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November 2nd, 2017

Criterion Barrels AR15 Ammo Accuracy Comparison

Criterion Barrels AR-15 AR16 ammo ammunition comparison test
To determine group sizes, Extreme Spread (center to center) and Average to Center measurements were calculated with OnTarget software.

Criterion Barrels has published an interesting Ammo Comparison Test, shooting seven (7) different varieties of .223 Rem ammunition out of an AR15 fitted with Criterion Barrel. Each ammo type was chronographed (10-shot string), then five-shot groups were shot at 100 yards. Along with handloads (69gr Sierra MK + Varget), six (6) types of commercial ammo were tested:

PREMIUM Type Ammo:
Federal Gold Medal Match (69gr SMK)
Creedmoor 75gr HPBT
Prime 77gr OTM (Open Tip Match)

BULK Type Ammo:
Federal American Eagle XM193 (55gr FMJ)
Wolf Gold (55gr FMJ)
Wolf Polyformance Steel Case (55gr FMJ)

The results are quite interesting. The Federal GMM actually shot the best, beating “untailored” handloads. Basic accurizing efforts and a much better rest set-up showed significant benefits with most ammo types (but not the bulk Wolf Ammo). As you would expect, the more expensive ammo shot best: “Chart 1.2 [below] showcases the average [after accurizing] five round group sizes with each type of ammunition at 100 yards, while Chart 1.3 lists the price per round of each ammunition type. It becomes immediately evident by reviewing these two graphs that there is an inverse relationship between group size and factory ammunition price.”

READ Full Criterion Barrels AR15 AMMO Comparison Test »

Criterion Barrels AR-15 AR16 ammo ammunition comparison test

Accurizing Improvements — Better Scope, Better Rests, Accu-Wedge
As you would expect, some basic accurizing efforts improved accuracy with the better ammo. The accurizing process included: 1) Swapping to a Vortex Viper PST Gen 1 6-24x50mm optic; 2) Adding an Accu-Wedge; 3) Improving fitment during reassembly, and 4) Switching from Harris bipod to a Sinclair Front Rest and Edgewood rear bag for added stability.

Criterion Barrels AR-15 AR16 ammo ammunition comparison test

If you shoot an AR15, or even shoot a .223 Rem bolt gun with factory ammo, you should probably read this test in full. Criterion put a lot of time into the testing, and experimented with a variety of AR options showcased in a series of YouTube videos. SEE: Accurizing the AR-15 Video Playlist.

READ Full Criterion Barrels AR15 AMMO Comparison Test »

Test Commentary by Criterion Barrels

“What kind of accuracy can I expect from my Criterion AR-15 barrel?”

It’s a fairly easy question to ask, but formulating an educated response can prove to be a very arduous task. While many barrel manufacturers will offer a 1 MOA guarantee with their products, very few explain what this 1 MOA group entails. Is it a three-round group, a five-round group, a 10-round group, or some other pre-determined quantity? Is it fired off of a bench rest, a bipod, or some other fixture? What ammunition should be used in this testing to verify 1 MOA capability?

In our recent “Accurizing the AR-15” video series we outlined a number of internal rifle build variables that come into play when it comes to AR-15 performance. Headspace, component selection, and assembly methods will all have an impact on group sizes.

While external variables such as the shooter and environmental conditions will also play a role in group size, there is one additional internal factor in rifle performance that we have not yet described in detail: Ammunition selection. All other factors considered, poor quality ammunition will likely be a limiting factor in high-performance rifle accuracy.

To put this theory to the test, we sourced six different types of factory ammunition and a hand load previously worked up for a different rifle build. That particular load recipe was not tailored to accommodate this specific rifle barrel. The results of tailoring a hand load to an individual rifle barrel will be outlined in a future article.

Prior to our “Accurizing the AR-15” video series we went about establishing a benchmark for how these seven different loads performed in our rifle build. These “Before” groups were fired off a rifle supported by a Harris bipod featuring a Vortex Viper PST Gen 1 2.5-10×32 FFP through our SPRECCE rifle build.

Improvements made prior to shooting the “After” groups include an optics swap (to a Vortex Viper PST Gen 1 6-24×50 SFP), the addition of an Accu-Wedge, improved fitment during reassembly, and a switch from a bipod to a Sinclair front benchrest assembly and Edgewood rear bag for added stability. Component and assembly details can be found in our recent YouTube video series.

The ammunition selected for this test varies widely in price and quality. Each load utilized in this article was tested with a Magnetospeed V3 chronograph for extreme spread (ES) and standard deviation (SD) over a ten-round course of fire.

Each individual load was also accuracy tested both before and after the rifle was accurized. Accuracy was tested by firing three groups of five rounds with each load from 100 yards, with time allotted to allow the barrel to cool between each string of fire.

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November 2nd, 2017

Theodore Roosevelt Collection at NRA Museum

Story by Lars Dalseide for NRAblog.
Back in 2012, the National Firearms Museum received a shipment from Sagamore Hill — the ancestral home of President Theodore Roosevelt. While Sagamore Hill undergoes renovation, the National Parks Service was kind enough to lend a portion of the estate’s collection to the NRA Museum. That collection was put on display under the exhibit named Trappings of an Icon.

“Basically it tells you about the life of Theodore Roosevelt,” explains Senior Curator Phil Schreier (in photo above in coat). “Hunter, Statesman, Soldier. In the first case we had two firearms from his hunting career. First an 1886 Winchester rifle known as the tennis match gun because he used winnings from a tennis match to purchase the gun.”

The second firearm on display was a suppressed Winchester model 1894 rifle. This was favorite of the President’s when clearing the grounds of the local, pesky critters. Schreier explains: “Archie Roosevelt wrote that his father liked to shoot varmints around Oyster Bay with this gun so he wouldn’t disturb the Tiffany and Du Pont families that lived near by.”

President Theodore Roosevelt was a strong supporter of marksmanship competitions. In fact President Theodore Roosevelt could be called a “founding father” of the NRA National Matches*. Teddy Roosevelt believed that, to assure peace, America needed to be prepared to fight. At the 2011 NRA National Championships, Dr. Joseph W. Westphal, Under Secretary of the U.S. Army, echoed the views of Roosevelt: “The first step in the direction of preparation to avert war, if possible, and to be fit for war, if it should come, is to teach men to shoot.”

Theodore Roosevelt also has a strong connection to the “President’s Match” fired every summer at Camp Perry. The President’s Match was patterned after an event for British Volunteers called the Queen’s Match started in 1860 by Queen Victoria and the NRA of Great Britain. The tradition of making a letter from the President of the United States the first prize began in 1904 when President Roosevelt personally wrote a letter of congratulations to the winner, Private Howard Gensch of the New Jersey National Guard.

*In February 1903, an amendment to the War Department Appropriations Bill established the National Board for the Promotion of Rifle Practice (NBPRP). This government advisory board became the predecessor to today’s Corporation for the Promotion of Rifle Practice and Firearms Safety, Inc. that now governs the Civilian Marksmanship Program (CMP). The 1903 legislation also established the National Matches, commissioned the National Trophy and provided funding to support the Matches. This historic legislation grew out of a desire to improve military marksmanship and national defense preparedness. President Theodore Roosevelt, Secretary of War Elihu Root and NRA President General Bird Spencer were among the most important supporters of this act.

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