Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 142gr | Nosler AccuBond Long Range bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon Retumbo and Vihtavuori N570.
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% | 58,102 psi | 89% | 2923 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,302 psi | 84% | 2969 fps | 98% |
| Accurate MAGPRO | <<locked>> | 82% | 57,421 psi | 88% | 3038 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,726 psi | 90% | 3005 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,943 psi | 89% | 3031 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,580 psi | 89% | 3018 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,363 psi | 90% | 3156 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 94% | 57,609 psi | 89% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,363 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,494 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,681 psi | 87% | 2920 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,870 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,507 psi | 87% | 3058 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,826 psi | 87% | 3054 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,638 psi | 89% | 2989 fps | 99.1% |
| Bofors RP15 | <<locked>> | 86% | 57,899 psi | 89% | 3012 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,711 psi | 89% | 3031 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,494 psi | 90% | 3022 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,998 psi | 85% | 2976 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,246 psi | 87% | 2956 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,143 psi | 85% | 2940 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,827 psi | 89% | 3104 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 59% | 1926 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,173 psi | 86% | 2933 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 56,565 psi | 87% | 3015 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,508 psi | 90% | 2949 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,507 psi | 87% | 3028 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,550 psi | 87% | 2900 fps | 100% |
| Norma 217 | <<locked>> | 96% | 58,131 psi | 89% | 3048 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,697 psi | 90% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 58,291 psi | 90% | 3041 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,507 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,276 psi | 60% | 1972 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,537 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,493 psi | 88% | 3054 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 58,784 psi | 90% | 2976 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 58,392 psi | 90% | 2992 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,043 psi | 86% | 2979 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 58,030 psi | 89% | 2986 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,378 psi | 90% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,769 psi | 90% | 2949 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,276 psi | 90% | 2986 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 82% | 58,320 psi | 90% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,870 psi | 89% | 3041 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,767 psi | 86% | 2982 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 57,841 psi | 89% | 3061 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 55,535 psi | 85% | 3061 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,421 psi | 90% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,334 psi | 90% | 2956 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% | 50,865 psi | 78% | 2812 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 43,526 psi | 67% | 2769 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 53,548 psi | 82% | 2969 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 80% | 54,940 psi | 85% | 2946 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,299 psi | 77% | 2900 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 80% | 37,884 psi | 58% | 2644 fps | 97.5% |
| ADI AR 2218 | 79.3 gr | 88% | 43,323 psi | 67% | 2848 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 35,230 psi | 54% | 2615 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,665 psi | 84% | 2936 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,024 psi | 79% | 2900 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,777 psi | 77% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,961 psi | 68% | 2776 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 45,063 psi | 69% | 2841 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,542 psi | 70% | 2838 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,529 psi | 73% | 2808 fps | 97.3% |
| Bofors RP15 | <<locked>> | 80% | 47,688 psi | 73% | 2838 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 41,118 psi | 63% | 2720 fps | 98.3% |
| Bofors RP5 | <<locked>> | 80% | 51,024 psi | 79% | 2900 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,321 psi | 64% | 2723 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 80% | 52,605 psi | 81% | 2894 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,576 psi | 79% | 2877 fps | 99.4% |
| Hodgdon Retumbo | 68.1 gr | 80% | 43,337 psi | 67% | 2844 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 44% | 1722 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,692 psi | 81% | 2874 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 49,240 psi | 76% | 2887 fps | 99.5% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,027 psi | 85% | 2890 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,735 psi | 50% | 2530 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 43,918 psi | 68% | 2687 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,402 psi | 51% | 2556 fps | 97.6% |
| Norma MRP | <<locked>> | 80% | 54,665 psi | 84% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,343 psi | 77% | 2910 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 45,426 psi | 70% | 2779 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,588 psi | 46% | 1765 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,163 psi | 66% | 2822 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,508 psi | 61% | 2707 fps | 96.4% |
| Rottweil R 904 | <<locked>> | 80% | 55,071 psi | 85% | 2917 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,650 psi | 84% | 2933 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,643 psi | 70% | 2789 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,302 psi | 84% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,737 psi | 84% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,269 psi | 74% | 2779 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 47,645 psi | 73% | 2795 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 54,839 psi | 84% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,969 psi | 83% | 2976 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 45,411 psi | 70% | 2795 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 80% | 40,509 psi | 62% | 2723 fps | 96.2% |
| Vihtavuori N570 | 74.2 gr | 84% | 44,802 psi | 69% | 2851 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,372 psi | 78% | 2900 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,807 psi | 78% | 2838 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 49 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 142gr | Nosler AccuBond Long Range. ADI AR 2218 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,156 fps. Accurate 8700 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 (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 142.0 gr projectile in 0.264" calls for a 1:8.5 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, Hodgdon Retumbo, Vihtavuori N570 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 142gr | Nosler AccuBond Long Range 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.