Skip to main content

The Accidental 6mm Creedmoor

TheAccidental6mm_FThe 6mm is what I'd call a "gentlemen's rifle." They have more utility than any .22 and are a little easier and more fun to shoot than the 6.5mm. The bullets move faster, and the ballistic coefficient (BC) in the heavier bullets is excellent, so they make for flat- shooting, low- recoiling cartridges. If you find yourself doing a lot of positional or field shooting and want to see where rounds impact, the 6mm is a great place to start.

The most common 6mm is the .243 Winchester, based on the .308 case. Another popular 6mm is the 6XC created by David Tubb for Across the Course matches. It's based on the .22- 250 case. There's the 6x47 Lapua wildcat based on the 6.5x47 Lapua. Finally, we have the 6mm Creedmoor based on the 6.5 Creedmoor.

Of the bunch, no cartridge combines maximum case capacity in a VLD (very low drag) friendly case like the 6mm Creedmoor.

The 6mm Creedmoor, like a lot of life's finer things, was a happy accident. John Snow, an editor for Outdoor Life and a good friend of mine, wandered over to G.A. Precision's booth during the 2008 SHOT Show. Snow had a few questions for George Gardner for an article he was writing about the process of wildcatting cartridges. Snow talked to Hornady in late 2007 about basing a wildcat on the 6.5 Creedmoor and wanted to get Gardner's thoughts.


length.


Gardner liked the idea and thought that it would be a great cartridge for all the reasons the 6.5 Creedmoor is a great cartridge. It gives the shooter maximum case capacity when loaded to magazine length with VLD bullets.

Hornady, Snow and Gardner all worked together on the project. Snow necked the 6.5 Creedmoor down to 6mm, while Gardner helped draw up the dimensions for a reamer and built the rifle for it. It all went down pretty quickly and successfully.

A couple of years later, Gardner found himself in need of a semiautomatic 6mm for a match rifle and didn't like what he saw with the .243 Win. The neck was way too short, so VLD bullets would seat well into the neck/shoulder junction when

loaded. It's not a big deal with new brass, but brass doughnuts form at the junction and create inconsistent neck tension once reloading starts. This can lead to dangerous pressure spikes, so the .243 Win. was never a contender.


The 6mm Creedmoor from the wildcatting project was the perfect fit. VLDs sat in the case inside a magazine with no issues, so Gardner loaded up a bunch and started competing with it. The G.A. Precision team noticed and started asking Gardner for bolt actions chambered in the same cartridge.

No one wanted to keep necking down 6.5 Creedmoor brass, so Gardner called Hornady to ask what it would take to make legit 6mm Creedmoor brass. Turns out, all they needed was a small insert to size the neck correctly and a new headstamp that said "6mm Creedmoor" (it was a little spendy).

Gardner agreed to pay for the headstamp and tooling insert, and asked that they do a run of brass next time they made some 6.5 Creedmoor before they tore everything down. Factory brass has been available ever since.


Theaccidental6mm_3The 6mm Creedmoor is a great little cartridge that is growing in popularity. Most shooters are handloading, but loaded ammunition is available from a custom ammo house named Copper Creek Cartridge Co. A fella named Josh Lapin owns the company and specializes in producing whatever load you want. Right now he's loading a bunch of 6mm Creedmoor and 6.5 GAP 4S. Lapin is a smart and hard-working guy that does a great job answering questions. He and his products also perform as advertised.

I tested all of Lapin's standard 6mm Creedmoor offerings and found them to be more consistent than most premium match ammunition. Extreme spreads were limited to the teens, and standard deviations ran in the mid single digits. G.A. Precision built the test rifle, and fiveshot groups under ½ MOA were common. The three 6mm Creedmoor loads that Copper Creek carries are: 105- grain Hornady BTHP, 105- grain Berger Hybrid and 115- grain DTAC.

Finding Copper Creek Cartridge Co. was a pleasant surprise, and we look forward to doing business with them in the future. If you have your eye on an exotic cartridge, or want some ammo loaded just for your rifle, their products are worth trying.

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Recommended Articles

See More Recommendations

Popular Videos

Guns & Ammo TV: 6.5 Creedmoor vs. .375 H&H

Guns & Ammo TV: 6.5 Creedmoor vs. .375 H&H

The 6.5 Creedmoor and the .375 H&H are almost complete opposites, or are they? The 6.5 Creedmoor is a newer and popular cartridge that transcends long-range precision rifle shooting and hunting big game. The .375 H&H is more than a century old, but still a popular and versatile choice for hunting big and dangerous game. For this shoot, Pro Tom Beckstrand, former U.S. Army Special Operations officer and sniper team leader, faces off against Guns & Ammo TV cameraman Ben LaLonde in a challenge that highlights the differences between these two cartridges.

Pocket-Pistol Carry Tips and Tricks

Pocket-Pistol Carry Tips and Tricks

Pocket carry, as a method of concealed carry for a defensive firearm, can be a practical option when done right. This is especially true during the colder months when heavy outer garments can obstruct access to a traditional waistline holster. Former U.S. Navy SEAL Jeff Gonzales, president of Trident Concepts, joins G&A contributor Kimberly Heath-Chudwin to discuss guns, training and gear, including Blackhawk's TecGrip holster that can make pocket carry more successful.

Cameras Don

Cameras Don't Lie: Subsonic 9mm vs. .300 Blackout

In this segment of "Cameras Don't Lie," a subsonic-ammo showdown, 9mm vs. .300 Blackout fired from AR rifles.

Umarex Air Ruger 10/22 Rifle Review

Umarex Air Ruger 10/22 Rifle Review

In this segment of "Guns & Ammo TV," Gun Tech Editor Richard Nance and Pro-Shooter Jim Tarr head to the range to wring out the Umarex Air Ruger 10/22.

See More Popular Videos

Trending Articles

Whether you're going hunting or to the range, hitting your target is more fun when you have a zeroed rifle scope. Here's how to sight in your rifle scope setup in five quick-and-easy steps.How to Sight In a Rifle Scope in 5 Steps How-To

How to Sight In a Rifle Scope in 5 Steps

Craig Boddington - June 04, 2018

Whether you're going hunting or to the range, hitting your target is more fun when you have a...

9 Commonly Misused Gun Terms How-To

9 Commonly Misused Gun Terms

Kyle Wintersteen

"Assault weapon." Sixteen-round "clip." A box of "bullets." When it comes to guns and gun...

Some guns are easier to work with than others, but the Ruger American Rifle doesn't require an engineering degree to tinker with; here's a look at some upgrade options to take your Ruger American to the next level, and make it something a bit different.Top Ruger American Rifle Upgrades Accessories

Top Ruger American Rifle Upgrades

Philip Massaro - March 15, 2018

Some guns are easier to work with than others, but the Ruger American Rifle doesn't require an...

The Taurus TX22 rimfire shoots like no other.Taurus TX22 Rimfire Review Reviews

Taurus TX22 Rimfire Review

Eric Poole - May 23, 2019

The Taurus TX22 rimfire shoots like no other.

See More Trending Articles

More Rifle

Guns & Ammo Rifles & Optics Editor Tom Beckstrand was on location in Idaho where he pushed the limits of the 5.56 NATO cartridge in this segment of “Long Range Tech” for Guns & Ammo TV.Guns & Ammo TV: Shooting 1,270 Yards with the 5.56 NATO Rifle

Guns & Ammo TV: Shooting 1,270 Yards with the 5.56 NATO

Guns & Ammo Staff - August 10, 2020

Guns & Ammo Rifles & Optics Editor Tom Beckstrand was on location in Idaho where he pushed the...

Hornady's 6mm Advanced Rifle Cartridge (ARC) is the first time in history that the commercial announcement of a cartridge was preceded by adoption within the military. While Hornady has been extremely secretive about who adopted the cartridge, they can say that it is a U.S. Military Adopts Hornady's New Cartridge: 6mm ARC Rifle

U.S. Military Adopts Hornady's New Cartridge: 6mm ARC

Tom Beckstrand - June 03, 2020

Hornady's 6mm Advanced Rifle Cartridge (ARC) is the first time in history that the commercial...

Economy ammunition will extend your range session, but what are the tradeoffs?Cheap Ammo Tradeoffs Rifle

Cheap Ammo Tradeoffs

Aaron Carter - May 15, 2020

Economy ammunition will extend your range session, but what are the tradeoffs?

For this shoot, Pro Tom Beckstrand, former U.S. Army Special Operations officer and sniper team leader, faces off against Guns & Ammo TV cameraman Ben LaLonde in a challenge that highlights the differences between the 6.5 Creedmoor vs. .375 H&H.Guns & Ammo TV: 6.5 Creedmoor vs. .375 H&H Rifle

Guns & Ammo TV: 6.5 Creedmoor vs. .375 H&H

Guns & Ammo Staff - June 17, 2020

For this shoot, Pro Tom Beckstrand, former U.S. Army Special Operations officer and sniper...

See More Rifle

Magazine Cover

GET THE MAGAZINE Subscribe & Save

Digital Now Included!

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE Arrow

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Phone Icon

Get Digital Access.

All Guns and Ammo subscribers now have digital access to their magazine content. This means you have the option to read your magazine on most popular phones and tablets.

To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine.

Get Digital Access

Not a Subscriber?
Subscribe Now