July 23rd, 2020

6mm ARC Cartridge — SAAMI Specs, Build Requirements, Videos

6mm ARC brownells bolts cartridge loaded ammunition 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.

CLICK Image for official SAAMI Specifications:
6mm ARC brownells bolts cartridge loaded ammunition hornady

If you are intrigued by the 6mm ARC, you’ll find the products you need at Brownells — uppers, barrels, bolts, and magazines. Brownells also sells Hornady-made 6mm ARC factory-loaded ammo, but most varieties are out-of-stock right now, as is the 6mm ARC brass. More brass and ammo should arrive soon. Midsouth is also taking brass/ammo backorders. For general information, see 6mm ARC Info Page.

What Is the 6mm ARC Cartridge?
6mm ARC brownells bolts cartridge loaded ammunition hornadyThe 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

For more INFO, see 6mm ARC Info Page.

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.

6mm ARC brownells bolts cartridge loaded ammunition hornady

6mm ARC Videos from Hornady (18 Total)

6mm ARC: Overview
6mm ARC: Handloading
6mm ARC Initial Offerings
6mm ARC: AR-15 vs AR-10
6mm ARC vs. 6.5 Grendel
6mm ARC vs the Creedmoors
6mm ARC: 6.5 Creedmoor of the Gas Gun World
6mm ARC vs 308 WIN
6mm ARC: How it started

6mm ARC: What is it
6mm ARC: Military Application
6mm ARC vs. 6.8 SPC
6mm ARC: Bolt Gun Application
6mm ARC: Cartridge Design
6mm ARC: Best AR-15 Cartridge
6mm ARC: Hunting
6mm ARC: Match
6mm ARC: Barrel Length


* 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.

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July 23rd, 2020

Congress Approves Great American Outdoors Act

Congress House representative Great American Outdoors Act

NSSF Applauds Congressional Passage of Great American Outdoors Act
NSSF, the trade association for the firearm industry, praised the U.S. House of Representatives’ bipartisan passage of H.R. 1957, the Great American Outdoors Act. This historic legislation is among the most meaningful legislative measures for sportsmen in recent decades. The bill now moves to President Donald Trump’s desk.

The Great American Outdoors Act will promote sustained wildlife conservation, public land hunting, and recreational shooting for current and future generations of hunters and sportsmen. The bipartisan legislation ensures full funding for the Land and Water Conservation Fund (LWCF) and addresses the maintenance backlog of public lands and water projects across the United States. Those projects include wildlife habitat conservation, road and trail repairs, and increased recreational access to public lands and waters. NSSF is confident that the legislation will be signed into law by President Trump who has previously expressed support for the bill.

Great American Outdoors Act Congress President trump
View from NRA Whittington Center. NRA photo.

“This will be a great example of a promise kept by the Trump Administration for America’s sportsmen and women”, said Lawrence G. Keane, NSSF Senior Vice President of Government Relations and Public Affairs and General Counsel. “Secretary David Bernhardt and U.S. Fish and Wildlife Service Director Aurelia Skipwith recognize that our nation’s public lands belong to all Americans and the Trump Administration delivered on the guarantee that those lands and waters are accessible to America’s conservation-minded hunters and recreational target shooters. Those men and women are the greatest stewards of our natural resources and this initiative to expand and open new opportunities will nurture the next generation to enjoy and preserve our national outdoor heritage.”

GAOA outdoors act hunting
Deer hunting photo courtesy SportsmansGuide.com.

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