Load Specifications
Load data in caliber 8.6 mm Blackout with .338 | 170gr | Reichenberg HDB Universal bullet and 32 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-7, ADI AR 2207 and Norma 200.
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>> | 92% | 54,128 psi | 86% | 2411 fps | 99.2% |
| Accurate 2015ᴾ | <<locked>> | 100% | 42,032 psi | 67% | 2306 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 98% | 54,215 psi | 86% | 2405 fps | 97.3% |
| Accurate No. 11 FS | <<locked>> | 82% | 56,159 psi | 89% | 2415 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 56,231 psi | 89% | 1834 fps | 100% |
| ADI AR 2205 | <<locked>> | 86% | 56,478 psi | 90% | 2346 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 55,521 psi | 88% | 2493 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 54,708 psi | 87% | 2526 fps | 97.1% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 39,160 psi | 62% | 2326 fps | 97.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 49,095 psi | 78% | 2438 fps | 98.8% |
| Alliant Reloder-7 | <<locked>> | 96% | 54,882 psi | 87% | 2461 fps | 99.6% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 55,564 psi | 88% | 2441 fps | 97.8% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 49,008 psi | 78% | 2444 fps | 95.9% |
| Hodgdon H4198 | <<locked>> | 96% | 56,579 psi | 90% | 2454 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,821 psi | 49% | 1457 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 51,547 psi | 82% | 2431 fps | 99.6% |
| IMR 4227 | <<locked>> | 92% | 56,536 psi | 90% | 2438 fps | 100% |
| Lovex D060 | <<locked>> | 86% | 57,014 psi | 90% | 2470 fps | 99.9% |
| Lovex D063 | <<locked>> | 82% | 57,087 psi | 90% | 2457 fps | 99.9% |
| Lovex S053 | <<locked>> | 92% | 54,273 psi | 86% | 2388 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 55,622 psi | 88% | 2513 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,226 psi | 48% | 1486 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 56,217 psi | 89% | 2467 fps | 100% |
| Shooters World Blackout | <<locked>> | 82% | 57,087 psi | 90% | 2457 fps | 99.9% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 57,014 psi | 90% | 2470 fps | 99.9% |
| Shooters World SOCOM | <<locked>> | 84% | 54,810 psi | 87% | 2408 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 55,100 psi | 87% | 2270 fps | 100% |
| SNPE Vectan SP 10ᴾ | <<locked>> | 100% | 54,897 psi | 87% | 2523 fps | 95.9% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 50,662 psi | 80% | 2448 fps | 97.4% |
| Vihtavuori N110 | <<locked>> | 86% | 54,099 psi | 86% | 2320 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 55,666 psi | 88% | 2457 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 47,485 psi | 75% | 2356 fps | 98.3% |
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% | 36,114 psi | 57% | 2126 fps | 95.7% |
| Accurate 2015 | <<locked>> | 98% | 39,392 psi | 62% | 2260 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 92% | 45,179 psi | 72% | 2274 fps | 95.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 52,852 psi | 84% | 2372 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 54,012 psi | 86% | 1808 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 47,355 psi | 75% | 2231 fps | 100% |
| ADI AR 2207 | 31.2 gr | 80% | 31,662 psi | 50% | 2103 fps | 98.1% |
| ADI AR 2219 | <<locked>> | 96% | 47,877 psi | 76% | 2425 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 94% | 32,503 psi | 52% | 2182 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 90% | 35,781 psi | 57% | 2205 fps | 95.7% |
| Alliant Reloder-7 | 32.3 gr | 80% | 33,257 psi | 53% | 2100 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 42,888 psi | 68% | 2257 fps | 95% |
| Hodgdon H322 | <<locked>> | 98% | 46,050 psi | 73% | 2395 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 90% | 47,108 psi | 75% | 2316 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,568 psi | 36% | 1299 fps | 100% |
| IMR 4198 | <<locked>> | 84% | 32,474 psi | 51% | 2090 fps | 95.5% |
| IMR 4227 | <<locked>> | 80% | 39,523 psi | 63% | 2185 fps | 98.9% |
| Lovex D060 | <<locked>> | 80% | 47,558 psi | 75% | 2333 fps | 99.1% |
| Lovex D063 | <<locked>> | 80% | 53,258 psi | 84% | 2405 fps | 99.7% |
| Lovex S053 | <<locked>> | 80% | 38,305 psi | 61% | 2156 fps | 100% |
| Norma 200 | 34.3 gr | 84% | 33,431 psi | 53% | 2149 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,205 psi | 35% | 1325 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 38,595 psi | 61% | 2201 fps | 98.6% |
| Shooters World Blackout | <<locked>> | 80% | 53,258 psi | 84% | 2405 fps | 99.7% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 47,558 psi | 75% | 2333 fps | 99.1% |
| Shooters World SOCOM | <<locked>> | 80% | 47,747 psi | 76% | 2310 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 35,998 psi | 57% | 2014 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 51,242 psi | 81% | 2474 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 41,989 psi | 67% | 2306 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 45,194 psi | 72% | 2205 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 31,908 psi | 51% | 2083 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 90% | 34,795 psi | 55% | 2136 fps | 95% |
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 49 powders for 8.6 mm Blackout loaded with the .338 | 170gr | Reichenberg HDB Universal. ADI AR 2219 delivers the highest muzzle velocity at 2,526 fps; across all powders the maximum-charge window runs from 1,457 fps to 2,526 fps. Accurate 2015 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.338" calls for a 1:14.0 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. Alliant Reloder-7, ADI AR 2207, Norma 200 rank at the top here: for 8.6 mm Blackout with the .338 | 170gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2460, Accurate 2495, Hodgdon Benchmark burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.