Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 112gr | Hammer HHT bullet and 65 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 Ramshot Grand.
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% | 58,552 psi | 90% | 3238 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,755 psi | 90% | 3268 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,797 psi | 87% | 3340 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 88% | 58,102 psi | 89% | 3350 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 56,246 psi | 87% | 3278 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 88% | 54,882 psi | 84% | 3284 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 57,377 psi | 88% | 3320 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,144 psi | 86% | 3337 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,434 psi | 87% | 3271 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,347 psi | 87% | 3274 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,825 psi | 86% | 3261 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,216 psi | 85% | 3278 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,913 psi | 88% | 3251 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,290 psi | 88% | 3320 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,725 psi | 89% | 3337 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,579 psi | 86% | 3330 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,709 psi | 86% | 3238 fps | 96.7% |
| Bofors RP15 | <<locked>> | 92% | 58,233 psi | 90% | 3330 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 56,942 psi | 88% | 3323 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 55,216 psi | 85% | 3278 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 94% | 54,926 psi | 85% | 3278 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 57,725 psi | 89% | 3278 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,782 psi | 87% | 3261 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,434 psi | 87% | 3189 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,420 psi | 87% | 3406 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,434 psi | 58% | 2136 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,682 psi | 90% | 3261 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,419 psi | 85% | 3202 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,044 psi | 89% | 3258 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 57,058 psi | 88% | 3330 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,184 psi | 79% | 3228 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 58,450 psi | 90% | 3232 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,000 psi | 88% | 3228 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,463 psi | 87% | 3205 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,173 psi | 86% | 3255 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 52,069 psi | 80% | 3255 fps | 99.8% |
| Norma MRP | <<locked>> | 86% | 55,129 psi | 85% | 3291 fps | 99.9% |
| Norma URP | <<locked>> | 82% | 57,058 psi | 88% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 58,407 psi | 90% | 3356 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 56,101 psi | 86% | 3251 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,956 psi | 88% | 3278 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 59% | 2188 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 58,262 psi | 90% | 3323 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,609 psi | 89% | 3392 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,985 psi | 88% | 3346 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 86% | 56,884 psi | 88% | 3245 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 55,579 psi | 86% | 3255 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,450 psi | 90% | 3232 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,000 psi | 88% | 3228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,551 psi | 89% | 3182 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,187 psi | 85% | 3248 fps | 99.5% |
| Somchem S361 | <<locked>> | 86% | 58,537 psi | 90% | 3235 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 58,682 psi | 90% | 3255 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,782 psi | 86% | 3219 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 58,537 psi | 90% | 3241 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,825 psi | 86% | 3205 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 57,928 psi | 89% | 3241 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,624 psi | 90% | 3281 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 58,740 psi | 90% | 3366 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 55,564 psi | 86% | 3281 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 96% | 57,203 psi | 88% | 3346 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 98% | 58,769 psi | 90% | 3415 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 58,334 psi | 90% | 3182 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,898 psi | 88% | 3333 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,782 psi | 86% | 3215 fps | 99.6% |
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% | 41,292 psi | 64% | 2917 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 54,795 psi | 84% | 3205 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 45,716 psi | 70% | 3117 fps | 96.9% |
| Accurate MAGPRO | <<locked>> | 82% | 46,470 psi | 72% | 3117 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 45,861 psi | 71% | 3071 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 41,060 psi | 63% | 2992 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 88% | 40,132 psi | 62% | 2959 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 86% | 34,069 psi | 52% | 2838 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,064 psi | 71% | 3068 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,765 psi | 81% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,614 psi | 70% | 3058 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,698 psi | 64% | 2999 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,379 psi | 62% | 2943 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,809 psi | 54% | 2848 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,716 psi | 70% | 3120 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 51,488 psi | 79% | 3248 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 52,112 psi | 80% | 3169 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 38,667 psi | 60% | 2920 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 40,001 psi | 62% | 2969 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 41,698 psi | 64% | 2999 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 84% | 38,087 psi | 59% | 2910 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 43,598 psi | 67% | 2999 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,917 psi | 66% | 2982 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,327 psi | 76% | 3071 fps | 100% |
| Hodgdon Retumbo | 70 gr | 82% | 36,434 psi | 56% | 2946 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 43% | 1916 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,532 psi | 79% | 3133 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 51,808 psi | 80% | 3140 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,802 psi | 69% | 2995 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 42,641 psi | 66% | 3038 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 41,350 psi | 64% | 3015 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 54,969 psi | 85% | 3173 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,374 psi | 82% | 3166 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 35,505 psi | 55% | 2772 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 52,504 psi | 81% | 3189 fps | 99.1% |
| Norma 217 | <<locked>> | 90% | 36,216 psi | 56% | 2900 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 44,295 psi | 68% | 3077 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 53,330 psi | 82% | 3186 fps | 100% |
| Ramshot Grand | 70.3 gr | 80% | 39,653 psi | 61% | 2972 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 52,518 psi | 81% | 3189 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,549 psi | 55% | 2828 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 44% | 1959 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 54,128 psi | 83% | 3255 fps | 100% |
| ReloadSwiss RS 76 | 73.1 gr | 80% | 33,185 psi | 51% | 2835 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 44,817 psi | 69% | 3100 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 46,673 psi | 72% | 3048 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 45,136 psi | 69% | 3048 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,969 psi | 85% | 3173 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,374 psi | 82% | 3166 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,867 psi | 83% | 3120 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,802 psi | 69% | 3041 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 47,718 psi | 73% | 3035 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 51,053 psi | 79% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,600 psi | 70% | 3025 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 54,737 psi | 84% | 3179 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,653 psi | 61% | 2877 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 54,070 psi | 83% | 3179 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,701 psi | 69% | 3028 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,034 psi | 68% | 3064 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 84% | 41,872 psi | 64% | 2989 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 90% | 45,890 psi | 71% | 3120 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 96% | 54,447 psi | 84% | 3333 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,418 psi | 84% | 3123 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,334 psi | 59% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,018 psi | 65% | 2943 fps | 97.1% |
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 65 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 112gr | Hammer HHT. Vihtavuori N570 delivers the highest muzzle velocity at 3,415 fps; across all powders the maximum-charge window runs from 2,136 fps to 3,415 fps. ADI AR 2225 gives the best case fill at 100 %, and 65 of the 65 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 112.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Hodgdon TrailBoss, IMR 8133 Enduron 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, Ramshot Grand rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 112gr | Hammer HHT 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.