Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | Nosler Ballistic Tip Hunting bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 86% | 55,825 psi | 86% | 3104 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 57,740 psi | 89% | 3264 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 86% | 58,784 psi | 90% | 3271 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 84% | 56,782 psi | 87% | 3192 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 55,448 psi | 85% | 3202 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 58,349 psi | 90% | 3245 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 54,998 psi | 85% | 3284 fps | 97.2% |
| ADI AR 2225 | <<locked>> | 98% | 57,696 psi | 89% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,217 psi | 87% | 3179 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,970 psi | 86% | 3199 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,711 psi | 89% | 3163 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 58,523 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 58,784 psi | 90% | 3255 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,014 psi | 88% | 3271 fps | 97.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,884 psi | 88% | 3255 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,912 psi | 86% | 3156 fps | 97.5% |
| Bofors RP15 | <<locked>> | 88% | 55,216 psi | 85% | 3186 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 58,305 psi | 90% | 3255 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 55,970 psi | 86% | 3199 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 92% | 55,970 psi | 86% | 3202 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 57,972 psi | 89% | 3196 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,101 psi | 88% | 3179 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,811 psi | 87% | 3097 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,798 psi | 89% | 3333 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,753 psi | 58% | 2077 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,769 psi | 90% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 58,262 psi | 90% | 3176 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 88% | 57,769 psi | 89% | 3251 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,579 psi | 87% | 3238 fps | 99.6% |
| Lovex S071 | <<locked>> | 92% | 57,595 psi | 89% | 3130 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,885 psi | 89% | 3264 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,072 psi | 86% | 3215 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,042 psi | 85% | 3205 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 90% | 57,696 psi | 89% | 3199 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,827 psi | 60% | 2126 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,578 psi | 84% | 3248 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 58,233 psi | 90% | 3278 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 57,000 psi | 88% | 3159 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 84% | 56,101 psi | 86% | 3169 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,724 psi | 86% | 3166 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 58,552 psi | 90% | 3146 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,376 psi | 87% | 3140 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,579 psi | 87% | 3127 fps | 100% |
| Vihtavuori N555 | <<locked>> | 84% | 55,767 psi | 86% | 3136 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,448 psi | 85% | 3212 fps | 99% |
| Vihtavuori N565 | <<locked>> | 90% | 56,681 psi | 87% | 3209 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 58,479 psi | 90% | 3281 fps | 98.8% |
| Vihtavuori N570 | <<locked>> | 94% | 55,869 psi | 86% | 3274 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 58,581 psi | 90% | 3258 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,202 psi | 86% | 3133 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% | 45,440 psi | 70% | 2917 fps | 99.8% |
| Accurate High Country | <<locked>> | 80% | 50,096 psi | 77% | 3123 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 80% | 47,384 psi | 73% | 3051 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 80% | 49,632 psi | 76% | 3061 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 44,846 psi | 69% | 2992 fps | 97.3% |
| ADI AR 2217 | <<locked>> | 84% | 38,421 psi | 59% | 2838 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 96% | 51,082 psi | 79% | 3205 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 30,748 psi | 47% | 2657 fps | 95.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,342 psi | 76% | 3048 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,629 psi | 70% | 2999 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,222 psi | 68% | 2933 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,580 psi | 59% | 2864 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,778 psi | 78% | 3120 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 49,037 psi | 75% | 3117 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 52,866 psi | 81% | 3179 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 49,081 psi | 76% | 3028 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,424 psi | 65% | 2927 fps | 97.7% |
| Bofors RP30 | <<locked>> | 82% | 38,551 psi | 59% | 2848 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 45,629 psi | 70% | 2999 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 80% | 36,347 psi | 56% | 2785 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 47,282 psi | 73% | 2995 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,528 psi | 72% | 2979 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,330 psi | 82% | 3045 fps | 100% |
| Hodgdon Retumbo | 68.8 gr | 80% | 37,623 psi | 58% | 2900 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,442 psi | 44% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 55,129 psi | 85% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,138 psi | 74% | 2986 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 80% | 43,526 psi | 67% | 2972 fps | 97% |
| IMR 8133 Enduron | <<locked>> | 88% | 37,376 psi | 58% | 2835 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 39,175 psi | 60% | 2782 fps | 99% |
| Norma 217 | <<locked>> | 84% | 32,953 psi | 51% | 2730 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 48,602 psi | 75% | 3077 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 43,932 psi | 68% | 2989 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 80% | 39,610 psi | 61% | 2848 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 45% | 1906 fps | 100% |
| ReloadSwiss RS 76 | 73.6 gr | 80% | 37,028 psi | 57% | 2871 fps | 98.1% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 42,946 psi | 66% | 2976 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,198 psi | 77% | 3035 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 49,052 psi | 75% | 3041 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,718 psi | 75% | 3035 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 51,285 psi | 79% | 3018 fps | 98.3% |
| Somchem S385 | <<locked>> | 80% | 49,530 psi | 76% | 3015 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 43,265 psi | 67% | 2877 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 49,037 psi | 75% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,138 psi | 74% | 3071 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 80% | 40,190 psi | 62% | 2867 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 86% | 43,961 psi | 68% | 2992 fps | 95.4% |
| Vihtavuori N570 | 82.1 gr | 92% | 51,924 psi | 80% | 3196 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,323 psi | 67% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,759 psi | 70% | 2940 fps | 98.6% |
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 50 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 120gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,333 fps; across all powders the maximum-charge window runs from 2,077 fps to 3,333 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 50 of the 50 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 120.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 120gr | Nosler Ballistic Tip Hunting 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.