Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Sellier & Bellot FMJ-BT 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% | 58,175 psi | 90% | 2943 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,491 psi | 84% | 2989 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 82% | 57,450 psi | 88% | 3054 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 84% | 58,001 psi | 89% | 3048 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,783 psi | 89% | 3038 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,595 psi | 90% | 3173 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 94% | 57,740 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,436 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,566 psi | 90% | 3041 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,768 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,856 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,507 psi | 87% | 3074 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 57,043 psi | 88% | 3074 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,769 psi | 89% | 3009 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,957 psi | 89% | 3035 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,696 psi | 89% | 3048 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,566 psi | 90% | 3041 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,969 psi | 85% | 2992 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,289 psi | 87% | 2976 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,230 psi | 85% | 2959 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,841 psi | 89% | 3120 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,072 psi | 59% | 1942 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,260 psi | 87% | 2949 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,637 psi | 87% | 3035 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,697 psi | 90% | 2969 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,652 psi | 87% | 3045 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,652 psi | 87% | 2920 fps | 100% |
| Norma 217 | <<locked>> | 96% | 58,262 psi | 90% | 3068 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,726 psi | 90% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 58,320 psi | 90% | 3061 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,710 psi | 87% | 2986 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,218 psi | 60% | 1988 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,668 psi | 90% | 3104 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,566 psi | 89% | 3074 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 82% | 58,291 psi | 90% | 3009 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,043 psi | 86% | 2995 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,928 psi | 89% | 3005 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,465 psi | 90% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,798 psi | 90% | 2966 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,392 psi | 90% | 3005 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 82% | 58,465 psi | 90% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,914 psi | 89% | 3061 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,753 psi | 86% | 2999 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 57,957 psi | 89% | 3077 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 55,637 psi | 86% | 3081 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,465 psi | 90% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,349 psi | 90% | 2976 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% | 50,995 psi | 78% | 2831 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,934 psi | 72% | 2848 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 53,592 psi | 82% | 2986 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 50,430 psi | 78% | 2920 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,855 psi | 58% | 2657 fps | 97.4% |
| ADI AR 2218 | 80.2 gr | 88% | 43,439 psi | 67% | 2867 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 35,186 psi | 54% | 2628 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,824 psi | 84% | 2956 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,155 psi | 79% | 2920 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,937 psi | 77% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,121 psi | 68% | 2792 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 45,208 psi | 70% | 2858 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,629 psi | 70% | 2854 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,572 psi | 73% | 2822 fps | 97.1% |
| Bofors RP15 | <<locked>> | 80% | 47,630 psi | 73% | 2851 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 41,249 psi | 63% | 2740 fps | 98.3% |
| Bofors RP5 | <<locked>> | 80% | 51,155 psi | 79% | 2920 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,249 psi | 63% | 2736 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 80% | 52,721 psi | 81% | 2917 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,721 psi | 80% | 2897 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,279 psi | 67% | 2858 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,732 psi | 44% | 1739 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,823 psi | 81% | 2894 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 49,385 psi | 76% | 2907 fps | 99.5% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,027 psi | 85% | 2907 fps | 95.7% |
| IMR 8133 Enduron | 68.6 gr | 82% | 35,143 psi | 54% | 2605 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 43,947 psi | 68% | 2703 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,402 psi | 51% | 2572 fps | 97.5% |
| Norma MRP | <<locked>> | 80% | 54,766 psi | 84% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,227 psi | 77% | 2927 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,484 psi | 70% | 2795 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,501 psi | 45% | 1778 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,192 psi | 66% | 2838 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,726 psi | 61% | 2723 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 54,578 psi | 84% | 2949 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,716 psi | 70% | 2802 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,230 psi | 83% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,853 psi | 84% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,399 psi | 74% | 2799 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,659 psi | 73% | 2812 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 54,781 psi | 84% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 54,056 psi | 83% | 2995 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 45,484 psi | 70% | 2812 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 40,582 psi | 62% | 2740 fps | 96.1% |
| Vihtavuori N570 | 75 gr | 84% | 44,817 psi | 69% | 2867 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,488 psi | 78% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,923 psi | 78% | 2854 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 | 140gr | Sellier & Bellot FMJ-BT. ADI AR 2218 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,173 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 140.0 gr projectile in 0.264" calls for a 1:10.0 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 | 140gr | Sellier & Bellot FMJ-BT 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.