{"id":21558,"date":"2014-07-10T12:10:53","date_gmt":"2014-07-10T16:10:53","guid":{"rendered":"http:\/\/www.gunsamerica.com\/blog\/?p=21558"},"modified":"2025-11-07T05:36:54","modified_gmt":"2025-11-07T11:36:54","slug":"300-aac-blackout-fundementals-ammunition-reloading","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/300-aac-blackout-fundementals-ammunition-reloading\/","title":{"rendered":"300 AAC Blackout Fundementals – Ammunition and Reloading"},"content":{"rendered":"
\"300<\/a>

For all testing, I used the same rifle – this Daniel Defense DDM4v5 300 AAC Blackout equipped with a SilencerCo \/ SWR Specwar 762 suppressor. It\u2019s shown here with a Weaver Kaspa-Z optic.<\/p><\/div>\n

Recently when I wrote a review of the Daniel Defense DDM4v5 300 Blackout rifle<\/a>, I mentioned that I\u2019d be doing a drill down series on different aspects of the 300 AAC Blackout. Well, it starts here.<\/p>\n

Love it or hate it, the 300 AAC Blackout is an interesting and incredibly diverse cartridge. Imagine trying to design a ballistic compensation scope for a cartridge that can use 110 grain projectiles traveling at 2,400 feet per second AND 245 grain projectiles traveling at 950 feet per second. That last one is somewhat like throwing a brick with much vigor.<\/p>\n

This is going to be fun. Let\u2019s dig in with some talk about the cartridge, basic ballistics and reloading for the 300 AAC Blackout<\/a>.<\/p>\n

\"300<\/a>

Celebrate diversity! 125, 245 and 220 grain projectiles, left to right. A 55 grain .223 Remington load is shown on the far left for scale.<\/p><\/div>\n

The physics \u2019n math stuff<\/h2>\n

I\u2019m a professional goofball, so I never really got physics. I made it through, but I never really understood concepts like acceleration, momentum and why mass is different than weight. So when it comes to looking at cartridge energy and recoil figures, I always rely on my friend Andrew Chamberlain. He apparently did get physics and he really likes guns. He likes both topics so much that he wrote the Cartridge Comparison Guide. In that book, you can compare pretty much anything about any cartridge to anything else about any other cartridge. If you\u2019re a gun geek, get a copy!<\/p>\n

If you do a rough comparison of muzzle energy of the 300 AAC Blackout to the 7.62×39 (AK-47) round, you\u2019ll see a slight edge to the AK with a 100 grain bullet. The 110 grain Blackout at 2,375 feet per second yields 1,377.4 foot-pounds of muzzle energy to the AK\u2019s 1,650.8 at 2,600 feet per second. When it comes to recoil energy, assuming you’re using an 8 pound rifle, the Blackout hits you less with 4.3 foot-pounds compared to the AK\u2019s 6.34 foot-pounds.<\/p>\n

But the 300 AAC Blackout isn\u2019t supposed to compete directly with the AK. It\u2019s supposed to offer a .30 caliber alternative with more short barrel terminal performance than the .223 Remington<\/a> round. If you look at the \u201cstandard\u201d 55 grain .223 Remington at 3,240 feet per second, that yields 1,281.8 foot-pounds of muzzle energy and 3.16 foot-pounds of recoil energy. And the Blackout makes a bigger hole.<\/p>\n

\"300<\/a>

I used the Leupold Mark 4 MR\/T 1.5-5×20 scope for all accuracy testing. It features a calibrated ballistic compensation reticle for supersonic and subsonic rounds. It\u2019s a great option for a 300 Blackout rifle.<\/p><\/div>\n

Shoots flat enough OR like a brick!<\/h2>\n

We\u2019ve already hinted at the incredibly broad range of bullet weight and velocity that can be successfully fired from the same gun. Want supersonic? No problem. Buy some 100 or 125 grain ammo that will move along at up to 2,400 feet per second. Feel like something more moderate? No problem. .30 caliber bullets are available in all weights. You can get something in the 150 to 168 grain range that will move in the 1,700 to 2,000 feet per second range. Or you can get crazy and go full subsonic from the same AR platform rifle. How about a 208, 220 or even 245 grain projectile moving at 1,000 feet per second or less?<\/p>\n

Of course, all of these options will have incredibly diverse trajectories, and that\u2019s what gives scope makers fits over the 300 AAC Blackout. We\u2019ll talk about that in detail next week. For now, let\u2019s just look at bullet drop. We’ll consider scope adjustment for a 50 yard zero range using an optic that is 2.5 inches above the bore.<\/p>\n

On the supersonic side, let\u2019s compare bullet drop of a \u201c300 Blackout specific\u201d projectile like the Barnes TAC-TX 110 grain bullet to a 55 grain .223 Remington projectile traveling at 3,240 feet per second.<\/p>\n

300 AAC Blackout 110 Grain Barnes TAC-TX, 2,350 fps\u00a0\u00a0 \u00a0.223 Remington 55 grain, 3,100 fps<\/strong><\/p>\n

100 yards\u00a0\u00a0 \u00a0+0.73\u00a0\u00a0 \u00a0+1.57<\/strong>
\n200 yards\u00a0\u00a0 \u00a0-4.18\u00a0\u00a0 \u00a0+1.43<\/strong>
\n300 yards\u00a0\u00a0 \u00a0-19.77\u00a0\u00a0 \u00a0-4.16<\/strong>
\n400 yards\u00a0\u00a0 \u00a0-49.55\u00a0\u00a0 \u00a0-16.87<\/strong>
\n500 yards\u00a0\u00a0 \u00a0-98.14\u00a0\u00a0 \u00a0-39.06<\/strong><\/p>\n

When it comes to subsonic performance, the 300 AAC Blackout has no direct competitor. Like I said, it\u2019s a thrown brick. But it\u2019s insanely cool, quiet and useful at ranges of 100 yards or less. If you look at the trajectory of a 220 grain Sierra MatchKing fired at 1,023 feet per second, also zeroed at 50 yards, you\u2019ll see the following.<\/p>\n

300 AAC Blackout 220 Grain Sierra MatchKing, 2,350 fps<\/strong><\/p>\n

100 yards\u00a0\u00a0 \u00a0-6.09<\/strong>
\n150 yards\u00a0\u00a0 \u00a0-21.06<\/strong>
\n200 yards\u00a0\u00a0 \u00a0-45.21<\/strong>
\n500 yards\u00a0\u00a0 \u00a0-399.13<\/strong><\/p>\n

Clearly the subsonic loadings are not intended for long range use, although it might serve as an exceptionally lightweight mortar.<\/p>\n

\"300<\/a>

Some of the powders I\u2019ve used in both super and subsonic 300 AAC Blackout loads. The one missing from this photo is Accurate 1680 which is an excellent all around solution for 300 Blackout.<\/p><\/div>\n

Adventures in reloading!<\/h2>\n

If you reload ammunition, getting a 300 AAC Blackout rifle may very well ruin your family life. There\u2019s entirely too much tinkering potential. With the broad range of bullet weights and velocities, you may never settle on your own standard load.<\/p>\n

I\u2019ve only recently started tinkering with 300 Blackout loads and have already loaded and tested over 40 different projectile, powder and charge combinations, and I\u2019m just getting started.<\/p>\n

To narrow things down, lets talk about ideal projectiles and powders. First, you need to find projectiles compatible with .223 magazines. The ribs on .223 magazines are sized to support the necks on .223 \/ 5.56mm cartridge cases. Since the 300 AAC Blackout uses a cut down case, the ribs will be supporting the bullet itself, so the projectile has to be consistent with the expected dimensions, else feeding reliability will suffer.<\/p>\n

Generally speaking, long, pointy bullets seem to work best. If the bullets are too short, feeding can be problematic. If they are too large in diameter at the position of the magazine ribs, feeding can also be impacted.<\/p>\n

\"300<\/a>

This Barnes TAC-TX 110 grain projectile is made specifically for 300 AAC Blackout. Not the long skinny profile for magazine feeding reliability.<\/p><\/div>\n

The Barnes TAC-TX is a perfect example of a projectile designed specifically for the 300 AAC Blackout. It\u2019s on the lighter side of the range of 300 AAC Blackout bullets, so it\u2019s intended for the higher end supersonic performance. I\u2019ve also has near perfect success with Sierra MatchKing bullets in 125 and 135 grain weights. 125 grain Nosler Ballistic Tips and 125 grain Hornady SST bullets are also a great 300 Blackout solution.<\/p>\n

In terms of powder choices, you\u2019ll use powders in the faster half of the burn rate spectrum, like H110, Lil Gun, Accurate 1680 and IMR 4227. Fortunately, most of these are readily available. Accurate 1680 seems to the best option for subsonic loads as it creates more gas volume for reliable cycling. Unfortunately, that’s the one near impossible to find recently.<\/p>\n

Brass availability depends on your desire to be industrious. By design, the cartridge case is identical to that at the .223 Remington, with the exception of being trimmed to a shorter length and reshaped to fit the .30 caliber bullet. You can buy ready-to-go 300 Blackout brass or you can make your own from .223 brass. The process is too much to go into here, but it\u2019s not that big a deal.<\/p>\n

\"300<\/a>

Here\u2019s another good all around bullet for 300 AAC Blackout. The 125 grain Nosler Ballistic Tip is a great hunting round and performed very well in numerous loads for accuracy.<\/p><\/div>\n

Accuracy and velocity tinkering<\/h2>\n

Tinkering is the key word here, as performing a methodical approach to determine the most accurate combinations of loads would take centuries. Do the math to calculate the total number of combinations of:<\/p>\n

\u2022\u00a0\u00a0 \u00a0A half dozen primer types
\n\u2022\u00a0\u00a0 \u00a0A half dozen powder types
\n\u2022\u00a0\u00a0\u00a0 10 or 12 powder quantities for each type of powder
\n\u2022\u00a0\u00a0 \u00a0A couple of dozen projectile weights
\n\u2022\u00a0\u00a0 \u00a0Minute variations in bullet seating depth<\/p>\n

Let’s see… dozens, times dozens, times dozens carry the one… I count 17 billion load combinations required to do a full velocity and accuracy analysis. That wasn’t feasible in my time frame, plus in have a short attention span, so I made a bunch of loads with somewhat impulsive combinations of bullets, powder and charge. I used CCI 400 small rifle primers for all of them to cut out at least one variable. Here’s what I found.<\/p>\n

\"300<\/a>

Considering how the subsonic bullets are lobbed rather than fired, one of the accuracy surprised was this 220 grain Sierra MatchKing load. Just over 1 inch at 100 yards!<\/p><\/div>\n

But first, NEVER, EVER, EVER RELY ON LOAD DATA FROM SECONDHAND SOURCES LIKE THIS ARTICLE. Only use load data from a printed manual from a reputable manufacturer. I’m only sharing this load information here for illustrative purposes to point out the diversity of the 300 AAC Blackout. I can’t be responsible for typos or other errors here. When reloading, always obtain your load data directly from the source. Safety first folks!<\/p>\n

All groups in the table below reflect 3 shots and are shown in minutes of angle. If you’re not familiar with that, a minute of angle is just over one inch at 100 yards, so, for example, 1.5 MOA is just about a 1.5 inch group at 100 yards.<\/p>\n

For the testing rifle, I used a Daniel Defense DDM4v5 300 AAC Blackout. I reviewed this rifle at the beginning of this series – you can read about it here. I used a Leupold Mark 4 MR\/T 1.5-5x20mm optic for all accuracy testing.<\/p>\n

Projectile\u00a0\u00a0 \u00a0Powder\u00a0\u00a0 \u00a0Charge (grains)\u00a0\u00a0 \u00a0Average Velocity (feet per second)\u00a0\u00a0 \u00a0Group size, MOA<\/strong>
\n110 grain Barnes TAC-TX\u00a0\u00a0 \u00a0H110\u00a0\u00a0 \u00a019.5\u00a0\u00a0 \u00a02,377\u00a0\u00a0 \u00a01.0<\/strong>
\n125 graIn Sierra MatchKing\u00a0\u00a0 \u00a0H110\u00a0\u00a0 \u00a018.0\u00a0\u00a0 \u00a02,146\u00a0\u00a0 \u00a00.94<\/strong>
\n125 grain Nosler Ballistic Tip\u00a0\u00a0 \u00a0IMR 4227\u00a0\u00a0 \u00a017.5\u00a0\u00a0 \u00a01,971\u00a0\u00a0 \u00a01.42<\/strong>
\n125 grain Hornady SST\u00a0\u00a0 \u00a0IMR 4227\u00a0\u00a0 \u00a018.3\u00a0\u00a0 \u00a02,085\u00a0\u00a0 \u00a01.3<\/strong>
\n125 grain Nosler Ballistic Tip\u00a0\u00a0 \u00a0H110\u00a0\u00a0 \u00a017.5\u00a0\u00a0 \u00a02,150\u00a0\u00a0 \u00a01.37<\/strong>
\n125 grain Nosler Ballistic Tip\u00a0\u00a0 \u00a0Lil\u2019 Gun\u00a0\u00a0 \u00a017.5\u00a0\u00a0 \u00a02,198\u00a0\u00a0 \u00a01.74<\/strong>
\n135 Grain Sierra MatchKing\u00a0\u00a0 \u00a0H110\u00a0\u00a0 \u00a018.2\u00a0\u00a0 \u00a02,135\u00a0\u00a0 \u00a01.12<\/strong>
\n135 Grain Sierra MatchKing\u00a0\u00a0 \u00a0IMR 4227\u00a0\u00a0 \u00a018.3\u00a0\u00a0 \u00a02,075\u00a0\u00a0 \u00a0N\/A<\/strong>
\n135 Grain Sierra MatchKing\u00a0\u00a0 \u00a0Lil\u2019 Gun\u00a0\u00a0 \u00a017.5\u00a0\u00a0 \u00a02,093\u00a0\u00a0 \u00a01.42<\/strong>
\n150 grain Sierra MatchKing\u00a0\u00a0 \u00a0Lil\u2019 Gun\u00a0\u00a0 \u00a016.0\u00a0\u00a0 \u00a01,922\u00a0\u00a0 \u00a01.86<\/strong>
\n168 grain Sierra MatchKing\u00a0\u00a0 \u00a0Lil\u2019 Gun\u00a0\u00a0 \u00a014.8\u00a0\u00a0 \u00a01,799\u00a0\u00a0 \u00a01.56<\/strong>
\n220 grain Sierra Matchking\u00a0\u00a0 \u00a0Lil\u2019 Gun\u00a0\u00a0 \u00a09.0\u00a0\u00a0 \u00a01,149\u00a0\u00a0 \u00a01.1<\/strong>
\n245 grain lead RNFP\u00a0\u00a0 \u00a0IMR 4227\u00a0\u00a0 \u00a08.8\u00a0\u00a0 \u00a01,033\u00a0\u00a0 \u00a0N\/A<\/strong>
\n245 grain lead RNFP\u00a0\u00a0 \u00a0H110\u00a0\u00a0 \u00a08.6\u00a0\u00a0 \u00a01,107\u00a0\u00a0 \u00a0N\/A<\/strong><\/p>\n

\"300<\/a>

The 125 grain Hornady SST offered flawless feeding and good accuracy with the loads tested so far.<\/p><\/div>\n

Just for kicks, I tested a few factory loads for velocity and accuracy too:<\/p>\n

Load\u00a0\u00a0 \u00a0Velocity (feet per second)\u00a0\u00a0 \u00a0Accuracy (MOA)<\/strong>
\n110 grain Hornady V-MAX\u00a0\u00a0 \u00a02,435\u00a0\u00a0 \u00a02.45<\/strong>
\n208 grain Gorilla Ammunition (A-MAX) \u00a0\u00a0 1,038\u00a0\u00a0 \u00a01.52<\/strong>
\n245 grain Cooper Cartridge Hard Cast\u00a0\u00a0\u00a0 1,058\u00a0\u00a0 \u00a0N\/A<\/strong><\/p>\n

As you can see, you could spend the rest of your life testing different iterations within this caliber. I didn\u2019t do any type of formal ladder testing with powder charge increments and I didn\u2019t even get into varying primer types and seating depth.<\/p>\n

\"300<\/a>

The 125 and 135 grain Sierra MatchKing bullets gave excellent accuracy performance. I tried the 110 grain Sierra Varminter hollow point just for fun, but the short profile gave me feeding problems in a couple of loads.<\/p><\/div>\n

The bottom line<\/h2>\n

One of the biggest complaints about the 300 AAC Blackout cartridge is the cost and limited availability of factory ammunition. It\u2019s more expensive than .223 \/ 5.56mm and much harder to find. I get that. But I also don\u2019t see the 300 AAC Blackout as an either \/ or replacement for .223. It\u2019s a different caliber with its own merits.<\/p>\n

On the other hand, if you\u2019re a reloader, it\u2019s a tinkerer’s paradise. If you get crafty and learn how to cut down your own brass from .223 Remington cases, you have an infinite supply of cheap brass. Projectiles are also readily available as .308 inch diameter bullets are used in all sorts of rifles.<\/p>\n

The bottom line? Celebrate diversity and try it out! We have more to come on the 300, so stay tuned.<\/p>\n","protected":false},"excerpt":{"rendered":"

Love it or hate it, the 300 AAC Blackout is an interesting and incredibly diverse cartridge. Imagine trying to design a ballistic compensation scope for a cartridge that can use 110 grain projectiles traveling at 2,400 feet per second AND 245 grain projectiles traveling at 950 feet per second. Reloading is just as challenging. <\/p>\n","protected":false},"author":25,"featured_media":21563,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"","footnotes":""},"categories":[1220,1258,18,4321,1217,209,1],"tags":[132,217,618,620],"featured":[],"hunt365":[4089],"class_list":{"0":"post-21558","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-huntgear","8":"category-ammo","9":"category-hunting","10":"category-guns","11":"category-hunt365","12":"category-tom-mchale","13":"category-uncategorized","14":"tag-buzz","15":"tag-featured-article","16":"tag-reloading","17":"tag-tactical","18":"hunt365-hunting"},"yoast_head":"\n300 blackout reloading<\/title>\n<meta name=\"description\" content=\"Looking to get the best performance from your 300 Blackout rifle? Consider reloading. 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