The rifle cartridges come in various signs and shapes with designs optimized for different shooting purposes. Therefore choosing high-quality and suitable ammo for your gun and purpose is critical.

Among hundreds of cartridge brands and products, the 300 Blackout and 7,62×39 have built their reputation with exemplary performance and qualities.

If you have narrowed your decision to these two products, don’t skip this post.

I will compare and highlight the core differences between 300 Blackout vs. 7.62×39 to help you pick the most optimal ammo.

Let’s get right into the details!

300 Blackout Vs. 7.62×39: What Are The Differences? 

The 7,62×39 possesses a long history since it was introduced in World War 2 and became prevalent ammo for the AK47. Meanwhile, the 300 BlackOut is a newer invention that showed up in the year 2010.

Though these two cartridges perform pretty similarly regarding real-life shooting and design, there are still some significant differences.

Before moving on to the details, let’s first look at their general specs side by side.

Comparison Table

Features 7.62×39 300 Blackout
Bullet Diameter 0,3111 or 0.310 inches 0,308 inches
Parent Casing Unique design 300 Whisper
Neck Diameter 0,339 inches 0,334 inches
Rim Diameter 0,447 inches (11,37 mm) 0,378 inches (9,6 mm)
Case Length 1,528 inches (38,81 mm) 1,368 inches (34,7 mm)
Case Capacity 27,7 gr (H2O) 19,2 gr (H2O)
Overall Length 2,2 inches (55,88 mm) 2,26 inches (57,4 mm)
Max Pressure 45,000 psi 55,000 psi

Overview And Specs

Although the two cartridges belong to the 0,30 caliber category, they don’t feature the same diameter and size.

At a close look, they possess nearly identical bullet size and overall length.

However, the 300 Blackout is slightly longer than the 7,62×39 with 2,26 inches compared to 2,2 inches of its counterpart. Meanwhile, the 7,62×39 possesses a thicker and slightly longer case with 0,339 inches in neck diameter.

Another significant difference lies in the case capacity of the two cartridges, with the 7,62×39 having a much larger CC than its counterpart (27,7 gr to 19,2 gr).

However, this difference doesn’t decrease the performance of 300 Blackout due to its advanced design, which I will discuss further in the following sections.

Last but not least, the maximum load pressure of the 300 BLK is also higher.

So that’s the core difference regarding cartridge size and specs. Scroll down to the next section, and I will show you how they perform in the real-life shooting.

The 300 Blackout Pellets 
The 300 Blackout Pellets


In general, the 7,62×39 will generate higher recoil power due to its higher load capacity. The measured recoil power of the 7,62×39 cartridge is 8.5 fps, while the number for the 300 Blackout stands at only 6-foot pounds.

A 20% difference in recoil power is definitely noticeable since these two cartridges give a pretty smooth and mild shooting experience. So, if you prefer a robust and powerful shot with more recoil force, the 7,62×39 is ideal.


The trajectory is the flying path of the bullets once they leave the gun barrels.

Commonly, the bullet will drop a few inches when shooting at a long distance due to the effect of gravity.

If the bullet drops too much, it will affect your shooting accuracy and increase the chance of missing the target. Therefore the flatter the trajectory, the better.

In addition, a flatter trajectory also reduces the traveling time and distance of bullets. Through real-life testing, I noticed that the 7.62×39 delivers a flatter bullet trajectory with a 44-inch drop.

Meanwhile, the 300 Blackout dropped up to 68 inches, which is 50% higher than the 7.62×39. Though you may think it’s insignificant, it makes a huge improvement at long-range shooting distance.

Ballistic Coefficient

If you don’t know, the ballistic coefficient is a general term used for measuring the ability of ammo to resist environmental impacts like air or wind.

This measure is important because the wind can affect the bullet’s trajectory and decrease its accuracy.

A cartridge with high BC can travel in a flatter trajectory in windy conditions.

There are two factors that decide the BC of one cartridge: its weight and momentum. The heavier the bullet, the higher the shooting momentum and vice versa.

For this reason, the 300 Blackout is the winner as it features heavier weight in general. The 300 Blackout’s BC measured in real shooting tests stands at 0,35 on average. Meanwhile, the figure for the 7.62×39 is only 0,25.

Therefore, the 300 Backout is the better option for shooting or hunting in windy conditions.

The 7.62x39 Pellets
The 7.62×39 Pellets

Sectional Density

Sectional density is the technical term referring to the penetration capacity or damages a pellet can generate when it hits the target. This factor is very critical for hunters, who need high penetration to hunt more efficiently.

If you just participate in shooting competitions where damage is not a criterion, then you can skip this number. In general, the design of the cartridge plays a critical part in its damage or SD.

Through a real shooting test, I measured that the SD of the 300 Blackout is 0,21.

Meanwhile, the figure for the 7,62×39 is slightly lower, standing at 0,18. For this reason, 300 Blackout is the winner regarding damage and penetration.

Hunting And Home Defense

It depends on that type of target and your specific needs. For example, suppose you hunt animals with thick skin and bone at a close distance.

In that case, the 300 Blackout is the better option due to its greater damage and penetration capacity.

However, if you hunt the bird or small targets at a long distance, then accuracy is the priority. In this case, the 7,62×39 is ideal with a flatter traveling trajectory, making it easier to aim and handle.

The same is true for home defense. Whether it’s precision or damage, it boils down to your priority. Nevertheless, both cartridges deliver lethal damage, and they make a good option for home defense.

The 7.62x39 Gives Higher Accuracy
The 7.62×39 Gives Higher Accuracy

Availability And Price

The average price of a 7.62×39 round on the market is $0,36.

Meanwhile, a 300 Blackout pellet costs up to 1$, which is nearly three times higher than the 7.62×39’s price.

The premium 300 Blackout versions may cost around $1.5 to $2. Therefore, the 7.62×39 is undoubtedly a more affordable option for beginners.

If you need further comparisons between these two cartridges, consider watching the video below.

Final Verdict: Which Is The Better Armo Between 300 Blackout Vs. 7.62×39? 

It’s pretty apparent that the 7.62×39 is a more suitable cartridge for beginners and regular shooters. It has a much lower price and a flatter traveling trajectory, and lower recoil.

Therefore, it’s easier to handle and is better for shooting competitions or leisure shooting. Meanwhile, the 300 Blackout offers greater penetration capacity and power with higher ballistic capabilities.

It’s ideal for hunters or those looking for a powerful shooting experience. If possible, I recommend you try out both these two cartridges to make the wisest decision. Thank you for reading!

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