Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | CutEdge MTH 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, ReloadSwiss RS 80 and Vihtavuori N568.
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>> | 88% | 57,406 psi | 88% | 3133 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,651 psi | 86% | 3232 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 86% | 56,739 psi | 87% | 3238 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 84% | 54,984 psi | 85% | 3166 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 88% | 57,522 psi | 89% | 3245 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 96% | 56,449 psi | 87% | 3219 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,985 psi | 88% | 3330 fps | 97.6% |
| ADI AR 2225 | <<locked>> | 98% | 55,405 psi | 85% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,378 psi | 90% | 3219 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,827 psi | 89% | 3235 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,898 psi | 86% | 3143 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,275 psi | 87% | 3212 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,478 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,491 psi | 84% | 3228 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,001 psi | 89% | 3199 fps | 97.8% |
| Bofors RP15 | <<locked>> | 90% | 57,000 psi | 88% | 3222 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 55,956 psi | 86% | 3222 fps | 99.6% |
| Bofors RP5 | <<locked>> | 88% | 57,827 psi | 89% | 3235 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 57,899 psi | 89% | 3241 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 56,246 psi | 87% | 3169 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,347 psi | 85% | 3153 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,100 psi | 85% | 3074 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,637 psi | 86% | 3301 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 58% | 2073 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,072 psi | 88% | 3143 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,711 psi | 89% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,666 psi | 87% | 3150 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 88% | 55,840 psi | 86% | 3222 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,230 psi | 83% | 3202 fps | 99.4% |
| Lovex S071 | <<locked>> | 92% | 55,361 psi | 85% | 3100 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,711 psi | 90% | 3209 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 55,303 psi | 85% | 3228 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,870 psi | 89% | 3251 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,276 psi | 88% | 3251 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 58,697 psi | 90% | 3202 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 55,651 psi | 86% | 3169 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,638 psi | 59% | 2123 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,666 psi | 87% | 3287 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,782 psi | 86% | 3241 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 84% | 55,521 psi | 85% | 3136 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 58,015 psi | 89% | 3209 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,624 psi | 89% | 3202 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 56,884 psi | 88% | 3123 fps | 99.1% |
| Somchem S365 | <<locked>> | 82% | 57,261 psi | 88% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,378 psi | 90% | 3173 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,523 psi | 90% | 3163 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,696 psi | 89% | 3173 fps | 96% |
| Vihtavuori N555 | <<locked>> | 86% | 57,566 psi | 89% | 3173 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,305 psi | 88% | 3251 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 92% | 58,407 psi | 90% | 3241 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 56,159 psi | 86% | 3245 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 96% | 57,725 psi | 89% | 3310 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,144 psi | 86% | 3225 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,494 psi | 90% | 3173 fps | 99.9% |
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% | 43,453 psi | 67% | 2881 fps | 99.6% |
| Accurate High Country | <<locked>> | 80% | 48,051 psi | 74% | 3084 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 80% | 45,600 psi | 70% | 3018 fps | 96.3% |
| ADI AR 2209 | <<locked>> | 80% | 47,863 psi | 74% | 3031 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 43,062 psi | 66% | 2959 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 86% | 39,450 psi | 61% | 2867 fps | 96% |
| ADI AR 2218 | <<locked>> | 96% | 48,892 psi | 75% | 3163 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 82% | 31,343 psi | 48% | 2680 fps | 95.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,776 psi | 74% | 3022 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,729 psi | 67% | 2963 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,453 psi | 65% | 2904 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,724 psi | 57% | 2825 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,530 psi | 75% | 3087 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 50,473 psi | 78% | 3150 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,471 psi | 73% | 2999 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 40,741 psi | 63% | 2890 fps | 97.2% |
| Bofors RP30 | <<locked>> | 84% | 39,494 psi | 61% | 2877 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 43,729 psi | 67% | 2963 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 82% | 37,420 psi | 58% | 2818 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 45,745 psi | 70% | 2966 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,817 psi | 69% | 2946 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,648 psi | 79% | 3022 fps | 100% |
| Hodgdon Retumbo | 68.1 gr | 80% | 35,940 psi | 55% | 2858 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 43% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,476 psi | 82% | 3081 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 54,157 psi | 83% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,557 psi | 72% | 2956 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 41,858 psi | 64% | 2936 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 38,072 psi | 59% | 2854 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 37,246 psi | 57% | 2740 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 54,679 psi | 84% | 3140 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 33,373 psi | 51% | 2746 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 46,586 psi | 72% | 3041 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 42,105 psi | 65% | 2953 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 80% | 54,708 psi | 84% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,811 psi | 58% | 2812 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1903 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,302 psi | 54% | 2828 fps | 97.3% |
| ReloadSwiss RS 80 | 80.8 gr | 88% | 44,150 psi | 68% | 3009 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,530 psi | 75% | 3005 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 47,355 psi | 73% | 3012 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,021 psi | 72% | 3005 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 49,661 psi | 76% | 2995 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 53,432 psi | 82% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,616 psi | 73% | 2982 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 41,669 psi | 64% | 2848 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 92% | 53,780 psi | 83% | 3104 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 47,065 psi | 72% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,238 psi | 71% | 3035 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 82% | 41,118 psi | 63% | 2894 fps | 95.8% |
| Vihtavuori N568 | 78.1 gr | 88% | 45,078 psi | 69% | 3022 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 92% | 49,632 psi | 76% | 3156 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,002 psi | 63% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,961 psi | 68% | 2907 fps | 98.2% |
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 | 120gr | CutEdge MTH. ADI AR 2218 delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,330 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 120.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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 80, Vihtavuori N568 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 120gr | CutEdge MTH 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.