Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 100gr | Fox Classic Hunter bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Vihtavuori N560.
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>> | 90% | 56,550 psi | 87% | 3343 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,797 psi | 87% | 3383 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,347 psi | 85% | 3428 fps | 97% |
| ADI AR 2209 | <<locked>> | 88% | 57,957 psi | 89% | 3442 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 90% | 56,101 psi | 86% | 3442 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,798 psi | 90% | 3474 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,316 psi | 82% | 3425 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,711 psi | 89% | 3448 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,493 psi | 88% | 3428 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,507 psi | 87% | 3438 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,218 psi | 90% | 3415 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,378 psi | 90% | 3484 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,013 psi | 85% | 3435 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,116 psi | 88% | 3389 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 55,869 psi | 86% | 3425 fps | 99% |
| Bofors RP30 | <<locked>> | 98% | 58,349 psi | 90% | 3484 fps | 99% |
| Bofors RP5 | <<locked>> | 90% | 56,507 psi | 87% | 3438 fps | 99.2% |
| Bofors RP7 | <<locked>> | 82% | 57,986 psi | 89% | 3379 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 96% | 56,362 psi | 87% | 3438 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 82% | 58,102 psi | 89% | 3435 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 55,550 psi | 85% | 3373 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,233 psi | 90% | 3422 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,943 psi | 89% | 3360 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,290 psi | 88% | 3566 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 57% | 2247 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,492 psi | 87% | 3360 fps | 99.6% |
| IMR 4831 | <<locked>> | 84% | 56,985 psi | 88% | 3369 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,144 psi | 86% | 3356 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 92% | 58,450 psi | 90% | 3491 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,559 psi | 75% | 3304 fps | 96.9% |
| Lovex S065 | <<locked>> | 82% | 56,797 psi | 87% | 3346 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,726 psi | 90% | 3399 fps | 99.9% |
| Lovex S071 | <<locked>> | 96% | 58,131 psi | 89% | 3369 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,015 psi | 89% | 3425 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 49,371 psi | 76% | 3340 fps | 99% |
| Norma MRP | <<locked>> | 88% | 56,724 psi | 87% | 3461 fps | 99.8% |
| Norma URP | <<locked>> | 84% | 58,639 psi | 90% | 3422 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,434 psi | 85% | 3442 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 84% | 57,856 psi | 89% | 3425 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,407 psi | 90% | 3435 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 59% | 2300 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,130 psi | 88% | 3402 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,608 psi | 86% | 3425 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,389 psi | 84% | 3481 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,494 psi | 90% | 3504 fps | 98% |
| Rottweil R 904 | <<locked>> | 88% | 58,552 psi | 90% | 3409 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 88% | 57,087 psi | 88% | 3419 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 82% | 57,986 psi | 89% | 3379 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,797 psi | 87% | 3346 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,726 psi | 90% | 3399 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,695 psi | 86% | 3287 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,666 psi | 87% | 3412 fps | 99.2% |
| Somchem S361 | <<locked>> | 86% | 56,550 psi | 87% | 3327 fps | 97.8% |
| Somchem S365 | <<locked>> | 84% | 56,144 psi | 86% | 3366 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,595 psi | 89% | 3386 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 82% | 56,521 psi | 87% | 3350 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,464 psi | 88% | 3363 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 82% | 55,825 psi | 86% | 3350 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,376 psi | 87% | 3386 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,246 psi | 87% | 3451 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 94% | 56,898 psi | 88% | 3432 fps | 98.2% |
| Vihtavuori N568 | <<locked>> | 98% | 58,595 psi | 90% | 3504 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,318 psi | 87% | 3294 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,334 psi | 90% | 3438 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,015 psi | 89% | 3504 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,711 psi | 89% | 3379 fps | 99.3% |
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% | 40,089 psi | 62% | 3009 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 53,040 psi | 82% | 3317 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 47,993 psi | 74% | 3281 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 44,005 psi | 68% | 3159 fps | 96.4% |
| ADI AR 2213 | <<locked>> | 84% | 45,397 psi | 70% | 3219 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 44,425 psi | 68% | 3186 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 35,186 psi | 54% | 2979 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,589 psi | 78% | 3317 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,063 psi | 68% | 3153 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,972 psi | 62% | 3074 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,696 psi | 60% | 3038 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,417 psi | 51% | 2927 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,555 psi | 67% | 3202 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,563 psi | 82% | 3320 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 42,583 psi | 66% | 3140 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 44,150 psi | 68% | 3192 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 39,972 psi | 62% | 3074 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 54,375 psi | 84% | 3314 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 42,235 psi | 65% | 3133 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 54,447 psi | 84% | 3369 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 84% | 48,385 psi | 74% | 3228 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 47,427 psi | 73% | 3205 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,514 psi | 73% | 3176 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 86% | 40,147 psi | 62% | 3169 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 43% | 2018 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,719 psi | 77% | 3232 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 49,980 psi | 77% | 3241 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 46,195 psi | 71% | 3150 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 43,816 psi | 67% | 3189 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 45,411 psi | 70% | 3235 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 53,301 psi | 82% | 3281 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 51,692 psi | 80% | 3268 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 34,345 psi | 53% | 2858 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 50,401 psi | 78% | 3278 fps | 97.9% |
| Norma 217 | <<locked>> | 92% | 36,970 psi | 57% | 3041 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 42,438 psi | 65% | 3163 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 51,372 psi | 79% | 3291 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 43,990 psi | 68% | 3202 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 50,430 psi | 78% | 3284 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 39,682 psi | 61% | 3054 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 44% | 2067 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,301 psi | 82% | 3337 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,721 psi | 80% | 3356 fps | 100% |
| ReloadSwiss RS 76 | 77.9 gr | 84% | 37,014 psi | 57% | 3064 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 49,864 psi | 77% | 3333 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 45,020 psi | 69% | 3136 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,381 psi | 67% | 3136 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 54,375 psi | 84% | 3314 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,301 psi | 82% | 3281 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 51,692 psi | 80% | 3268 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,156 psi | 80% | 3222 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,047 psi | 66% | 3127 fps | 96.3% |
| Somchem S361 | <<locked>> | 80% | 46,137 psi | 71% | 3120 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 48,979 psi | 75% | 3238 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,019 psi | 68% | 3117 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 80% | 52,939 psi | 81% | 3287 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,348 psi | 59% | 2963 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 52,330 psi | 81% | 3287 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,047 psi | 66% | 3130 fps | 99.7% |
| Vihtavuori N560 | 75.6 gr | 84% | 48,791 psi | 75% | 3304 fps | 96% |
| Vihtavuori N565 | <<locked>> | 88% | 46,209 psi | 71% | 3212 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 94% | 50,647 psi | 78% | 3346 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,388 psi | 81% | 3232 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,447 psi | 84% | 3369 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,013 psi | 55% | 3061 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,379 psi | 62% | 3025 fps | 95.4% |
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 66 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 100gr | Fox Classic Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,566 fps; across all powders the maximum-charge window runs from 2,247 fps to 3,566 fps. ADI AR 2217 gives the best case fill at 100 %, and 66 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 100gr | 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.