Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 139gr | Norma VULKAN bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and IMR 8133 Enduron.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 58,073 psi | 89% | 2949 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,447 psi | 84% | 2992 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 82% | 57,319 psi | 88% | 3058 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,769 psi | 90% | 3035 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,914 psi | 89% | 3058 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,638 psi | 89% | 3045 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,581 psi | 90% | 3179 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 94% | 57,769 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,392 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,465 psi | 90% | 3048 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,724 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,769 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,521 psi | 87% | 3081 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 57,000 psi | 88% | 3077 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,856 psi | 89% | 3015 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,870 psi | 89% | 3038 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,812 psi | 89% | 3058 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,465 psi | 90% | 3048 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 55,100 psi | 85% | 3002 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,231 psi | 87% | 2982 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,361 psi | 85% | 2969 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,943 psi | 89% | 3130 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,189 psi | 59% | 1949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,217 psi | 87% | 2959 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,536 psi | 87% | 3038 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,581 psi | 90% | 2972 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,478 psi | 87% | 3048 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,550 psi | 87% | 2923 fps | 100% |
| Norma 217 | <<locked>> | 96% | 58,291 psi | 90% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 58,204 psi | 90% | 3064 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,579 psi | 87% | 2989 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,160 psi | 60% | 1995 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,697 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,609 psi | 89% | 3084 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 82% | 58,450 psi | 90% | 3018 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,028 psi | 86% | 3002 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 58,088 psi | 89% | 3015 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,610 psi | 90% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,682 psi | 90% | 2972 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,233 psi | 90% | 3012 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 82% | 58,421 psi | 90% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 58,059 psi | 89% | 3071 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,666 psi | 86% | 3005 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 58,015 psi | 89% | 3087 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 55,477 psi | 85% | 3084 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,537 psi | 90% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,508 psi | 90% | 2986 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 50,937 psi | 78% | 2838 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,949 psi | 72% | 2858 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 53,505 psi | 82% | 2995 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 55,042 psi | 85% | 2972 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,357 psi | 78% | 2923 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,811 psi | 58% | 2664 fps | 97.3% |
| ADI AR 2218 | 80.6 gr | 88% | 43,482 psi | 67% | 2874 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 35,128 psi | 54% | 2631 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,781 psi | 84% | 2963 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,111 psi | 79% | 2927 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,922 psi | 77% | 2844 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,048 psi | 68% | 2799 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 45,223 psi | 70% | 2864 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,614 psi | 70% | 2861 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,500 psi | 73% | 2831 fps | 97.1% |
| Bofors RP15 | <<locked>> | 80% | 47,601 psi | 73% | 2858 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 41,191 psi | 63% | 2743 fps | 98.2% |
| Bofors RP5 | <<locked>> | 80% | 51,111 psi | 79% | 2927 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 41,220 psi | 63% | 2743 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 52,663 psi | 81% | 2923 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,648 psi | 79% | 2904 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,236 psi | 67% | 2864 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,718 psi | 44% | 1745 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,765 psi | 81% | 2900 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 49,327 psi | 76% | 2913 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,940 psi | 85% | 2913 fps | 95.6% |
| IMR 8133 Enduron | 69 gr | 82% | 35,215 psi | 54% | 2612 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 43,918 psi | 68% | 2710 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,359 psi | 51% | 2575 fps | 97.4% |
| Ramshot Grand | <<locked>> | 80% | 50,343 psi | 77% | 2936 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,411 psi | 70% | 2799 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 45% | 1785 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,120 psi | 66% | 2841 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,624 psi | 61% | 2726 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 54,752 psi | 84% | 2959 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,716 psi | 70% | 2808 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,404 psi | 84% | 2956 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,810 psi | 84% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,341 psi | 74% | 2805 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,732 psi | 73% | 2818 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 54,766 psi | 84% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 54,186 psi | 83% | 3005 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,440 psi | 70% | 2815 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 40,509 psi | 62% | 2743 fps | 95.9% |
| Vihtavuori N570 | 75.4 gr | 84% | 44,889 psi | 69% | 2874 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,415 psi | 78% | 2923 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,850 psi | 78% | 2861 fps | 99.9% |
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 47 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 139gr | Norma VULKAN. ADI AR 2218 delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,949 fps to 3,179 fps. Accurate 8700 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, IMR 8133 Enduron rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 139gr | Norma VULKAN they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.