8.6 BLACKOUT, 350 Gr Maker REX (Rapid EXpanding), Subsonic – 20 Round Box
$59.99
The Just Cause USA 8.6 Blackout 350gr Maker REX Subsonic is our flagship load, featured as Garand Thumb’s favorite subsonic 8.6 Blackout cartridge in his comprehensive testing. This heavy subsonic load delivers devastating terminal performance on medium to large game while remaining exceptionally quiet through silencers. This ammunition has been proven on everything from whitetail deer to Cape Buffalo in Africa.
The Maker REX bullet is precision CNC-machined from solid copper with engineered expansion channels. Upon impact, the REX projectile expands to nearly three times its original diameter (.338" to approximately .950") while maintaining nearly 100% weight retention. This combination delivers maximum energy transfer and deep penetration.
Our 350gr Maker REX has been successfully used to harvest:
- Cape Buffalo
- Whitetail deer, elk, wild hogs, and black bear
- Exotic game
Technical Specifications
| Specification | Value |
| Caliber | 8.6 Blackout (.338") |
| Bullet Weight | 350 grains |
| Bullet Type | Maker REX Expanding (Solid Copper) |
| Sectional Density (SD) | .438 |
| Ballistic Coefficient (BC) | .53 G1 |
| Case Type | 8.6 Blackout Starline Brass |
| Primer | Large rifle |
| Recommended Barrel Twist Rate | 1:3 or 1:5 |
| Box Quantity | 20 rounds |
Barrel Length & Velocity Data
| Barrel Length | Muzzle Velocity | Muzzle Energy |
| 8" Barrel | 950 fps | ~700 ft-lbs |
| 12" Barrel | 980 fps | ~745 ft-lbs |
| 16" Barrel | 1040 fps | ~840 ft-lbs |
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