.300 AAC Blackout for Deer?

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The AR-15 platform has been modified and fiddled with for quite a while, and has its own series of cartridges designed specifically to function within the parameters of the rifle. The 6.8 SPC, the .458 SOCOM, the .50 Beowulf; all were built to give the AR-15 a different level of performance than the standard 5.56 NATO/.223 Rem.

There is also no doubt that .30-caliber cartridges are, have been, and probably will remain America’s favorite. So many cartridges have been modified to hold .30-caliber bullets that I have almost lost count. The .300 AAC Blackout is the cartridge built to function in the AR-15 platform, and with its design comes a different mindset, as the cartridge is called upon to fill a special role.

As a hunting cartridge, the .300 BLK certainly doesn’t look like one of the usual suspects; it is a stubby little guy, definitely lacking the look of a long range cartridge. That’s fine, because the Blackout was never designed to fulfill that role. Perhaps a bit of history is warranted.

The Blackout’s roots are spread in the soil of the U.S. Military, which was looking for a round that would give better sub-sonic capabilities than the suppressed 9mm carbines, especially for close-in work. With some modification of a wildcat cartridge – namely the .300 Whisper—the .300 Blackout was delivered by Advanced Armament Corporation. The case itself can trace its roots all way back to the .222 Rem., through the .221 Fireball case. It was designed to fit in a standard 5.56mm AR-15 magazine in double-stack configuration, yet use the long 220-grain bullets for subsonic performance. The Blackout did just that—pushing those 220-grain slugs at 1010 fps—but also did very well with the lighter bullets. That short case will push the 125 and 130-grain bullets to a muzzle velocity of right around 2200 fps; certainly no speed demon, but enough to get the job done on military targets. It functions perfectly through the AR platform, with one caveat: the ammunition that uses the sleek ogive bullets will actually chamber in the .223/5.56mm rifles, and that can pose one helluva problem should the ammunition be confused. Please keep them separated; keep them further apart than you and your mother-in-law in order to prevent disaster.

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In the hunting fields, especially in the deer woods, the .300 BLK is an acceptable, if not overwhelming choice. If ranges are kept around 100 yards—much like the .30/30 WCF—things should go right for you. Were I using a Blackout on a deer hunt, I’d most definitely choose a premium hunting bullet in the 125- to 135-grain range, as they’ll give the proper terminal ballistics. Those heavy 220-grain slugs are simply moving too slow to give reliable expansion, and will more than likely whistle through like a solid, resulting in a wounded or lost animal. No one wants that to happen.

Ammunition choices are actually pretty broad. You’ll want to keep your hunting distances within reason, and choose a bullet that will expand reliably at the furthest distance you expect to take an animal with the Blackout—where that bullet will slow down. I’m not one of those guys who gets hung up on energy figures—where the commonly accepted figure of 1,000 ft.-lbs. to kill a deer came from, I don’t know—but you definitely need reliable expansion in order to kill effectively. Looking at just a few, Hornady loads the 135-grain FTX bullet at a muzzle velocity of 2,085 fps, and this will make a great hunting round. They also load their 110-grain GMX—an all-copper, polymer-tipped bullet—that will also get the job done well, again, providing you use it within sane ranges. Barnes builds their VOR-TX Blackout ammo around the 120-grain monometal TAC-TX bullet; Barnes worked very hard to deliver a bullet that is plenty accurate and yet gives good expansion and penetration.

The whitetail deer has suffered from guinea-pig status; I know hunters who seriously use calibers ranging from .17 Rem. all the way up to the .450 No.2 Nitro Express to make their venison, with varying levels of success. The whitetail is so prolific that—like feral hogs—sportsman tend to experiment with varying calibers and bullet weights. A good bullet, like that GMX or TAC-TX, at the lighter .30-caliber weights, will get the job done. Looking at the Blackout’s trajectory, you’ll want to limit the range to 100 or 125 yards. To obtain a 200-yard zero with the Hornady FTX load, you’ll need to be five inches high at 100, which is a bit drastic. Perhaps a 100-yard zero, or an inch high at 100, where you’d be in vitals at 125, makes more sense.

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So, is the Blackout the perfect deer cartridge? It’s no .308 Win., but I feel within 100 yards it’s a better choice than any .22-caliber centerfire. The choice is up to you, but if I were handed an accurate Blackout for a hunt in the woods of the northeast, I wouldn’t hesitate to use it, provided it was loaded with a good, sensible bullet.

300 blackout for deer inset .300 AAC Blackout for Deer?

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Ethan Smith is a seasoned marine veteran, professional blogger, witty and edgy writer, and an avid hunter. He spent a great deal of his childhood years around the Apache-Sitgreaves National Forest in Arizona. Watching active hunters practise their craft initiated him into the world of hunting and rubrics of outdoor life. He also honed his writing skills by sharing his outdoor experiences with fellow schoolmates through their high school’s magazine. Further along the way, the US Marine Corps got wind of his excellent combination of skills and sought to put them into good use by employing him as a combat correspondent. He now shares his income from this prestigious job with his wife and one kid. Read more >>