Load Specifications
Load data in caliber 8.6 mm Blackout with .338 | 220gr | Peregrine Bushmaster (VRG-3) bullet and 38 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% | 52,663 psi | 85% | 2037 fps | 99.8% |
| Accurate 2015ᴾ | <<locked>> | 100% | 44,353 psi | 72% | 2008 fps | 98.5% |
| Accurate 2460ᴾ | <<locked>> | 100% | 49,385 psi | 80% | 2087 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 96% | 53,069 psi | 86% | 2041 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 96% | 53,693 psi | 87% | 2047 fps | 97.1% |
| ADI AR 2205 | <<locked>> | 84% | 55,288 psi | 89% | 1969 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 55,245 psi | 89% | 2110 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 53,780 psi | 87% | 2152 fps | 98.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 41,162 psi | 66% | 2028 fps | 99.7% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2110 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 94% | 53,998 psi | 87% | 2083 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 54,520 psi | 88% | 2077 fps | 99% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 51,329 psi | 83% | 2123 fps | 98.2% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 52,837 psi | 85% | 2146 fps | 97.5% |
| Hodgdon H4198 | <<locked>> | 94% | 55,274 psi | 89% | 2077 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,183 psi | 50% | 1217 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 39,233 psi | 63% | 2001 fps | 96.5% |
| IMR 4198ᴾ | <<locked>> | 100% | 53,838 psi | 87% | 2093 fps | 100% |
| IMR 4227 | <<locked>> | 90% | 55,854 psi | 90% | 2054 fps | 100% |
| Lovex D060 | <<locked>> | 84% | 55,535 psi | 90% | 2077 fps | 100% |
| Lovex D073.4 | <<locked>> | 96% | 55,172 psi | 89% | 2156 fps | 97.1% |
| Lovex S053 | <<locked>> | 90% | 53,737 psi | 87% | 2014 fps | 100% |
| Norma 200 | <<locked>> | 98% | 55,027 psi | 89% | 2133 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,777 psi | 50% | 1243 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 55,158 psi | 89% | 2083 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 51,343 psi | 83% | 2103 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 96% | 55,172 psi | 89% | 2156 fps | 97.1% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 55,535 psi | 90% | 2077 fps | 100% |
| Shooters World SOCOM | <<locked>> | 82% | 53,403 psi | 86% | 2028 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 54,752 psi | 88% | 1906 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 53,838 psi | 87% | 2152 fps | 97.7% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2123 fps | 99.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 41,959 psi | 68% | 1949 fps | 96.2% |
| Vihtavuori N110 | <<locked>> | 86% | 56,101 psi | 90% | 1969 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 55,390 psi | 89% | 2077 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 49,879 psi | 80% | 2041 fps | 99.7% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 43,236 psi | 70% | 1965 fps | 98.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 35,259 psi | 57% | 1913 fps | 96.5% |
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 38,043 psi | 61% | 1847 fps | 98.1% |
| Accurate 2015 | <<locked>> | 90% | 32,503 psi | 52% | 1821 fps | 95.5% |
| Accurate 2460 | <<locked>> | 96% | 42,859 psi | 69% | 2001 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 84% | 37,101 psi | 60% | 1821 fps | 95.3% |
| Accurate LT-32 | <<locked>> | 90% | 44,947 psi | 72% | 1932 fps | 95.2% |
| ADI AR 2205 | <<locked>> | 80% | 49,197 psi | 79% | 1906 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 33,475 psi | 54% | 1824 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 88% | 38,609 psi | 62% | 1942 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 86% | 26,701 psi | 43% | 1749 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 82% | 29,472 psi | 48% | 1768 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 34,896 psi | 56% | 1821 fps | 98% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 37,188 psi | 60% | 1847 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 92% | 39,682 psi | 64% | 1959 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 94% | 42,931 psi | 69% | 2014 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 82% | 38,508 psi | 62% | 1850 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,032 psi | 37% | 1086 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 36,767 psi | 59% | 1959 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 30,501 psi | 49% | 1745 fps | 97% |
| IMR 4227 | <<locked>> | 80% | 41,408 psi | 67% | 1880 fps | 99.9% |
| Lovex D060 | <<locked>> | 80% | 49,414 psi | 80% | 2005 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 92% | 47,718 psi | 77% | 2067 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 40,480 psi | 65% | 1854 fps | 100% |
| Norma 200 | <<locked>> | 80% | 31,024 psi | 50% | 1791 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,524 psi | 36% | 1106 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 40,524 psi | 65% | 1900 fps | 99.8% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 47,674 psi | 77% | 2057 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 92% | 47,718 psi | 77% | 2067 fps | 95.6% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 49,414 psi | 80% | 2005 fps | 99.9% |
| Shooters World SOCOM | <<locked>> | 80% | 50,096 psi | 81% | 1991 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 37,594 psi | 61% | 1716 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 44,193 psi | 71% | 2028 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 34,505 psi | 56% | 1850 fps | 95.2% |
| Somchem S335 | <<locked>> | 98% | 39,421 psi | 64% | 1913 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 47,181 psi | 76% | 1877 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 33,779 psi | 54% | 1804 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 28,747 psi | 46% | 1713 fps | 95% |
| Vihtavuori N133 | <<locked>> | 92% | 33,779 psi | 54% | 1818 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 98% | 33,040 psi | 53% | 1870 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 38 powders for 8.6 mm Blackout loaded with the .338 | 220gr | Peregrine Bushmaster (VRG-3). Lovex D073.4 delivers the highest muzzle velocity at 2,156 fps; across all powders the maximum-charge window runs from 1,217 fps to 2,156 fps. Accurate 2015 gives the best case fill at 100 %, and 38 of the 38 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 220.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Alliant AR-Comp 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.