Testing Sig’s .300 Blackout Quick Barrel Loads :: Guns.com


Sig Sauer 300 BLK

The Sig Sauer BLK SbR Elite Copper Duty Ammo brings 120-grains to the table. (Photo: Josh Wayner)

Sig Sauer not too long ago released a new 300 Blackout ammo supplying for shooters hunting to elevate their quick barrel game. The 300 BLK SBR Elite Copper Duty Ammo aims to bring a lot more capabilities to AR shooters, delivering a new round created particularly for quick-barrel firearms. As some thing of an ammo guy, I wanted to bring the Guns.com readers an in-depth appear at the brand-new Sig Sauer 300 Blackout 120-grain Quick Barrel load.

Unpacking the Sig 300 Blackout

Although the box is reasonably unassuming, what lies inside is something but. The load is visually attractive and capabilities a lengthy, slender copper projectile, blackened brass, and a silver primer. The cartridges resemble classic Russian military ammo. As opposed to the old Soviet ammo, the Sig load is not lacquer coated.

Russian ammo instances had been traditionally created of steel and had a thin coating on them to permit for extraction and to lower put on on the gun. Sig’s opts for a brass case with a dark, non-reflective wash. This excellent is each desirable and distinct from other 300 Blackout ammunition.

Surprisingly, most makers do not make 300 BLK ammo for quick barrels regardless of the reality that most persons contemplate the cartridge to be devoted to quick pipes. This is the similar dilemma that exists with cartridges like .38 Specific. Eventually, this implies ballistics on the box are not usually what you get when you fire.

Sig Sauer 300 BLK

The ammo performed properly for the duration of testing, holding up against a range of targets. (Photo: Josh Wayner)

Understanding the 300 BLK needs forgetting all the things you know about rifle rounds. The round is in a class of its personal and is a lot more akin to 30 Carbine and .45 ACP than it is five.56mm, 308 Win or six.five Grendel, but it plays in the similar fields as the latter rifle rounds. The round reaches peak stress and velocity in only a couple of inches of travel in the barrel due to the rapid-burning magnum pistol powder it utilizes. This permits it to be chambered and made use of in barrels as quick as five-inches but also in barrels 3 occasions as lengthy or longer. The execution of the Sig 120-grain Quick Barrel load is extraordinary as it managed to tackle 3 hard issues completely — accuracy, velocity and bullet functionality.

Testing the 300 Blackout

Just for entertaining to test these loads out, I loaded them into Magpul PMAGs dyed to appear like the popular AK-74 bakelite mags so frequent in 1980’s action films. The gun made use of to test the Sig ammo sported a Faxon Firearms 7.five-inch barrel. This barrel is properly-made use of regardless of getting two years old and has observed roughly 10,000 rounds. I trust this barrel to provide accuracy as it has shown pretty small, if any, alter in group size for manage ammunition more than time. A manage load is handy as it gauges barrel functionality more than the life of the barrel. Handle ammo for this overview is handload featuring a 125-grain bullet and ready to match-grade requirements.

The load averaged two.five-inches at 100-yards for 50 rounds and ten groups, which to numerous is not impressive, but to me, it is pure gold. The 300 BLK is basically a pistol round that masquerades as a rifle round and behaves as such. The cartridge utilizes pistol powder and pistol ammo tolerances as far as accuracy is concerned. Extraction and ejection had been healthful with no Indicators of overpressure or primer separation.

The velocity of this round was calculated by means of an Oehler 35P chronograph. Sig’s box states a predicted velocity of 1,897 feet-per-second from a six.75-inch barrel. The 7.five-inch barrel I made use of generated a bit a lot more at two,010 fps. The mixture of the barrel made use of for this overview and the adjustable bleed-off gas block from Superlative Arms on the gun developed a more rapidly velocity. The regular deviation on this load was 51 fps for 20 rounds — superb for 300 BLK.

Sig Sauer 300 BLK

In bare gel, the lead cost-free monolithic copper bullets expanded reliably. (Photo: Josh Wayner)

When it came to bullet functionality, Sig did this 1 just correct. I tested the load against barriers, bone, and in gel. The lead-cost-free monolithic copper bullets performed with excellent repeatability in the mediums I tested it in. In bare gel, the bullets expanded reliably and passed completely by way of the 16-inch block from Clear Ballistics. Recovered projectiles maintained 99-% of their weight, but it is fair to say that they didn’t shed mass at all.

In bone and difficult mediums, the bullets tended to pass by way of devoid of expansion and then open up in the hiding behind. The recovered bullets had been pretty much indistinguishable from the ones fired into bare gel and did not show Indicators of material loss. Passing by way of bone yielded the occasional bullet that exited the gel absolutely, just plopping out on the other side possessing lost most their power.

Fianl Thoughts

The outcomes I obtained with this ammunition had been nothing at all quick of exceptional. I have a excellent deal of encounter with Sig Sauer ammunition and was pleased that they delivered right here exactly where so numerous other people have failed. Out of the 25,000 or a lot more rounds I have fired in the final numerous years, by way of a excellent numerous physical objects and barriers, I can honestly say that I was impressed with what Sig did right here. Do your self a favor and verify out the 120-grain 300 BLK Quick Barrel load for your self. You will be glad you did.

The Sig Sauer 300 BLK SBR Elite Copper Duty Ammo retails for $29.95 for a box of 20.


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