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8.6 mm Blackout

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Caliber 8.6 mm Blackout load data and technical Specifications

Caliber Specifications:

Caliber:
8.6 mm Blackout
Bullet Diameter:
0.338" | 8.59mm
Primer Size:
Large Rifle (LR)
Max. Case Length:
1.685" | 42.80mm
Max. Cartridge Length / OAL:
2.825" | 71.75mm
Max. Standardized Pressure:
63092 psi | 4350 bar
Case Capacity:
50.0 Grains of Water
CID:
CID_1210
  • 8.6mm Blackout (8.6×43 mm), sometimes referred to as 8.6 BLK, is a centerfire rifle cartridge developed by the firearms manufacturer Q, LLC.[6] It utilizes a shortened case from the 6.5mm Creedmoor necked up to an 8.6 mm caliber (8.585 mm or 0.338 in diameter) projectile. 8.6 Blackout is designed for use in bolt-action rifles or as a caliber conversion for AR-10 style rifles. The only required modification to convert an existing .308 Winchester-chambered rifle to 8.6mm Blackout is the replacement of the barrel. The 8.6 Blackout shares the same case head and bolt diameter as its parent cartridge, 6.5mm Creedmoor. All other components of a standard AR-10 rifle are compatible. Modifications to the operating system such as the buffer, buffer spring and gas system may be made in order to optimize functionality of the firearm. 8.6 Blackout fits in standard, unmodified .308 Winchester or 6.5 Creedmoor magazines with no effect on capacity. The 8.6 Blackout is designed for barrels using a 76 mm or 102 mm (1:3 in or 1:4 in) twist rate and bullet weights between 10.4–14.6 g (160–225 gr) for supersonic loads and 18.5–22.7 g (285–350 gr) for subsonic loads. The "fast" twist rate 8.6mm Blackout is designed for was intended to create better expansion and more terminal energy transferred to the target through the "blender effect" of a rapidly-spinning subsonic bullet.
  • Bullet Weight (gr) ->
    0-50
    50-75
    75-100
    100-150
    150-200
    200-300
    >300

    The following table indicates  for this caliber and various bullet weight ranges (in grains) which powders are suitable (👍) and popular among our reloading community (👍👍).  This might evolve over time as more community members share their loads and as we accumulate more calculations and tests with our balistics calculator.

  • Weight vs. Velocity - Suitable Bullets for this Caliber

    You need to get an access license to view this chart. See an example with the following caliber: .22 Nosler

    Barrel Length  Variation vs. Velocity - by Bullet Weight

  • Number of loads in this caliber shared by community members:

    5

8.6 mm Blackout load data available with the following bullets:

(most popular first)

Filter by Bullet Weight (Grains)
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