Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 123gr | Fox Classic Hunter bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 57,725 psi | 89% | 3104 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 56,231 psi | 87% | 3209 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 86% | 57,159 psi | 88% | 3215 fps | 99% |
| ADI AR 2209 | <<locked>> | 84% | 55,463 psi | 85% | 3143 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 57,885 psi | 89% | 3219 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 56,956 psi | 88% | 3196 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,667 psi | 89% | 3314 fps | 98% |
| ADI AR 2225 | <<locked>> | 98% | 56,014 psi | 86% | 3212 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,666 psi | 86% | 3136 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,071 psi | 85% | 3127 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,189 psi | 90% | 3209 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,231 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,956 psi | 88% | 3189 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,159 psi | 88% | 3202 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,172 psi | 85% | 3212 fps | 97.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,781 psi | 84% | 3192 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,421 psi | 90% | 3176 fps | 98.1% |
| Bofors RP15 | <<locked>> | 90% | 57,580 psi | 89% | 3199 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 56,652 psi | 87% | 3199 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 58,189 psi | 90% | 3209 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 58,392 psi | 90% | 3219 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,739 psi | 87% | 3143 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,622 psi | 86% | 3127 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,695 psi | 86% | 3051 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,144 psi | 86% | 3278 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 58% | 2047 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,464 psi | 88% | 3117 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,320 psi | 90% | 3120 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,101 psi | 88% | 3123 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 56,434 psi | 87% | 3199 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,781 psi | 84% | 3182 fps | 99.5% |
| Lovex S071 | <<locked>> | 92% | 55,869 psi | 86% | 3074 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,912 psi | 86% | 3205 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,508 psi | 90% | 3225 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,725 psi | 89% | 3222 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 90% | 56,130 psi | 86% | 3143 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 59% | 2093 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,319 psi | 88% | 3264 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,449 psi | 87% | 3222 fps | 99% |
| Rottweil R 904 | <<locked>> | 84% | 55,927 psi | 86% | 3110 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 58,537 psi | 90% | 3182 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,146 psi | 89% | 3176 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,377 psi | 88% | 3100 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 57,711 psi | 89% | 3110 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,668 psi | 90% | 3146 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,027 psi | 85% | 3074 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 94% | 58,175 psi | 90% | 3153 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 58,073 psi | 89% | 3143 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,899 psi | 89% | 3228 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 54,998 psi | 85% | 3153 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 94% | 56,724 psi | 87% | 3222 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 58,363 psi | 90% | 3294 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,681 psi | 87% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,911 psi | 85% | 3084 fps | 99.8% |
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% | 43,816 psi | 67% | 2861 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 48,530 psi | 75% | 3061 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 80% | 46,064 psi | 71% | 2999 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 48,414 psi | 75% | 3012 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 43,627 psi | 67% | 2943 fps | 97.2% |
| ADI AR 2217 | <<locked>> | 84% | 37,086 psi | 57% | 2782 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 96% | 49,458 psi | 76% | 3146 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 31,676 psi | 49% | 2667 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,573 psi | 75% | 3005 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,124 psi | 74% | 2999 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,295 psi | 68% | 2946 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,975 psi | 66% | 2884 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,217 psi | 57% | 2808 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,095 psi | 76% | 3064 fps | 100% |
| Alliant Reloder-33 | 85.6 gr | 94% | 51,097 psi | 79% | 3133 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 50,531 psi | 78% | 3107 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,892 psi | 74% | 2979 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 41,075 psi | 63% | 2871 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 37,130 psi | 57% | 2789 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 44,295 psi | 68% | 2946 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 80% | 35,114 psi | 54% | 2730 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 46,108 psi | 71% | 2946 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,353 psi | 70% | 2927 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,967 psi | 80% | 2992 fps | 100% |
| Hodgdon Retumbo | 67.5 gr | 80% | 36,303 psi | 56% | 2841 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 43% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,012 psi | 83% | 3058 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,534 psi | 84% | 3061 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,036 psi | 72% | 2936 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 42,250 psi | 65% | 2917 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 38,580 psi | 59% | 2841 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 37,666 psi | 58% | 2723 fps | 98.7% |
| Norma 217 | <<locked>> | 86% | 33,808 psi | 52% | 2733 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 47,036 psi | 72% | 3018 fps | 99.6% |
| Ramshot Grand | <<locked>> | 80% | 42,554 psi | 65% | 2933 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 80% | 38,247 psi | 59% | 2795 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 45% | 1877 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,578 psi | 55% | 2812 fps | 97.7% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,263 psi | 64% | 2913 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 49,037 psi | 75% | 2982 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 47,732 psi | 73% | 2989 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,384 psi | 73% | 2982 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 50,053 psi | 77% | 2969 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 54,070 psi | 83% | 3054 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,167 psi | 74% | 2963 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 42,003 psi | 65% | 2825 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 54,375 psi | 84% | 3084 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 47,413 psi | 73% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,688 psi | 72% | 3012 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 38,711 psi | 60% | 2808 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 86% | 42,351 psi | 65% | 2930 fps | 95% |
| Vihtavuori N570 | 80.6 gr | 92% | 50,357 psi | 78% | 3140 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,510 psi | 64% | 2933 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,483 psi | 68% | 2887 fps | 98.5% |
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 54 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 123gr | Fox Classic Hunter. ADI AR 2218 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 2,047 fps to 3,314 fps. ADI AR 2218 gives the best case fill at 100 %, and 54 of the 54 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 123.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Alliant Reloder-50, Hodgdon TrailBoss 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. Hodgdon Retumbo, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 123gr | 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.