Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 156gr | Norma VULKAN bullet and 40 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>> | 82% | 58,015 psi | 89% | 2799 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 55,056 psi | 85% | 2871 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 82% | 57,711 psi | 89% | 2904 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 58,001 psi | 89% | 2900 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 54,824 psi | 84% | 2976 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 92% | 58,262 psi | 90% | 2923 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 58,320 psi | 90% | 2897 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 56,942 psi | 88% | 2799 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 58,262 psi | 90% | 2881 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 57,014 psi | 88% | 2949 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 57,609 psi | 89% | 2953 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 57,377 psi | 88% | 2867 fps | 99.5% |
| Bofors RP15 | <<locked>> | 84% | 58,001 psi | 89% | 2890 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 57,986 psi | 89% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 58,320 psi | 90% | 2897 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 55,376 psi | 85% | 2861 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 58,697 psi | 90% | 2874 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 58,450 psi | 90% | 2979 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,392 psi | 59% | 1847 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 56,710 psi | 87% | 2894 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 58,102 psi | 89% | 2831 fps | 97.5% |
| IMR 8133 Enduron | <<locked>> | 94% | 57,232 psi | 88% | 2917 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 56,115 psi | 86% | 2831 fps | 96.1% |
| Lovex S071 | <<locked>> | 86% | 56,710 psi | 87% | 2779 fps | 100% |
| Norma 217 | <<locked>> | 92% | 55,172 psi | 85% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 58,436 psi | 90% | 2920 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 58,262 psi | 90% | 2969 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 84% | 56,710 psi | 87% | 2844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,407 psi | 61% | 1886 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 55,056 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 57,943 psi | 89% | 2943 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 56,115 psi | 86% | 2831 fps | 96.1% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 56,579 psi | 87% | 2877 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 53,911 psi | 83% | 2851 fps | 97% |
| Vihtavuori N165 | <<locked>> | 84% | 58,624 psi | 90% | 2825 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 58,204 psi | 90% | 2874 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 84% | 55,883 psi | 86% | 2867 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 58,320 psi | 90% | 2949 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 56,130 psi | 86% | 2953 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 82% | 58,131 psi | 89% | 2831 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% | 54,331 psi | 84% | 2746 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 41,089 psi | 63% | 2612 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 80% | 53,911 psi | 83% | 2844 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 40,857 psi | 63% | 2605 fps | 99.1% |
| ADI AR 2218 | 75.6 gr | 84% | 40,727 psi | 63% | 2687 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 38,435 psi | 59% | 2582 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 54,621 psi | 84% | 2841 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 53,301 psi | 82% | 2746 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 47,543 psi | 73% | 2720 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 39,392 psi | 61% | 2608 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 86% | 43,105 psi | 66% | 2680 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 50,488 psi | 78% | 2753 fps | 98.7% |
| Bofors RP15 | <<locked>> | 80% | 50,836 psi | 78% | 2776 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 44,483 psi | 68% | 2680 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 54,621 psi | 84% | 2841 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 44,599 psi | 69% | 2677 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 54,940 psi | 85% | 2818 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 47,413 psi | 73% | 2799 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,892 psi | 44% | 1650 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 52,939 psi | 81% | 2831 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,979 psi | 74% | 2657 fps | 95.1% |
| IMR 8133 Enduron | 66.1 gr | 80% | 35,766 psi | 55% | 2500 fps | 97.5% |
| Lovex D100 | <<locked>> | 88% | 52,330 psi | 81% | 2769 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 46,978 psi | 72% | 2628 fps | 100% |
| Norma 217 | <<locked>> | 80% | 36,695 psi | 56% | 2533 fps | 99.4% |
| Ramshot Grand | <<locked>> | 80% | 54,230 psi | 83% | 2854 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 54,288 psi | 84% | 2900 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 80% | 48,950 psi | 75% | 2723 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,704 psi | 46% | 1690 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 47,166 psi | 73% | 2776 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 43,178 psi | 66% | 2680 fps | 98.4% |
| Shooters World 50 BMG | <<locked>> | 88% | 52,330 psi | 81% | 2769 fps | 95.1% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 43,149 psi | 66% | 2635 fps | 95.7% |
| Vihtavuori 20N29 | <<locked>> | 96% | 46,673 psi | 72% | 2720 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 51,445 psi | 79% | 2720 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 44,483 psi | 68% | 2628 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 80% | 48,849 psi | 75% | 2746 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 44,005 psi | 68% | 2690 fps | 98.2% |
| Vihtavuori N570 | 70.5 gr | 80% | 42,134 psi | 65% | 2680 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 54,172 psi | 83% | 2776 fps | 100% |
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 40 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 156gr | Norma VULKAN. Hodgdon Retumbo delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,847 fps to 2,979 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 40 of the 40 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 156.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori 20N29 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 | 156gr | 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.