June 12th, 2018

AR-15 Accuracy with Factory Ammo — Surprising Results

Criterion Barrels AR-15 AR16 ammo ammunition comparison test
Displayed are results with Federal Gold Medal Match — quite impressive accuracy!

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)

Here are the results for the four best commercial ammo types tested: Federal Gold Medal Match (GMM) with 69gr SMK, Prime 77gr OTM, Creedmoor 75gr HPBT, and American Eagle XM193 (55gr FMJ). The Gold Medal Match shot the best of all factory ammo tested. In fact, the GMM even shot slightly better than the handloads, which averaged 0.79″ for the three accurized groups.

AR15 Factory Ammo testing

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. The same 1:8″-twist Criterion barrel was used throughout the testing process.

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.

Permalink - Videos, Bullets, Brass, Ammo, Tactical 3 Comments »
May 26th, 2017

NEW Federal Factory Ammo Loaded with Berger Bullets

Berger Bullets Gold Medal Berger Federal ammo ammunition 6.5 Grendel 6.5 Creedmoor PRS tactical .223 Rem .308 Win

This is a very interesting development. Federal will produce a line of Federal Gold Medal ammunition loaded with Berger Bullets match projectiles and GM Match primers. The new Gold Medal Berger ammo will initially be offered for: .223 Remington, 6.5 Grendel, 6.5 Creedmoor, and .308 Winchester. We expect this ammo to attract the attention of tactical and PRS shooters — Berger projectiles are currently favored by top PRS competitors. Depending on caliber, three different high-BC bullet types will be used: BT Target, Hybrid OTM, or Juggernaut OTM. These all feature a boat-tail design with a high BC for bullet weight. The 6.5 calibers will use Berger’s popular 130gr Berger Hybrid OTM bullet while the .308 Win uses the 185gr Juggernaut.

This new Gold Medal Berger ammo uses Federal Gold Medal match primers, Federal brass, and specially-formulated propellants. All the ammo is well under SAAMI-spec max OALs to function 100% in magazines. Federal says this ammo will “adhere to Federal Premium’s strictest specifications for accuracy, pressure and velocity”. This new GM Berger ammo line could be a match-worthy alternative for guys who don’t want to hand-load. We’re going to try some in 6.5 Creedmoor and see how it performs in terms of accuracy, ES/SD, ballistics, and temp stability. Should be an interesting test…

FEATURES of Gold Medal Berger Ammo:
• Most popular bullets at Precision Rifle Series events
• High ballistic coefficient
• Less wind drift and drop (than typical factory ammo)
• Excellent long-range accuracy
• Gold Medal match primer

Berger Bullets Gold Medal Berger Federal ammo ammunition 6.5 Grendel 6.5 Creedmoor PRS tactical .223 Rem .308 Win

Berger Bullets Gold Medal Berger Federal ammo ammunition 6.5 Grendel 6.5 Creedmoor PRS tactical .223 Rem .308 Win

Part No. / Description / MSRP
GM223BH73 / .223 Rem. 73-grain Berger BT Target / $32.95
GM65GDLBH130 / 6.5 Grendel 130-grain Berger Hybrid OTM / $34.95
GM65CRDBH130 / 6.5 Creedmoor 130-grain Berger Hybrid OTM / $34.95
GM308BH185 / .308 Win 185-grain Berger Juggernaut OTM / $34.95

Permalink Bullets, Brass, Ammo, New Product, Tactical No Comments »
September 11th, 2011

New Federal Gold Medal Match Primers for ARs

Federal Ammunition has released a new type of small rifle match primer optimized for AR15s and similar semi-automatic rifles. The new Gold Medal® AR Match Primers, designated GM205MAR, have harder primer cups than the popular Federal 205M match primers. The harder cup is designed to perform better in semi-automatic actions that use free-floating firing pins. A Federal spokesman said that Federal’s “normal” 205M primers were not ideal for use in firearms, such as ARs, with free floating firing pins. Hence Federal designed the new GM205MAR primers. These are available now from major vendors such as Midsouth Shooters Supply, which offers the new GM205MAR primers for $35.22 per thousand.

Federal AR Match Primers GM205MAR

Other AR-Friendly Primers
For quite some time, CCI has offered its #41 milspec small rifle primer for use in ARs. A CCI #41 primer is a ‘magnum’ strength primer, equivalent to the CCI 450 Small Magnum rifle primer. However, the #41 primer is made with a bigger gap between the tip of the anvil and the bottom of the cup, creating a slightly less sensitive primer. The #41 primer also has a thicker bottom on the cup than the CCI 400 primer.

Permalink Bullets, Brass, Ammo, New Product 1 Comment »
April 17th, 2011

Great Deal on Federal Gold Medal Match .308 — $20.00 per Box

Fed Gold Medal 308Experienced .308 shooters know that the 168gr Federal Gold Medal match ammunition often performs superbly in both factory and custom .308 Win rifles. We’ve seen this stuff shoot 1 MOA in an FN-FAL and close to half-MOA in a GAP tactical rifle. We won’t make any promises, but the reputation of this ammo speaks for itself. Right now, Champion Shooters Supply has Federal GM308M 168gr factory ammo for just $20.00 per box of 20 rounds. That’s 56% off Champion’s regular price, and way below what this ammo normally costs. Loaded with the 168gr Sierra MK BTHP bullet, this stuff is very high grade ammo at a very attractive price. NOTE: If you want it, order soon. Champion states: “Sale Supply is limited, once we run out we cannot continue this special price.”

Fed Gold Medal 308

Story sourced by Edlongrange.
Permalink Bullets, Brass, Ammo, Hot Deals 2 Comments »