Load Specifications
Load data in caliber 8.6 mm Blackout with .338 | 285gr | Barnes TSX BT bullet and 60 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 90% | 56,260 psi | 89% | 1752 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 48,240 psi | 76% | 1739 fps | 99.9% |
| Accurate 2460ᴾ | <<locked>> | 100% | 53,708 psi | 85% | 1814 fps | 99% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,027 psi | 57% | 1657 fps | 98.9% |
| Accurate 2520ᴾ | <<locked>> | 100% | 47,021 psi | 75% | 1775 fps | 97.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 33,663 psi | 53% | 1631 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 96% | 56,768 psi | 90% | 1759 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 94% | 53,896 psi | 85% | 1732 fps | 98.8% |
| ADI APS 450 | <<locked>> | 82% | 56,956 psi | 90% | 1286 fps | 100% |
| ADI AR 2205 | <<locked>> | 82% | 55,332 psi | 88% | 1650 fps | 100% |
| ADI AR 2207 | <<locked>> | 94% | 55,854 psi | 89% | 1775 fps | 100% |
| ADI AR 2219 | <<locked>> | 96% | 54,375 psi | 86% | 1827 fps | 99.8% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 47,877 psi | 76% | 1749 fps | 96.1% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 45,063 psi | 71% | 1762 fps | 100% |
| Alliant Power Pro 1200-Rᴾ | <<locked>> | 100% | 54,592 psi | 87% | 1880 fps | 97% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 56,202 psi | 89% | 1821 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 92% | 54,810 psi | 87% | 1762 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 54,534 psi | 86% | 1759 fps | 99.9% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 51,706 psi | 82% | 1755 fps | 97.5% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 44,672 psi | 71% | 1762 fps | 96.1% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 55,579 psi | 88% | 1841 fps | 99.8% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 57,058 psi | 90% | 1860 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 92% | 55,477 psi | 88% | 1755 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,923 psi | 51% | 1020 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,438 psi | 67% | 1745 fps | 99.1% |
| IMR 4198 | <<locked>> | 98% | 54,650 psi | 87% | 1768 fps | 100% |
| IMR 4227 | <<locked>> | 88% | 55,883 psi | 89% | 1722 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 47,877 psi | 76% | 1749 fps | 96.1% |
| Lovex D060 | <<locked>> | 82% | 55,840 psi | 89% | 1749 fps | 100% |
| Lovex D073.4 | <<locked>> | 94% | 55,912 psi | 89% | 1834 fps | 98.9% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 54,099 psi | 86% | 1818 fps | 98.1% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 41,379 psi | 66% | 1719 fps | 96.6% |
| Lovex S053 | <<locked>> | 88% | 53,954 psi | 86% | 1686 fps | 100% |
| Norma 200 | <<locked>> | 96% | 55,956 psi | 89% | 1804 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 43,526 psi | 69% | 1722 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,749 psi | 50% | 1043 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 55,332 psi | 88% | 1749 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 54,998 psi | 87% | 1821 fps | 98.6% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 47,123 psi | 75% | 1736 fps | 98.3% |
| Shooters World AR Plus | <<locked>> | 94% | 55,912 psi | 89% | 1834 fps | 98.9% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 55,840 psi | 89% | 1749 fps | 100% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 41,379 psi | 66% | 1719 fps | 96.6% |
| Shooters World SOCOM | <<locked>> | 82% | 56,652 psi | 90% | 1736 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 96% | 53,055 psi | 84% | 1772 fps | 96.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 92% | 54,781 psi | 87% | 1588 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 96% | 54,462 psi | 86% | 1831 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 54,505 psi | 86% | 1801 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 47,355 psi | 75% | 1696 fps | 98.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,782 psi | 60% | 1598 fps | 97.3% |
| Somchem S321ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 1814 fps | 97.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 45,440 psi | 72% | 1696 fps | 98.7% |
| Vihtavuori N110 | <<locked>> | 84% | 56,275 psi | 89% | 1640 fps | 100% |
| Vihtavuori N120 | <<locked>> | 94% | 55,985 psi | 89% | 1742 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 53,447 psi | 85% | 1755 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 46,485 psi | 74% | 1696 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,305 psi | 61% | 1667 fps | 99.2% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 41,031 psi | 65% | 1677 fps | 97.6% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 48,762 psi | 77% | 1755 fps | 96.3% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 39,479 psi | 63% | 1667 fps | 96.6% |
| Winchester 748ᴾ | <<locked>> | 100% | 46,137 psi | 73% | 1772 fps | 96.6% |
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 40,625 psi | 64% | 1594 fps | 99.7% |
| Accurate 2015 | <<locked>> | 80% | 25,802 psi | 41% | 1430 fps | 95.3% |
| Accurate 2460 | <<locked>> | 88% | 35,911 psi | 57% | 1608 fps | 95.6% |
| Accurate 2495 | <<locked>> | 90% | 25,715 psi | 41% | 1493 fps | 95.8% |
| Accurate 2520 | <<locked>> | 94% | 38,043 psi | 60% | 1667 fps | 95.8% |
| Accurate 4064 | <<locked>> | 98% | 31,502 psi | 50% | 1598 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 35,056 psi | 56% | 1512 fps | 97% |
| Accurate LT-32 | <<locked>> | 82% | 37,391 psi | 59% | 1542 fps | 95.5% |
| ADI APS 450 | <<locked>> | 80% | 55,056 psi | 87% | 1270 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 51,982 psi | 82% | 1621 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 36,448 psi | 58% | 1575 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 31,763 psi | 50% | 1545 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 98% | 44,976 psi | 71% | 1716 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 24,018 psi | 38% | 1437 fps | 96.9% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 47,921 psi | 76% | 1808 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,226 psi | 48% | 1509 fps | 98.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,826 psi | 60% | 1578 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,909 psi | 52% | 1506 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 94% | 43,076 psi | 68% | 1660 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 98% | 41,916 psi | 66% | 1726 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 82% | 31,096 psi | 49% | 1535 fps | 95.3% |
| Hodgdon H335 | <<locked>> | 86% | 35,578 psi | 56% | 1614 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 38,798 psi | 61% | 1572 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,511 psi | 37% | 909 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 29,457 psi | 47% | 1549 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 32,634 psi | 52% | 1512 fps | 99.3% |
| IMR 4227 | <<locked>> | 80% | 43,918 psi | 70% | 1608 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 44,976 psi | 71% | 1716 fps | 95.4% |
| Lovex D060 | <<locked>> | 80% | 52,431 psi | 83% | 1716 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 36,289 psi | 58% | 1611 fps | 95% |
| Lovex D073.5 | <<locked>> | 92% | 41,191 psi | 65% | 1680 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 96% | 35,766 psi | 57% | 1647 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 43,163 psi | 68% | 1585 fps | 100% |
| Norma 200 | <<locked>> | 80% | 33,823 psi | 54% | 1558 fps | 99.4% |
| Norma 202 | <<locked>> | 92% | 33,663 psi | 53% | 1588 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,119 psi | 37% | 925 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 43,439 psi | 69% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 37,637 psi | 60% | 1624 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 90% | 35,157 psi | 56% | 1581 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 82% | 36,289 psi | 58% | 1611 fps | 95% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 52,431 psi | 83% | 1716 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 35,766 psi | 57% | 1647 fps | 95% |
| Shooters World SOCOM | <<locked>> | 80% | 53,185 psi | 84% | 1703 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 46,108 psi | 73% | 1696 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,277 psi | 64% | 1460 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 34,084 psi | 54% | 1585 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,183 psi | 49% | 1516 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 34,896 psi | 55% | 1542 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 31,517 psi | 50% | 1506 fps | 95.3% |
| Somchem S321 | <<locked>> | 94% | 42,598 psi | 68% | 1709 fps | 95.2% |
| Somchem S335 | <<locked>> | 88% | 31,604 psi | 50% | 1512 fps | 95.4% |
| Vihtavuori N110 | <<locked>> | 80% | 50,285 psi | 80% | 1591 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 36,651 psi | 58% | 1552 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,356 psi | 47% | 1463 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 82% | 26,934 psi | 43% | 1427 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 88% | 26,440 psi | 42% | 1476 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 94% | 33,953 psi | 54% | 1578 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 98% | 45,687 psi | 72% | 1719 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 96% | 34,867 psi | 55% | 1601 fps | 95.1% |
| Winchester 748 | <<locked>> | 96% | 40,770 psi | 65% | 1706 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 60 powders for 8.6 mm Blackout loaded with the .338 | 285gr | Barnes TSX BT. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 1,880 fps; across all powders the maximum-charge window runs from 1,020 fps to 1,880 fps. Accurate 2015 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 285.0 gr projectile in 0.338" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.