Load Specifications
Load data in caliber 8.6 mm Blackout with .338 | 350gr | MAKER SUB-REX bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL Match, SNPE Vectan SP 10 and Hodgdon H335.
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>> | 88% | 56,289 psi | 89% | 1526 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 53,084 psi | 84% | 1555 fps | 100% |
| Accurate 2200 | <<locked>> | 92% | 56,405 psi | 89% | 1608 fps | 97.3% |
| Accurate 2230 | <<locked>> | 92% | 56,057 psi | 89% | 1614 fps | 97.6% |
| Accurate 2460 | <<locked>> | 98% | 55,085 psi | 87% | 1594 fps | 99.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,567 psi | 64% | 1496 fps | 100% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,429 psi | 78% | 1585 fps | 99.4% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,429 psi | 78% | 1585 fps | 99.4% |
| Accurate 4064ᴾ | <<locked>> | 100% | 37,797 psi | 60% | 1480 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 92% | 53,911 psi | 85% | 1509 fps | 100% |
| Accurate LT-32 | <<locked>> | 92% | 54,447 psi | 86% | 1519 fps | 99.7% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 48,602 psi | 77% | 1558 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 92% | 57,000 psi | 90% | 1545 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 55,521 psi | 88% | 1604 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 51,953 psi | 82% | 1572 fps | 98.5% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,414 psi | 78% | 1572 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 98% | 57,000 psi | 90% | 1588 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 55,361 psi | 88% | 1535 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 54,897 psi | 87% | 1535 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 55,347 psi | 88% | 1568 fps | 99.2% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,124 psi | 78% | 1588 fps | 98.6% |
| Hodgdon CFE223ᴾ | <<locked>> | 100% | 55,869 psi | 89% | 1670 fps | 97.4% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 55,521 psi | 88% | 1604 fps | 100% |
| Hodgdon H335 | <<locked>> | 94% | 54,012 psi | 86% | 1601 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 92% | 55,666 psi | 88% | 1532 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 48,863 psi | 77% | 1568 fps | 97.5% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 41,060 psi | 65% | 1512 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,285 psi | 51% | 886 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 44,150 psi | 70% | 1503 fps | 96.3% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,134 psi | 67% | 1526 fps | 99.9% |
| IMR 4198 | <<locked>> | 96% | 55,608 psi | 88% | 1542 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 56,144 psi | 89% | 1496 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 43,424 psi | 69% | 1532 fps | 95.8% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 51,953 psi | 82% | 1572 fps | 98.5% |
| Lovex D073.4 | <<locked>> | 92% | 56,956 psi | 90% | 1611 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 98% | 55,259 psi | 88% | 1601 fps | 99.4% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 45,832 psi | 73% | 1552 fps | 99% |
| Lovex S053 | <<locked>> | 86% | 54,621 psi | 87% | 1463 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 50,995 psi | 81% | 1529 fps | 97.1% |
| Lovex S062ᴾ | <<locked>> | 100% | 41,887 psi | 66% | 1490 fps | 96.8% |
| Norma 200 | <<locked>> | 92% | 54,172 psi | 86% | 1552 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 47,645 psi | 76% | 1535 fps | 97.9% |
| Norma 202ᴾ | <<locked>> | 100% | 47,369 psi | 75% | 1545 fps | 99.6% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 51,285 psi | 81% | 1591 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 98% | 54,810 psi | 87% | 1581 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,314 psi | 51% | 909 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 56,333 psi | 89% | 1526 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 55,985 psi | 89% | 1601 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 37,898 psi | 60% | 1493 fps | 96.1% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 51,459 psi | 82% | 1558 fps | 99.7% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 44,817 psi | 71% | 1503 fps | 97.4% |
| Shooters World AR Plus | <<locked>> | 92% | 56,956 psi | 90% | 1611 fps | 99.8% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 45,832 psi | 73% | 1552 fps | 99% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 41,887 psi | 66% | 1490 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 53,911 psi | 85% | 1558 fps | 98.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 55,100 psi | 87% | 1375 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 55,738 psi | 88% | 1611 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 55,550 psi | 88% | 1575 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 47,152 psi | 75% | 1545 fps | 96.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,459 psi | 82% | 1519 fps | 99.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,089 psi | 65% | 1437 fps | 99.3% |
| Somchem S321ᴾ | <<locked>> | 100% | 57,058 psi | 90% | 1631 fps | 99.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 1519 fps | 99.9% |
| Somchem S341ᴾ | <<locked>> | 100% | 49,690 psi | 79% | 1558 fps | 96.6% |
| Vihtavuori N110 | <<locked>> | 82% | 56,449 psi | 89% | 1421 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 57,058 psi | 90% | 1516 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 54,636 psi | 87% | 1535 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,618 psi | 80% | 1516 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,366 psi | 67% | 1496 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 44,599 psi | 71% | 1503 fps | 99.4% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 52,692 psi | 84% | 1572 fps | 98.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,931 psi | 68% | 1499 fps | 98.9% |
| Winchester 748ᴾ | <<locked>> | 100% | 55,579 psi | 88% | 1640 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 98% | 56,623 psi | 90% | 1640 fps | 98.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 43,540 psi | 69% | 1417 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 28,195 psi | 45% | 1289 fps | 98.1% |
| Accurate 2200 | <<locked>> | 86% | 46,021 psi | 73% | 1509 fps | 95.3% |
| Accurate 2230 | <<locked>> | 86% | 45,469 psi | 72% | 1516 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 29,820 psi | 47% | 1329 fps | 95.6% |
| Accurate 2495 | <<locked>> | 80% | 20,537 psi | 33% | 1211 fps | 95.3% |
| Accurate 2520 | <<locked>> | 86% | 30,139 psi | 48% | 1368 fps | 95.2% |
| Accurate 2520 | <<locked>> | 86% | 30,139 psi | 48% | 1368 fps | 95.2% |
| Accurate 4064 | <<locked>> | 90% | 27,122 psi | 43% | 1335 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 37,536 psi | 59% | 1352 fps | 99% |
| Accurate LT-32 | <<locked>> | 80% | 37,927 psi | 60% | 1358 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 96% | 43,323 psi | 69% | 1506 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 39,639 psi | 63% | 1401 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,708 psi | 55% | 1398 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 35,868 psi | 57% | 1401 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 26,136 psi | 41% | 1302 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,112 psi | 52% | 1358 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,828 psi | 65% | 1407 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,404 psi | 56% | 1348 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 34,432 psi | 55% | 1352 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 90% | 34,867 psi | 55% | 1430 fps | 95.5% |
| Hodgdon CFE223 | <<locked>> | 94% | 45,368 psi | 72% | 1568 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 29,312 psi | 46% | 1319 fps | 96.8% |
| Hodgdon H335 | 23.4 gr | 80% | 33,446 psi | 53% | 1388 fps | 97.1% |
| Hodgdon H4198 | <<locked>> | 80% | 39,088 psi | 62% | 1375 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 94% | 40,495 psi | 64% | 1480 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 38,827 psi | 62% | 1486 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,772 psi | 38% | 787 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 41,205 psi | 65% | 1470 fps | 95.5% |
| IMR 3031 | <<locked>> | 82% | 24,468 psi | 39% | 1273 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 35,244 psi | 56% | 1352 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 46,760 psi | 74% | 1421 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 40,944 psi | 65% | 1506 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 88% | 35,868 psi | 57% | 1401 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 37,072 psi | 59% | 1421 fps | 97.2% |
| Lovex D073.5 | <<locked>> | 84% | 34,171 psi | 54% | 1388 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 88% | 30,139 psi | 48% | 1368 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 46,267 psi | 73% | 1398 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 42,569 psi | 67% | 1444 fps | 95.3% |
| Lovex S062 | <<locked>> | 96% | 37,202 psi | 59% | 1434 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 37,014 psi | 59% | 1394 fps | 100% |
| Norma 201 | <<locked>> | 92% | 37,202 psi | 59% | 1421 fps | 95.6% |
| Norma 202 | <<locked>> | 84% | 28,689 psi | 45% | 1322 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 94% | 42,192 psi | 67% | 1499 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 90% | 42,351 psi | 67% | 1460 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,917 psi | 38% | 810 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 46,746 psi | 74% | 1447 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 31,473 psi | 50% | 1342 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 35,404 psi | 56% | 1457 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 28,413 psi | 45% | 1289 fps | 95% |
| Rottweil R 902 | <<locked>> | 94% | 37,072 psi | 59% | 1414 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 37,072 psi | 59% | 1421 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 30,139 psi | 48% | 1368 fps | 95.2% |
| Shooters World Precision | <<locked>> | 96% | 37,202 psi | 59% | 1434 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 38,130 psi | 60% | 1404 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 42,496 psi | 67% | 1280 fps | 100% |
| SNPE Vectan SP 10 | 22.9 gr | 80% | 34,708 psi | 55% | 1398 fps | 97.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,649 psi | 53% | 1358 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 41,626 psi | 66% | 1486 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 29,457 psi | 47% | 1276 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 26,774 psi | 42% | 1250 fps | 95.6% |
| Somchem S321 | <<locked>> | 86% | 35,346 psi | 56% | 1414 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 26,803 psi | 42% | 1253 fps | 95.6% |
| Somchem S341 | <<locked>> | 96% | 43,236 psi | 69% | 1496 fps | 95.2% |
| Vihtavuori N110 | <<locked>> | 80% | 53,679 psi | 85% | 1401 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 39,813 psi | 63% | 1378 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,676 psi | 50% | 1309 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 80% | 27,485 psi | 44% | 1260 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 80% | 22,640 psi | 36% | 1227 fps | 96% |
| Vihtavuori N140 | <<locked>> | 84% | 27,238 psi | 43% | 1286 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 88% | 35,810 psi | 57% | 1398 fps | 95% |
| Vihtavuori N540 | <<locked>> | 88% | 29,356 psi | 47% | 1332 fps | 95.3% |
| Winchester 748 | <<locked>> | 86% | 34,476 psi | 55% | 1421 fps | 95.5% |
| Winchester StaBALL Match | 27 gr | 88% | 39,885 psi | 63% | 1480 fps | 95.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 92 powders for 8.6 mm Blackout loaded with the .338 | 350gr | MAKER SUB-REX. Hodgdon CFE223 delivers the highest muzzle velocity at 1,670 fps; across all powders the maximum-charge window runs from 886 fps to 1,670 fps. Accurate 2015 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 350.0 gr projectile in 0.338" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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. Winchester StaBALL Match, SNPE Vectan SP 10, Hodgdon H335 rank at the top here: for 8.6 mm Blackout with the .338 | 350gr | MAKER SUB-REX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder-15 burn incompletely and react more sensitively to barrel length and temperature. 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.