Our friend Bill Marr of Rifleshooter.com has done it again — conducted a fascinating 6mm Creedmoor barrel cut-down test that reveals how velocity changes with barrel length. This time Bill started with a 24″ Proof Research stainless steel barrel on a Howa action. Bill says this was a well-used barrel, with over 1800 rounds through it. So, the velocities might be a bit different than a new barrel of similar length. Bill cut the barrel down in one-inch increments. Here are some results from the test:
For this latest test, Rifleshooter cut the barrel in one-inch increments from 24″ to 16.1″ (just over legal minimum). Velocities were measured with a MagnetoSpeed V3 chronograph mounted on arm attached to the stock. This allowed the chrono to be adjusted inwards as the barrel was cut shorter, inch by inch.
For the 6mm Creedmoor cartridge, Bill loaded Hornady 108gr ELD Match bullets over 41.5 grains of Hodgdon H4350 with CCI 200 primers in new Starline brass.
The results were interesting to say the least. Bill reports: “Muzzle velocities ranged from 2,893 ft/sec at 24″ to 2,598 ft/sec at 16″ for a decrease in muzzle velocity of 295 ft/sec. Muzzle velocity changes per inch of barrel length ranged from 6 ft/sec per inch between 20 and 19 inches to 63 ft/sec per inch between 19 and 18 inches. Average velocity change per inch of barrel length was 37.9 ft/sec.”
Bill concludes: “An average drop of 37.9 ft/sec/inch of barrel is fairly significant and is what would be expected with a fast moving 6mm cartridge like the 6mm Creedmoor. While I’m used to seeing 6mm Creedmoors with slightly longer barrel lengths than 24″, when coupled with a sound suppressor the additional length can make moving the rifle quickly more difficult.
I’d suggest staying with longer barrel lengths wherever possible with this cartridge. At shorter lengths, it does give up more performance than its big brother the 6.5 Creedmoor.”
More 6mm Creedmoor Velocity Data from 2017 Cut-Down Test
If you’re curious about 6mm Creedmoor velocities at longer barrel lengths, back in 2017 Rifleshooter completed a 6mm Creedmoor barrel cut-down test from 31 inches all the way down to 17 inches. The test included four bullet types from 95 grains to 110 grains. With the 110gr Sierra MK, velocity at 31″ was an impressive 3110 fps. Surprisingly the velocity didn’t decrease that much for the first few inches. Even at 26″ (a five-inch reduction), measured velocity with the 110s was 3073 fps, a loss of 7.4 fps per inch on average. With a barrel shortened all the way to 20″ however, velocity had dropped down to 2949 fps, a significant (161 fps) loss. CLICK HERE for complete results from that 31″-17″ Barrel Cut-Down Test.
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 new 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. And Brownells also sells complete Aero Precision 6mm ARC Uppers, starting at $749.99.
* 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.
Share the post "6mm ARC Cartridge — SAAMI Specs, Build Requirements, Videos"
The 6.5 Creedmoor is now one of the most popular cartridges chambered in factory rifles. It found favor among hunters and PRS competitors, but then its little brother the 6mm Creedmoor became widely adopted because the 6mm version delivered less recoil, equivalent or better ballistics, and lower bullet cost.
Now there’s a new Creedmoor kid on the block, the 22 Creedmoor. While this certainly can be used for PRS and tactical competition, the 22 Creedmoor seems to be ideally suited as a high velocity varmint round — something to replace the 22-250. You get 22-250 class velocities with a more modern cartridge design, and high-quality brass.
LEARN MORE about the 22 Creedmoor
There is an excellent write-up in the GunsAmerica Digest about the 22 Creedmoor cartridge. Reviewer Jeff Cramblit built a 22 Creedmoor rifle and tested it with a variety of bullet weights. He concluded it worked best as a varminter, but could also do PRS duty, provided it is loaded under the 3200 fps velocity limit common in PRS matches. CLICK HERE to read full GunsAmerica 22 Creedmoor test report.
Since there is not yet a SAAMI spec for the 22 Creedmoor, the cartridge is officially still a wildcat. However some ammo-makers are producing 22 Creedmoor loaded ammo right now: Copper Creek, Gunwerks, and Spark Munitions. We expect Hornady and possibly Federal might also produce loaded ammo in the near future. Currently Cooper Creek has the most 22 Creedmoor loaded ammo varieties, with 17 different bullet options from 60 grains to 95 grains. Copper Creek also offers load development packs with either Alpha or Hornady brass. Here are five Cooper Creek options with Sierra and Berger bullets:
In addition, multiple companies are now selling 22 Creedmoor cartridge brass: Alpha Munitions, Atlas ADG, Hornady, and Peterson Cartridge. The Peterson 22 Creedmoor brass is excellent.
Of course you can neck down high-quality Lapua 6mm Creedmoor brass. Lapua brass has outstanding consistency and durability. Choose from large primer or small primer types. Necking down is a simple one-step operation with a neck-sizing or full-length sizing die.
22 Creedmoor Brass from Peterson Cartridge
According to Derek Peterson, President of Peterson Cartridge, “We decided to build the tooling to make our .22 Creedmoor brass in response to the uptick in long-distance predator and varmint hunting. Plus the round is just straight-up fun to shoot. It is a low-recoil, flat shooting, wind-bucking round [that is] deadly accurate up to 800 yards.”
“When we designed the tooling for the .22 Creedmoor we set out to make casings with improved features”, Peterson added. “And we were successful. We increased the head hardness to tolerate higher pressures. And we increased our internal volume slightly to work better with the slow-burning powders [such as Reloder 26 or H1000].”
22 Creedmoor for Varmints — Video from the Varmint Fields of Eastern Oregon
Bullet Choices for 22 Creedmoor
If you have an appropriate twist-rate barrel, you can load the 22 Creedmoor with heavy 85-95 grain bullets. However, we think that the cartridge is better suited for lighter 65-80 grain bullets. This yields high velocities that provide explosive impacts on small varmints.
This GunsAmerica photo shows, L to R, 90gr Sierra MK, Hornady 88gr, 80gr, and 75gr .224 caliber bullets.
What is the Best Role for the 22 Creedmoor?
GunsAmerica tester Jeff Cramblit favors the 22 Creedmoor as a varmint round: “The performance of the 22 Creedmoor with 75-80 grain bullets makes it an outstanding varmint cartridge. I’ve seen claims of 80 grain Bergers at 3500 fps out of 26″ barrels, which would be devastating on any varmint. Loaded ammunition is available with bullets in the 70-75 range leaving 24” barrels at velocities around 3400+ fps, a bit more conservative than personal hand-loading, but still making it a very flat shooting, low recoiling round delivering impressive results.”
Jeff says the 22 Creedmoor will also work for PRS with heavier bullets: “I built the 22 CM to be a dual-purpose gun, or actually a 3-purpose gun. The first was for the coyotes and varmints previously mentioned. The second was for shooting PRS (Precision Rifle Series) style matches on occasion, and the third was for hunting deer-sized game. As with any multi-purpose tool there tends to be compromises.”
Peterson Cartridge Company (“Peterson”) has released a lengthy, authoritative guide to the 22 Creedmoor cartridge, a popular wildcat based on the 6.5 Creedmoor or 6mm Creedmoor necked down to .224 caliber. We think the 22 Creedmoor would be a great long-range varmint cartridge, similar to the .22-250 Rem, but with a more moder, efficient cartridge design. In addition, some PRS/NRL competitors may turn to the 22 Creedmoor because it has less recoil and is flatter-shooting than the 6mm Creedmoor. In addition, .224-caliber match bullets are typically less expensive than heavier 6mm and 6.5mm projectiles. Less recoil, and less cost — what’s not to like?*
Along with load data, this article has specific sections dedicated to: Primers, Rifling Twist Rates, and Reloading Supplies. If you are considering building a .22 Creedmoor, we recommend you download the full Peterson .22 Creedmoor article, which is available in PDF format.
Peterson states, “Since its inception in 2007… the 6.5 Creedmoor has seen some pretty meteoric growth in popularity. That growth continues as of this writing, as the cartridge has now gone mainstream with hunters and shooters alike. As the popularity of the 6.5 Creedmoor has increased, so has the number of wildcat cartridges based off of it. Some of those popular wildcat cartridges are the 6mm Creedmoor, the .25 Creedmoor, and now the .22 Creedmoor. This data sheet will cover the .22 Creedmoor.
To help our customers, and anyone else who shoots .22 Creedmoor, we decided to create this Data Sheet and distribute it. [In this LOAD DATA Document] you will find four (4) common bullets, and four (4) common rifle powders used when handloading the .22 Creedmoor cartridge. We then took the different bullet and powder combinations and loaded them up to the SAAMI Maximum Average Pressure (MAP) for the 6.5 Creedmoor and 6mm Creedmoor cartridges, which is 62,000 PSI. [O]ur goal was to provide a wide spectrum of bullet weights and the powders used with them.
All of the following data was gathered by our ballistician in our indoor ballistics lab located in our factory in Pennsylvania. Although we were able to gather pressure and velocity data in our lab, we have NOT tested these loads for accuracy. Again, these loads are just designed to give shooters information regarding what velocity, a given bullet and powder charge combination, will produce the SAAMI Maximum Average Pressure (MAP) of 62,000 psi.”
Sample .22 Creedmoor LOAD DATA
IMPORTANT — Pressures can vary significantly with different Cartridge Overall Lengths (COAL). In addition, ANY change to ANY load components — primers, bullets, brass, powder — can affect pressure. Always load conservatively. In addition, because of variances in bore dimensions, some barrels may show higher pressures than others. Again, always start with conservative loads, well below MAX pressures.
*Actually there IS a potential downside — reduced barrel life. We expect that a .22 Creedmoor running hot varmint loads would experience shorter useful barrel life compared to a 6.5 Creedmoor. This is based on what we’ve observed with .22-250 and .22-250 Ackley barrels compared to our 6.5 CM barrels.
Share the post ".22 Creedmoor Load Information from Peterson Cartridge"
Yesterday at the 2019 GAP Grind PRS match in Tennesee, Savage Arms unveiled three new Precision Series rifles — one centerfire rig, and two rimfire rifles. Aimed at PRS/NRL factory class shooters, these new rifles feature tweaked Savage actions in Modular Driven Technologies (MDT) chassis systems. The new Precision Series includes one centerfire rifle, the model 110 Elite Precision, and two rimfire rifles: the B Series bolt action, and the A22 Series semi-auto. All three new models utilize MDT chassis systems.
New Savage 110 Elite Precision
The new 110 Elite Precision is designed for PRS and NRL tactical-style competitions. Optimized for PRS/NRL Factory Class, this rifle boasts a blue-printed, black flash-nitrided 110 target action with gold-tone, titanium-nitrided bolt body. The fully-adjustable MDT ACC aluminum chassis features an ARCA Rail along its entire fore-arm, MDT Vertical Grip, and AICS mag compatibility. The Accu-Trigger adjusts from 1.5 to 4 pounds. Up front, Savage supplies a self-timing, taper-aligned muzzle brake. The 110 Elite Precision will be offered in eight (8) chamberings at two prices: .223 Rem., .308 Win., 6.5 and 6mm Creedmoor for $1,999; and .300 Win. Magnum, .300 Norma, .300 PRC, and .338 Lapua Magnum at $2,149.
Savage Elite 110 Precision Rifle Features:
Savage factory blue-printed 110 action
Stainless steel, flash-nitrided receiver
1.5-4 lb. user-adjustable AccuTrigger
Titanium Nitride bolt body
MDT ACC aluminum chassis, fully adjustable
Self-timing, taper-aligned muzzlebrake
MDT Vertical Grip and AICS magazine
ARCA Rail along entire fore-arm
Savage A22 Precision
The A22 Precision rimfire rifle employs Savage’s popular A22 delayed blow-back semi-auto action. Optimized for the NRL22 rimfire series and rimfire cross-training, this little self-loader features a custom MDT chassis similar to the B Series, adjustable length-of-pull from 13.5 to 14.5 inches, and an oversized charging handle. The A22 Precision weights 7.28 pounds. The company describes it as “the showcase to Savage’s love affair with the .22 LR.” The A22 is available in .22 LR for $599.
Savage B Series Precision
The new B Series bolt-action Precision rimfire rifle features an MDT aluminum chassis that adjusts for length-of-pull and comb height. The rifle ships with an 18-inch heavy barrel threaded at the muzzle, with a Picatinny rail on the action. This modestly-priced bolt-action rimfire also has a crisp Accutrigger. The B Series Precision comes in three rimfire chamberings, all for $599: .22 LR, .17 HMR and .22 WMR.
Doug Koenig’s Championship Season returns to Pursuit Channel celebrating its 9th season. The latest show features long range precision rifle competition. Doug travels to the 2019 Masterpiece Arms (MPA) Spring Shootout in Georgia, campaigning his 6mm Creedmoor bolt-action Ruger Precision Rifle. Doug has been a top competitor in Production Division (factory class), having posted multiple first-place Factory Class finishes in recent months.
Each week, Doug Koenig’s Championship Season airs on the Pursuit Channel three times: Wednesday at 5:30 pm (EST), Friday at 9:00 pm (Eastern Primetime), and Saturday at 1:00 am (EST). View past seasons and previously-aired episodes at PursuitTV.com. You can also see previews and get competition news on Doug Koenig’s Facebook Page.
Koenig said, “I’m relatively new to long range precision rifle competitions, but it’s the combination of shooting from fixed or uneven barricades, to the variety of shooting positions and distances that has captured my excitement for this sport.”
Koenig secured a Production Division win at the 2019 MPA Spring Shootout held at the Arena Training Facility in Blakely, GA with a final score of 173.00 and a time of 58.89. “The MPA match had some long shots out to 800-1356 yards, but my factory rifle got the job done and helped me win my third production class title in a row. That proves you don’t need to spend a fortune to get started in PRS competition.”
Precision Rifle matches offer a variety of challenges not found in benchrest or High Power matches. Over the course of multiple stages, competitors must shoot a wide variety of positions, standing, prone, and from barricade, while the clock is ticking. Some PRS/NRL matches even have moving targets. These matches test shooting fundamentals, while demanding good wind reading skills, and the ability to shoot at multiple distances in a stage. That demands good “dope” and the ability to hold-over and hold-off.
Koening Goes Hunting for Argentine Stag
Doug Koenig is also an avid hunter. In this Championship Season episode from 2016, Doug takes viewers into the field on an Argentine Stage Hunt. There is also some shotgun shooting footage:
Share the post "Precision Rifle Matches Featured on Doug Koenig TV Show"
At the request of our readers, we provide select “Deals of the Week”. Every 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.
1. Bruno Shooters’ Supply — Super Sale on Multiple Products
Bruno Shooters Supply is running a big sale on a wide variety of products — bullets, actions, triggers, riflescopes, and ammo. If you take the time to look at particular listings of Berger Bullets, you’ll find some of the best prices on the internet. There are deep discounts on March, Leupold, and Weaver scopes. Plus Bruno’s is also offering free shipping on LabRadar chronos and accessories. Bruno’s also carries the superb Lenzi rear bags. To see all the deals, visit BrunoShooters.com.
Electronic muffs let you hear range commands during matches. Champion’s new Vanquish Series electronic muffs offer great performance for the price, starting at $54.00 on Amazon. These feature HD speakers plus less than 1 millisecond sound compression technology. The Vanquish Pro ($113.86 on Amazon) and Pro Elite models offer Bluetooth connectivity, so users can take phone calls or listen to music at the range. The Elite models also offer Active Noise Cancellation (ANC). On all Vanquish models, the earpads are a nice soft foam for comfort, and the shell design is angled at the rear to provide more clearance on gunstocks.
The Ruger Precision Rifle (RPR) is very popular with hunters, varminters, and tactical/practical competitors. For RPR fans we’ve found two GREAT deals. First CDNN Sports is selling the RPR in 6mm Creedmoor for just $899.99. And if you prefer the .308 Win, a great hunting round, the price is even more attractive. Right now Gander Outdoors is selling .308 Win Ruger Precision Rifles for $783.82, the lowest RPR price we’ve ever seen! NOTE: If you join Gander’s email list you may also get 10% off your first purchase.
4. EuroOptic — FREE Kestrel 3500 with Leupold Mark 5HD Scope
Leupold’s new Mark 5HD scopes are impressive. Make no mistake — Mark 5HDs are fine tactical optics fully capable of winning PRS/NRL matches. Available in 3.6-18x44mm, 5-25x56mm, and 7-35x56mm with a multitude of reticle choices, there’s something for every tactical shooter out there. And right now when you buy any Laupold Mark 5HD scope from EuroOptic.com you get a FREE Kestrel 3500NV, a $269.00 value. That’s a fantastic bonus! The FREE Kestrel will be added to your cart automatically at no extra cost.
5. Midsouth — New .308 Win Lake City Brass, $79.99/250 cases
Midsouth Shooters has acquired a large quantity of excellent Lake City 7.62×51 (.308 Win) Primed Brass. NOTE, this is New Brass that has never been fired. However it is described as “pull-down”, meaning the brass had originally been assembled into loaded ammo. The brass comes PRIMED with CCI #34 primers, with crimped primer pockets. The brass is sold in 250-count bags for $79.99. That works out to just $0.32 per case — a great deal for primed, strong Lake City Brass. This is good stuff for M1As and hunting rifles.
6. Cutting Edge Bullets — 20% Off SALE All Bullets
Cutting Edge Bullets makes great lathe-turned, solid copper bullets for hunting and long-range shooting. These bullets have won major ELR matches. And now through September 14, 2019 you save save 20% on first-run Cutting Edge projectiles in a variety of calibers and bullet weights. If you’re a serious ELR competitor or long-range hunter, order now and save big. You’ll need to use code HUNT19 at checkout to receive the discount.
7. Amazon — 42″ Double Long Gun Case Backpack, $64.32
The Savior Tactical Double Rifle case will hold TWO rifles, plus a large pistol. This case has nice thick padding, plenty of pockets, AND comfortable shoulder straps so you can carry it like a backpack. Shown above is the 42″x12″ Flat Dark Earth (Tan) version, $64.32 on Amazon. Along with the 42″-long case, there are 36″, 46″, 51″, and 55″ models. The 55″ Savior Tactical case ($88.16 on Amazon) is big enough for most PRS rifles, even with long barrels. These gun cases also come in OD Green, Black, and Gray.
8. Graf’s — Free HazMat with $150 or More Purchase
We love FREE HazMat promos. This can save you $25 to $35 given what some vendors charge. Right now, at Grafs.com if you buy $150 or more worth of smokeless powder, black powder, primers, or musket caps, you’ll get FREE hazmat on the order. This deal runs through August 28, 2019. Waiver of the hazmat charge will be arranged automatically during online check-out if the order qualifies.
9. Amazon — Howard Leight MAX NRR33 Earplugs, $7.99/50 Pairs
20 Pairs
50 Pairs
With NRR 22-24 electronic muffs, we recommend running plugs under the muffs. These Howard Leight NRR33 Max plugs are your Editor’s favorite foam earplugs. 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. And if you act soon, you can get free shipping to boot.
10. Amazon — Jialitte Scope Bubble Level, $10.99
All serious rifle shooters need a scope level. This nicely designed Jialitte Scope Bubble Level features a 30mm milled inside diameter, plus an inner insert ring so it will also fit 1″-diameter main tubes — that dual-diameter versatility is a nice feature. We also like the way the unit is nicely radiused, and has a low profile in the middle. Price is just $10.99 with free shipping. User reviews have been very positive. You could easily pay $35.00 or more for a 30mm scope level. Purchasers have praised this product — nearly all verified buyers rated this five stars.
Share the post "BargainFinder 204: AccurateShooter’s Deals of the Week"
The 6mm Creedmoor has become one of the most popular cartridges for PRS/NRL competition, and it also works great in the varmint fields. There are many 6mm Creedmoor factory rifle options now, such as the Savage Model 10 in GRS stock and the Ruger Precision Rifle (6mm Creedmoor).
Do-It-Yourself 6mm Creedmoor Rifle Project — UltimateReloader.com
Another cost-effective option for 6mm Creedmoor fans is to build your own rifle, starting with a Howa barreled action. The Howa 1500 is a mag-fed, flat-bottomed bolt action that ships with the excellent HACT 2-stage trigger. Howa barreled actions are available with a variety of barrel lengths and contours, starting at about $430.00 at Brownells. There are quite a few good stocks/chassis systems now offered for Howa 1500 actions, including the excellent KRG Bravo Chassis, which features an ergonomic composite outer shell over a precision-machined inner chassis.
Gavin Gear fitted a KRG enclosed fore-end and Mystic Precision MPOD to his 6mm Creedmoor rifle.
Our friend Gavin Gear of UltimateReloader.com has built a nice 6mm Creedmoor rifle using a Howa 1500 heavy-barreled action and KRG Bravo Chassis. This project has proven very successful. The rifle has shown impressive accuracy and outstanding reliability. Gavin hopes to use this rifle in practical/tactical competitions later this year.
In this video, Gavin fits KRG’s enclosed fore-end to the KRG Bravo chassis. This accessory fore-end features a top Picatinny rail and various attachment options on the sides and lower section. Here you can see the enclosed fore-end (upper right) next to the factory forend included with the KRG Bravo (lower left):
Gavin then fits a Mystic Precision MPod from EGW. This stable, wide-base bipod uses a T-Slot rail for rifle attachment, and has legs that adjust independently for height. The video shows the rifle coming together step-by-step. This is something the average guy can do with simple tools — no gunsmithing is required, because the Howa barreled action is pre-chambered for the 6mm Creedmoor cartridge.
In the video above Gavin unboxes his Howa 1500 barreled action from Brownells. He then mounts the barreled action to the KRG Bravo stock, checking the torque levels. Next Gavin borescopes the hammer-forged barrel (5:55) noting: “What I saw I liked — there are practically no tooling marks. The finish on the lands and grooves looks really good”. Lastly, Gavin tested the trigger with his TriggerScan TS-11 (6:24), confirming a two-stage pull weight of about 2.25 pounds out of the box.
Share the post "6mm Creedmoor Built with Howa Action and KRG Bravo Chassis"
Sierra Bullets has recently released load data for the 6mm Creedmoor cartridge, a necked-down version of the 6.5 Creedmoor, a popular PRS, tactical, and hunting cartridge. Sierra has released very comprehensive 6mm Creedmoor load data, covering fifteen (15) different bullets from 55 to 110 grains. NOTE: Hornady-brand brass was used for Sierra’s 6mm Creedmoor load tests, not the newer, stronger Lapua 6.5 CM brass with small primer pockets. Hand-loaders using Lapua 6.5 Creedmoor brass necked to 6mm may have to adjust their loads.
Sierra writes: “As soon as the 6.5 Creedmoor was released in 2007, a 6mm version was being envisioned. After the 6mm Creedmoor demonstrated its worth at 1000 yards it began to catch the attention of Precision Rifle Series (PRS) competitors. The 6mm/6.5 Creedmoor is a great fit for those looking for an AR platform-friendly cartridge. It delivers velocities very similar to the .243 Win and yet fits the AR10 magazine length[.] The 30-degree shoulder makes this a very efficient case and helps prolong case life as well. The 6mm/6.5 Creedmoor works well with powders such as H4350, RE-17, and Ramshot Hunter for heavier long-range bullet weights. Slightly faster powders such as RE-15, Win 760, and Vihtavuori N540 work well with lighter weight bullets.”
Sierra Bullets Tested for 6mm Creedmoor Load Data
55gr BlitzKing (#1502)
60gr HP (#1500)
70gr HPBT (#1505)
70gr BlitzKing (#1507)
75gr HP (#1510)
In developing its 6mm Creedmoor load data, Sierra tested a very wide selection of propellants, two dozen overall. For the smaller bullets, fast-burning powders such as Benchmark, H4895, and CFE223 were tested. For the heavier 100+ grain bullets, Sierra tested a selection of medium-burn-rate powders including H4350, Reloder 16, Reloder 17, Varget, and Superformance. Sierra did a very thorough job. We know this information will be welcomed by 6mm Creedmoor shooters.
Don’t know what powder to try first? For the 107-110 grain bullets, if you want best accuracy and low ES/SD, our Forum members recommend Alliant Reloder 16 and Hodgdon H4350. If you are seeking max velocity with the 110-grainer, look at Hodgdon Superformance and Reloder 19.
Here are Sierra’s 6mm Creedmoor Load Data Charts for the 107gr MK and 110gr MK. There are a half-dozen other tables for lighter-weight bullets.
Share the post "Updated 6mm Creedmoor Load Data from Sierra Bullets"
Our friend Bill Marr of Rifleshooter.com has done it again — conducted a fascinating 6mm Creedmoor barrel cut-down test that reveals how velocity changes with barrel length. This time Bill started with a 24″ Proof Research stainless steel barrel on a Howa action. Bill says this was a well-used barrel, with over 1800 rounds through it. So, the velocities might be a bit different than a new barrel of similar length. Bill cut the barrel down in one-inch increments. Here are some results from the test:
For this latest test, Rifleshooter cut the barrel in one-inch increments from 24″ to 16.1″ (just over legal minimum). Velocities were measured with a MagnetoSpeed V3 chronograph mounted on arm attached to the stock. This allowed the chrono to be adjusted inwards as the barrel was cut shorter, inch by inch.
For the 6mm Creedmoor cartridge, Bill loaded Hornady 108gr ELD Match bullets over 41.5 grains of Hodgdon H4350 with CCI 200 primers in new Starline brass.
The results were interesting to say the least. Bill reports: “Muzzle velocities ranged from 2,893 ft/sec at 24″ to 2,598 ft/sec at 16″ for a decrease in muzzle velocity of 295 ft/sec. Muzzle velocity changes per inch of barrel length ranged from 6 ft/sec per inch between 20 and 19 inches to 63 ft/sec per inch between 19 and 18 inches. Average velocity change per inch of barrel length was 37.9 ft/sec.”
Bill concludes: “An average drop of 37.9 ft/sec/inch of barrel is fairly significant and is what would be expected with a fast moving 6mm cartridge like the 6mm Creedmoor. While I’m used to seeing 6mm Creedmoors with slightly longer barrel lengths than 24″, when coupled with a sound suppressor the additional length can make moving the rifle quickly more difficult.
I’d suggest staying with longer barrel lengths wherever possible with this cartridge. At shorter lengths, it does give up more performance than its big brother the 6.5 Creedmoor.”
More 6mm Creedmoor Velocity Data from 2017 Cut-Down Test
If you’re curious about 6mm Creedmoor velocities at longer barrel lengths, back in 2017 Rifleshooter completed a 6mm Creedmoor barrel cut-down test from 31 inches all the way down to 17 inches. The test included four bullet types from 95 grains to 110 grains. With the 110gr Sierra MK, velocity at 31″ was an impressive 3110 fps. Surprisingly the velocity didn’t decrease that much for the first few inches. Even at 26″ (a five-inch reduction), measured velocity with the 110s was 3073 fps, a loss of 7.4 fps per inch on average. With a barrel shortened all the way to 20″ however, velocity had dropped down to 2949 fps, a significant (161 fps) loss. CLICK HERE for complete results from that 31″-17″ Barrel Cut-Down Test.
“Koenig” (or König) means “king” in German. That is indeed appropriate for Doug Koenig, 18-Time Bianchi Cup winner, who is now starting to conquer the rifle world as well. Koenig, considered by many to be the best action pistol shooter on the planet, proved he’s an ace with rifles too, as he recently won two PRS matches in Production Division. Koenig, Captain of Team Ruger, was shooting a Ruger Precision Rifle (RPR), chambered in 6mm Creedmoor. Notably, Production Division limits rifles to $2000.00 for the gun ($4000.00 overall with scope). You can buy an RPR for around $1100.00 typically ($795.00 at GrabAGun), so Koenig was shooting against competitors with rifles that cost nearly twice as much. That’s impressive.
Koenig Wins Production Class at two Spring PRS Matches
Koenig took home a pair of Production Division titles at this year’s WAR Rifles Shootout and MAP Spring Shootout Precision Rifle Series (PRS) matches.
With a final score of 128.00 and a time of 58.51, team captain Doug Koenig took first place in Production Division at the WAR Rifle Shootout PRS match in Mount Victoria, MD. The WAR Rifle Shootout has a challenging 22-stage course of fire. Along with winning Production Division, Koenig also finished twelfth overall. “The tough course of fire and 15-25 mph winds at the War Rifle match were brutal, but my Precision Rifle, equipped with a Leupold VX-3i LRP and loaded with Hornady ammunition, continued to perform,” said Koenig.
Koenig then secured another Production Division win at the MPA Spring Shootout held at the Arena Training Facility in Blakely, GA with a final score of 173.00 and a time of 58.89. “The MPA match had some long shots out to 800-1356 yards, but my factory rifle got the job done and helped me win my third production class title in a row. That proves you don’t need to spend a fortune to get started in PRS competition.”
According to PRS standards, Production Division rifles are not permitted to be altered or improved in any way from the original factory configuration, and the retail price may not exceed $2,000.
Pre-Fit Barrel Options for the Ruger Precision Rifle
While PRS Production Division competitors like Koenig must stick with factory barrels, there’s no law that says you can’t upgrade your own RPR that’s not used in PRS matches. A barrel swap is probably the single best hardware upgrade you can make. A new custom barrel will improve inherent accuracy and shot-to-shot consistency. Krieger Barrels offers Pre-Fit barrels for the RPR in many popular chamberings including 6XC, 6mm Creedmoor, .243 Win, 6.5 Creedmoor, 6.5 PRC, and .308 Win. These “Drop-In Ready” barrels come finish-chambered and threaded to fit the Ruger action, with factory-spec muzzle threads. The Ruger barrel attachment system allows correct headspace with a pre-chambered barrel. Krieger explains: “Thanks to Ruger’s proprietary barrel nut design, a competent gunsmith will be able to swap out your barrel using an AR15 barrel wrench and proper headspace gauges.”
Share the post "Doug Koenig Makes His Mark in PRS Production Division"
There’s a formidable new option for PRS Production Class. MasterPiece Arms (MPA) is bringing out a new tactical/practicalcompetition rig, officially called the MPA BA PMR Competition Rifle. This new rifle has a $1999.99 price tag, making it suitable for Production Class. It will be offered with Curtis Action fitted to an X-Caliber, hand-lapped 26″ match barrel. Three chamberings will be available: 6mm Creedmoor, 6.5 Creedmoor and .308 Winchester.
This rifle is designed specifically for the Production Class requirements of the Precision Rifle Series (PRS) and has been approved for use within this division. It includes many competition-related features while staying under the $2,000 price limit for this class. It is available in either a Black or Tungsten Cerakote® finish. Accuracy is helped with a very good barrel — an X-Caliber, hand-lapped 416R Stainless premium barrel with a polished finish. The chamber is indicated within 0.0001” or less to the bore of the rifle.
The MPA BA PMR Competition Rifle utilizes the MPA BA Ultra Lite Chassis, CNC-machined from 6061 aluminum. The V-bedding system provides additional clearance for glass bedding action and straight section of the barrel. The chassis also includes a built-in inclinometer, thumb notch, lower mounted Picatinny Rail, 20 MOA Scope Rail, A2 Style Pistol Grip and is R.A.T. System compatible. The MPA Buttstock comes with an adjustable cheek riser and length of pull that are locked in position with a series of set screws that are embedded into the buttstock body. This is the same system MPA uses on its Standard BA Chassis, but without the thumb wheels.
Share the post "New PRS Production Class Rifle from MasterPiece Arms"
For this latest test, Rifleshooter cut the barrel in one-inch increments from 24″ to 16.1″ (just over legal minimum). Velocities were measured with a MagnetoSpeed V3 chronograph mounted on arm attached to the stock. This allowed the chrono to be adjusted inwards as the barrel was cut shorter, inch by inch.
