Same Platform. Same Powder. Same Barrel Length. No Excuses.

If you’ve spent any time on firearm forums or social media, you’ve seen the debate.

Which is the better medium-range cartridge: the legendary 7.62×39 Russian or the modern .300 Blackout?

For this test, I wanted to remove as many variables as possible and let the data speak for itself.

Instead of comparing different rifle manufacturers, different barrel lengths, or factory ammunition loaded by different companies, I leveled the playing field.

Both cartridges were tested using premium SIG Sauer rifles with 16 inch barrels:

• SIG Spear chambered in 7.62×39
• SIG MCX chambered in .300 Blackout

Both are outstanding rifle platforms with excellent barrels, triggers, and overall build quality. If there was ever a fair comparison between these two cartridges, this was it.

Even the ammunition was loaded under nearly identical conditions.

• 7.62×39: 123gr Nosler Ballistic Tip
• .300 Blackout: 125gr Sierra GameKing HP 
• Powder: Accurate 1680 (A1680) 300 Blkout 20.8gr COAL 2.255 – 7.62×39 25gr COAL 2.195 – These loads proved safe in my rifles and were chosen to mimick factory velocities, verified across two reloading manuals.
• Handloaded by me for consistency

The goal wasn’t to crown a favorite before shooting.

The goal was simple…

Find out which cartridge truly performs better from 0 to 300 yards.

Test Conditions

• Rifle Barrels: 16 inches
• Zero: 100 yards
• Temperature: 84°F
• Elevation: 810 feet
• Handloaded ammunition
• Same powder (A1680)
• Similar bullet weights
• Premium SIG Sauer rifle platforms

By controlling these variables, the comparison becomes about the cartridges not the rifles. No more conversation about the versatility of 300Blkout of same bolt pattern with 5.56 and no more generalization of the accuracy potential of AK47 style rifles.

Velocity: Where the Story Begins

One thing became immediately obvious over the chronograph.

The 7.62×39 simply runs faster.

Average Velocities

• 7.62×39: 2,426 fps
• .300 Blackout: 2,033 fps

That nearly 400 fps advantage has consequences that show up throughout the rest of the test.

Higher velocity generally means:

• Flatter trajectory
• More retained energy
• Less wind drift
• Greater effective range before holdovers become significant

But speed alone doesn’t win.

Accuracy on target matters just as much.

Energy Comparison

The numbers tell an interesting story.

Looking at retained energy:

The 7.62×39 maintains roughly 40% more energy across the entire distance tested.

That’s significant if you’re evaluating cartridges for hunting or steel targets where impact energy matters.

Trajectory Comparison

The flatter trajectory of the 7.62×39 was exactly what the chronograph suggested.

At 300 yards:

• 7.62×39: -29.7 inches
• .300 Blackout: -42.1 inches

That’s over one foot of additional drop for the .300 Blackout.

Inside 150 yards, both cartridges are very manageable.

Past 200 yards, the difference becomes increasingly noticeable.

For shooters stretching to 300 yards, the 7.62×39 simply requires less elevation correction.

Accuracy Matters More Than Velocity

Velocity charts are fun.

Trajectory charts are useful.

But the real question is always:

Can you hit what you’re aiming at?

One advantage of using two premium SIG Sauer rifles was knowing neither rifle was holding the ammunition back.

Both platforms are capable of excellent precision.

Using carefully developed handloads with A1680 powder and premium hunting bullets for this comparison was a step further to leveling the playing field.

The result?

Both cartridges demonstrated the accuracy expected from quality rifles and carefully assembled handloads.

The deciding factor wasn’t whether either cartridge could shoot accurately.

It was how much velocity, energy, and trajectory seperated them across the course of fire of medium range 0 – 300 yards.

Where the .300 Blackout Still Shines

Despite losing this particular comparison on paper by points on target 156 vs 166, the .300 Blackout remains one of the most versatile cartridges available.

Its strengths include:

• Outstanding suppressed performance
• Reliable cycling with subsonic ammunition
• Short-barrel efficiency
• Compact rifle applications
• Excellent close-range hunting performance

The cartridge was never designed to outrun the 7.62×39.

It was designed to excel in a different role.

Why the 7.62×39 Continues to Impress

The 7.62×39 has been proving itself for decades.

In a quality modern rifle with carefully assembled handloads, it becomes far more capable than many shooters realize.

During this comparison it offered:

• Higher velocity
• More retained energy
• Flatter trajectory
• Better medium-range performance
• Excellent practical accuracy

The combination of modern bullets like the 123gr Nosler Ballistic Tip and carefully tuned handloads allows the cartridge to perform well beyond its military roots.

Final But Not So Final Verdict: Which Cartridge Wins from 0-300 Yards?

If your priority is suppressed shooting, compact carbines, or subsonic performance, the .300 Blackout remains one of the best choices available.

However…

If your goal is maximum performance from a 16-inch rifle between 0 and 300 yards, this test clearly favors the 7.62×39 Russian.

With nearly 400 fps more velocity, substantially higher retained energy, and over 12 inches less drop at 300 yards, the 7.62×39 demonstrated why it continues to be one of the best medium-range cartridges available when paired with quality components and modern rifles.

The beauty of this comparison wasn’t proving one cartridge is “bad.”

Far from it.

It was about removing the myths, controlling the variables, and letting the chronograph and targets tell the story.

Sometimes, the brass facts speak louder than internet opinions.

This Is Not the Final Verdict

Before the comment section explodes, let me be clear:

This test is not the final verdict on 7.62×39 vs .300 Blackout.

What we tested here was a very specific scenario:

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  16-inch rifles

  
  
  
  
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  Supersonic handloads

  
  
  
  
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  Similar bullet weights

  
  
  
  
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  The same powder (A1680)

  
  
  
  
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  The same premium SIG Sauer platform

  
  
  
  

That gives us an exceptionally fair comparison of supersonic medium-range performance from 0-300 yards.

But the .300 Blackout was never designed solely as a supersonic 300 yard cartridge. Its reputation was built around subsonic performance, suppression, and short barrel efficiency.

That is why a second phase of this project is already in development.

The Next Test: Subsonic vs Subsonic

I am currently developing dedicated subsonic loads for both cartridges, and the results could change the conversation dramatically.

Planned testing includes:

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  Subsonic .300 Blackout

  
  
  
  
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  Subsonic 7.62×39

  
  
  
  
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  Chronograph data

  
  
  
  
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  Accuracy at 100

  
  

  Reliability testing

  
  
  
  
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  Possibly full suppressed testing on both SIG platforms

  
  
  
  

This is where things get really interesting.

Many shooters assume the .300 Blackout automatically dominates the suppressed category, but modern heavy-bullet 7.62×39 loads may surprise people when paired with the right barrel, gas system, and suppressor.

Why This Matters

A cartridge that wins at 300 yards supersonic may not be the cartridge that wins at 100 yards suppressed.

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  7.62×39 currently leads in velocity, energy, and trajectory.

  
  
  
  
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  .300 Blackout may lead in suppression, subsonic efficiency, and overall sound performance.

  
  
  
  

So rather than declaring a universal winner, this article establishes the first piece of the puzzle:

The upcoming subsonic and suppressed phase may tell a very different story and honestly, that is the comparison I am most excited to shoot.

Stay tuned to Dayattherange.com and @Dayattherange on YouTube, because the next chapter of this cartridge showdown is already on the loading bench. Until then enjoy the video