8.6 Blackout ballistics chart , Updated July 2026. Figures compiled from published factory load data and industry sources, rounded to typical values. Velocities always vary by rifle, barrel, temperature and lot. Treat every number here as a reference point, then verify with your own chronograph.

8.6 Blackout ballistics are the most misunderstood numbers in the suppressed shooting world, mostly because people try to read them the way they read a long range cartridge. That is the wrong lens. The 8.6x43mm cartridge was engineered to move the heaviest practical .338 caliber bullet through a short, suppressed barrel, burn all of its powder in as little as 8 inches, and use an extreme twist rate to make the bullet perform at speeds where other cartridges go to sleep. This page collects the full 8.6 Blackout ballistics picture in one place: velocity, energy, barrel length effects, trajectory and twist, for both subsonic and supersonic loads.

8.6 Blackout ballistics chart: subsonic loads

Subsonic is where 8.6 Blackout lives. These loads stay under the speed of sound (roughly 1,125 fps at sea level), which lets a suppressor remove the crack and leaves only the action noise. What separates 8.6 from every other subsonic cartridge is mass: where a 300 Blackout subsonic tops out around 220 grains, 8.6 Blackout pushes 285 to 342 grains of .338 bullet at the same speeds.

Energy computed from listed weight and velocity. Individual factory loads vary; check the box data for the exact load you shoot.

For context, a 45 ACP defensive load carries around 400 ft lbs and a 220gr subsonic 300 Blackout carries roughly 490 ft lbs. A 342gr subsonic 8.6 Blackout carries nearly double the 300 Blackout figure, and it does it with a much larger frontal area and bullets designed to open at slow speed.

8.6 Blackout ballistics chart: supersonic loads

Supersonic 8.6 Blackout gives up the whisper quiet signature and buys velocity, flatter trajectory and dramatically more energy. These loads turn the same rifle into a legitimate short range hunting rig for hogs, deer and black bear class game.

Note how the energy stays near 2,000 ft lbs across the weight range. The cartridge trades speed for mass but keeps its total payload nearly constant.

Velocity by barrel length

This is the number one question shooters ask, and it is where 8.6 Blackout ballistics genuinely surprise people. The cartridge was designed around fast burning powders that finish their work in about 8 inches of barrel. Past that point, extra barrel adds modest velocity for supersonic loads and almost nothing for subsonic loads.

Ranges reflect the spread across published factory data and independent chronograph reports. Subsonic loads are intentionally loaded to stay under roughly 1,080 fps in any barrel so they never break the sound barrier.

The practical takeaway: an 8 or 12 inch 8.6 Blackout gives up very little to a 16 inch gun. That is the entire point of the design. A 12 inch barrel with a suppressor ends up the same overall length as a bare 16 inch rifle and loses almost nothing.

How far does 8.6 Blackout drop?

Subsonic trajectory is the price you pay for quiet. Subsonic 8.6 Blackout ballistics turn into a rainbow past 150 yards, and you need to know your holds. Supersonic loads behave like a stout lever gun cartridge and stay practical to 300 yards.

Estimates from standard ballistic modeling of typical published loads at sea level. Run your exact load and conditions through a ballistic calculator before hunting.

The 1:3 twist: why the barrel matters more than the case

The signature engineering choice in 8.6 Blackout is the 1:3 twist rate. One full bullet rotation every three inches is roughly three times faster than a conventional .338 barrel, and it does two things.

First, it stabilizes very long, very heavy bullets at subsonic speed, which slower twists cannot reliably do. Second, it stores serious rotational energy in the bullet. A 342gr bullet leaving a 1:3 barrel at 1,050 fps spins at roughly 250,000 rpm. That spin drives expansion and fracturing bullet designs to open aggressively even at velocities where conventional bullets pencil through without upsetting. It is why real world 8.6 Blackout ballistics read better than the paper energy suggests, and it is the reason the cartridge cannot be judged by muzzle energy alone.

8.6 Blackout vs 300 Blackout vs 338 Federal

The short version: 300 Blackout is the quiet compact carbine round, 338 Federal is the full power rifle round, and 8.6 Blackout sits deliberately between them, taking the suppressed short barrel concept from the 300 and the bullet class from the 338. If you want the deeper comparison, read our full 8.6 Blackout vs 300 Blackout breakdown.

What these numbers mean in the field

Numbers on a chart only matter when they map to a use case. Here is how 8.6 Blackout ballistics translate to the field.

Suppressed hunting inside 150 yards: this is the cartridge at its best. A 300gr class expanding subsonic carries enough momentum and frontal area for hogs and deer at woods distances, with a report closer to a staple gun than a rifle. Hold for the drop and it delivers.

Mixed use rifles: zero with supersonic hunting loads, keep a magazine of subsonics for the same rifle. The two impact differently, so record both zeroes. The ability to swap between a 2,000 ft lb hunting load and a movie quiet subsonic without touching the rifle is the practical magic of the platform.

Long range: wrong tool. Past 300 yards the subsonics have dropped multiple feet and the supers are slowing fast. If your shooting lives at distance, a 6.5 Creedmoor or 338 Federal serves you better. Buying 8.6 Blackout for long range is how the cartridge earns unfair bad reviews.

When you are ready to shoot it rather than read about it, our 8.6 Blackout ammo shelf carries subsonic and supersonic factory loads, and the 300 Blackout ammo range covers the little brother.

Frequently asked questions

How fast is 8.6 Blackout?

Subsonic factory loads run roughly 1,000 to 1,080 fps with 285gr to 342gr bullets. Supersonic loads run roughly 1,900 to 2,400 fps depending on bullet weight and barrel length. The 8.6 Blackout ballistics tables above break both down in detail.

How much energy does 8.6 Blackout have?

Typical subsonic loads carry roughly 700 to 840 ft lbs at the muzzle. Supersonic loads carry roughly 2,000 ft lbs, which is broadly comparable to a 30-30 Winchester with a much heavier bullet.

What barrel length is best for 8.6 Blackout?

The cartridge achieves nearly full performance in 8 to 12 inches of barrel. A 12 inch barrel is the sweet spot for most shooters: nearly all the velocity of a 16 inch gun in a package built for a suppressor.

Is 8.6 Blackout good for deer and hogs?

Yes, inside its envelope. Supersonic loads are a clear yes to 250 or 300 yards. Subsonic loads work at woods ranges with expanding or fracturing bullets designed for slow speed, kept inside roughly 150 yards by trajectory.

Why does 8.6 Blackout use a 1:3 twist?

To stabilize very heavy bullets at subsonic speed and to spin bullets fast enough that they expand reliably at low velocity. The rotational energy is a core part of the terminal design, not a gimmick.

Is 8.6 Blackout the same as 338 ARC?

No. They chase a similar goal, heavy .338 bullets from short suppressed barrels, but they are different cartridges with different cases, chambers and pressures, and they are not interchangeable in any way.