No Excuses Barrels”. Lilja is one of the small handful of custom barrel manufactures producing these no excuses barrels for winning competitive shooters world wide. More importantly Lilja Rifle Barrels was named exclusive supplier for .30 caliber Mk13, Mod 7, and .50 caliber Mk15 barrels for the Navy SEALS. Lilja is now offering benchrest level performance 6.5 Creedmoor drop in barrels for 308 AR/AR308 shooters. They are available in 20″, 24″ fluted and unfluted. Barrels are also available in .260 and .308 Winchester.read more
Take the long range accuracy of your 308 AR, AR 308 or AR-10 to new levels with a simple barrel change to 6.5 Creedmoor.read more
Now this is pretty awesome. A S&W Performance Center M&P 10. This is essentially a sub $2000 factory custom 308 AR chambered in 6.5 Creedmoor. The SMITH & WESSON M&P 10 6.5 CREEDMOOR M-LOK 20″ 10+1 Performance Center Rifle is versatile, easily accessorized and suitable for a wide variety of recreational and professional shooting applications. Engineered with 5R rifling and 1-10 twist, the M&P10 is as accurate as it is powerful. Fitted with 15″ free-float Troy® M-LOK® handguard around a 20″ slim profile barrel, the S&W M&P10 6.5 Creedmoor comes with full length top rail for mounting your favorite optic. The forged upper and lower receiver on the M&P10 6.5 Creedmoor fit tightly together to give you optimum performanceread more
The VG6 Gamma 65 hybrid muzzle brake and compensator was designed with precision techniques to eliminate recoil and dramatically lessen rifle movement. The Gamma 65 has been machined for the user with optimal performance in mind. The VG6 Gamma 65 features both breaking and compensating to inspire confidence and allow faster follow up shots. The perfect muzzle brake for your next 6.5 Creedmoor chambered 308 AR or AR-10.read more
The Aero Precision 6.5CM OEM Rifle is a great way to get in to a 308 AR at a caliber other than .308 Winchester. The other caliber is the incredibly accurate 6.5 Creedmoor. If your unfamiliar with the 6.5 Creedmoor it’s gained a lot of press as an option for the United States Military as an option for a platform capable of longer range accuracy than the .308.. Available only from Brownells the AERO PRECISION 6.5 CREEDMOOR AR 22″ OEM RIFLE is nearly-complete rifle and comes fully assembled, just waiting for you to add a free-float handguard, sighting system, and a buttstock that fits a mil-spec carbine receiver extension. Install them and head to the range!
Constructed using top-quality mil-spec components, Aero Precision’s 6.5 Creedmoor OEM Rifle is ready to be turned into the custom rifle of your dreams at a fraction of the cost you’d normally pay for such a rifle. Part of the cost saving comes from not paying for components you are only going to replace anyway.read more
So you have DPMS pattern 308 AR chambered in .308 Winchester and your bored with it, want something different or want the utmost accuracy at ranges beyond .308 Winchesters capabilities. Well Aero precision has just what you need in their M5E1 6.5 Creedmoor Assembled Upper Receivers. These receivers fit most 308AR’s that follow the DPMS pattern. The Aero Precision M5E1 uppers are a very slick design that eliminates a barrel nut by implementing a proprietary upper receiver and handguard system. The 6.5 Creedmoor chambered upper are available in 16″, 18″, 20″ and 22″ barrel lengths.read more
With the release of its new patent-pending Caliber Matched Gas System (CAMGAS) barrels, PROOF Research has eliminated the issues traditionally associated with building 6.5mm and .260 rifles on 308 AR AR-10 platforms. Until now, AR-variant shooters looking for ballistic advantages from either of these calibers were faced with excessive bore pressures that necessitated makeshift solutions such as clipping buffer springs, adjusting buffer weights, and/or relying on adjustable gas blocks, to keep their rifles functioning properly.
PROOF’s R&D team has solved the overpressure issue with gas systems tuned specifically to the cartridge/barrel-length combination. “By moving the gas port, the pressure in the bore is given time to reduce to that comparable of a .308 Winchester with a rifle-length gas system, which is what the 308 AR AR-10 system was designed around,” said Greg Hamilton, PROOF’s research-and-development weapons specialist who’s also a 3-Gun and PRS competitive shooter. “The recoil impulse is noticeably smoother, which helps keep you on target while taking advantage of a more efficient projectile. Case extraction is also easier, with less case-head smearing, so the brass is in much better condition for reloading.”read more