Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 139gr | Fox Classic Hunter bullet and 52 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 Alliant Reloder-33.
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>> | 86% | 57,711 psi | 89% | 2946 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,501 psi | 76% | 2913 fps | 96.5% |
| Accurate High Country | <<locked>> | 82% | 56,275 psi | 87% | 3054 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 57,392 psi | 88% | 3064 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 55,347 psi | 85% | 2982 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,972 psi | 89% | 3061 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 57,392 psi | 88% | 3045 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 58,088 psi | 89% | 3176 fps | 99% |
| ADI AR 2225 | <<locked>> | 96% | 56,826 psi | 87% | 3064 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 55,593 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 58,624 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 58,320 psi | 90% | 3051 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,536 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,319 psi | 88% | 3031 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,319 psi | 88% | 3038 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,724 psi | 86% | 3074 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,506 psi | 85% | 3064 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 58,117 psi | 89% | 3022 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 57,754 psi | 89% | 3041 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,130 psi | 88% | 3054 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 58,320 psi | 90% | 3051 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,853 psi | 84% | 3002 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,565 psi | 87% | 2989 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,651 psi | 86% | 2976 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 90% | 57,029 psi | 88% | 3127 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 58% | 1932 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,623 psi | 87% | 2966 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,652 psi | 87% | 3045 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,666 psi | 86% | 3045 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,086 psi | 86% | 2923 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,058 psi | 88% | 3068 fps | 100% |
| Norma MRP | <<locked>> | 84% | 58,639 psi | 90% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 58,059 psi | 89% | 3071 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 56,318 psi | 87% | 2992 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,001 psi | 60% | 1978 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 58,059 psi | 89% | 3114 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,869 psi | 88% | 3077 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 55,608 psi | 86% | 2953 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 58,552 psi | 90% | 3025 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,547 psi | 79% | 2927 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 58,175 psi | 90% | 3018 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,956 psi | 88% | 2946 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 58,711 psi | 90% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,969 psi | 85% | 2920 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 58,204 psi | 90% | 3012 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 84% | 58,001 psi | 89% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,928 psi | 89% | 3074 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 55,317 psi | 85% | 3009 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 57,319 psi | 88% | 3084 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 54,839 psi | 84% | 3081 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,798 psi | 89% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 58,726 psi | 90% | 2992 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% | 47,137 psi | 73% | 2776 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,905 psi | 71% | 2844 fps | 95.4% |
| Accurate High Country | <<locked>> | 80% | 52,460 psi | 81% | 2986 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 49,719 psi | 77% | 2930 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 51,779 psi | 80% | 2923 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,891 psi | 72% | 2864 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 34,824 psi | 54% | 2592 fps | 95.9% |
| ADI AR 2218 | 80.6 gr | 92% | 46,151 psi | 71% | 2943 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 32,097 psi | 49% | 2559 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,895 psi | 80% | 2917 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,387 psi | 79% | 2910 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,529 psi | 73% | 2864 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,325 psi | 71% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,582 psi | 62% | 2740 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,127 psi | 82% | 2972 fps | 100% |
| Alliant Reloder-33 | 78.5 gr | 88% | 44,251 psi | 68% | 2854 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,601 psi | 73% | 2913 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,686 psi | 69% | 2772 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 44,237 psi | 68% | 2799 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 37,623 psi | 58% | 2667 fps | 97% |
| Bofors RP5 | <<locked>> | 80% | 47,529 psi | 73% | 2864 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 38,072 psi | 59% | 2677 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 49,371 psi | 76% | 2864 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,370 psi | 74% | 2844 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 39,653 psi | 61% | 2792 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 44% | 1729 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,937 psi | 77% | 2851 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 45,716 psi | 70% | 2848 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,127 psi | 53% | 2595 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 40,480 psi | 62% | 2648 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,863 psi | 46% | 2487 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 50,937 psi | 78% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,325 psi | 71% | 2867 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 41,669 psi | 64% | 2733 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,225 psi | 45% | 1768 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,030 psi | 60% | 2766 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,740 psi | 60% | 2720 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 52,127 psi | 80% | 2890 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 51,126 psi | 79% | 2900 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 48,008 psi | 74% | 2861 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,778 psi | 78% | 2897 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,142 psi | 82% | 2884 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 51,285 psi | 79% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,034 psi | 69% | 2746 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 50,618 psi | 78% | 2877 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 50,923 psi | 78% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,430 psi | 78% | 2940 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 41,858 psi | 64% | 2749 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 39,885 psi | 61% | 2736 fps | 95.5% |
| Vihtavuori N570 | 75.5 gr | 88% | 47,253 psi | 73% | 2933 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,948 psi | 71% | 2861 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,558 psi | 73% | 2805 fps | 99.6% |
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 52 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 139gr | Fox Classic Hunter. ADI AR 2218 delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,176 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:8.0 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, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 139gr | Fox Classic Hunter 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.