Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | Barnes Solid bullet and 51 powders. The key underlying parameters are shown in the table above.
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>> | 86% | 54,969 psi | 85% | 3091 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 56,884 psi | 88% | 3248 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 86% | 57,943 psi | 89% | 3255 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 84% | 55,956 psi | 86% | 3179 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 58,537 psi | 90% | 3255 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 57,566 psi | 89% | 3232 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 58,436 psi | 90% | 3356 fps | 97.9% |
| ADI AR 2225 | <<locked>> | 98% | 56,652 psi | 87% | 3251 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,608 psi | 86% | 3166 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,143 psi | 85% | 3182 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,087 psi | 88% | 3156 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,682 psi | 89% | 3228 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,870 psi | 89% | 3241 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,854 psi | 86% | 3248 fps | 97.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,767 psi | 86% | 3232 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,114 psi | 85% | 3143 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 58,363 psi | 90% | 3238 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,508 psi | 89% | 3245 fps | 99.7% |
| Bofors RP5 | <<locked>> | 86% | 55,143 psi | 85% | 3182 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 92% | 54,926 psi | 85% | 3189 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 57,464 psi | 88% | 3186 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,333 psi | 87% | 3166 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,362 psi | 87% | 3091 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,826 psi | 87% | 3320 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,782 psi | 58% | 2073 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,957 psi | 89% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,537 psi | 89% | 3159 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 56,898 psi | 88% | 3238 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,608 psi | 86% | 3222 fps | 99.5% |
| Lovex S071 | <<locked>> | 92% | 57,000 psi | 88% | 3123 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,058 psi | 88% | 3255 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,245 psi | 85% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 58,479 psi | 90% | 3268 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 90% | 56,898 psi | 88% | 3186 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 60% | 2119 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 58,030 psi | 89% | 3304 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,261 psi | 88% | 3264 fps | 99% |
| Rottweil R 904 | <<locked>> | 84% | 56,434 psi | 87% | 3150 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 84% | 55,492 psi | 85% | 3159 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,114 psi | 85% | 3153 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 57,856 psi | 89% | 3136 fps | 99.2% |
| Somchem S365 | <<locked>> | 82% | 58,421 psi | 90% | 3150 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 55,811 psi | 86% | 3127 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,825 psi | 86% | 3114 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 84% | 55,100 psi | 85% | 3127 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 58,653 psi | 90% | 3271 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 55,927 psi | 86% | 3196 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 94% | 57,725 psi | 89% | 3268 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 94% | 54,868 psi | 84% | 3258 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,595 psi | 89% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,680 psi | 86% | 3123 fps | 99.8% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 44,875 psi | 69% | 2907 fps | 99.8% |
| Accurate High Country | <<locked>> | 80% | 49,472 psi | 76% | 3107 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 80% | 46,818 psi | 72% | 3041 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 48,994 psi | 75% | 3051 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 44,251 psi | 68% | 2982 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 37,753 psi | 58% | 2822 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 96% | 50,270 psi | 77% | 3189 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 32,460 psi | 50% | 2713 fps | 96.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,733 psi | 75% | 3038 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,020 psi | 69% | 2986 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,772 psi | 67% | 2927 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,985 psi | 58% | 2851 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,893 psi | 77% | 3107 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 48,138 psi | 74% | 3097 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 98% | 51,750 psi | 80% | 3156 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 48,472 psi | 75% | 3015 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 41,858 psi | 64% | 2913 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 37,985 psi | 58% | 2838 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 45,020 psi | 69% | 2986 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 80% | 35,839 psi | 55% | 2772 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 46,731 psi | 72% | 2982 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,977 psi | 71% | 2966 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,663 psi | 81% | 3035 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 37,043 psi | 57% | 2887 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,563 psi | 84% | 3097 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,587 psi | 73% | 2976 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 80% | 42,902 psi | 66% | 2959 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 39,407 psi | 61% | 2887 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 38,754 psi | 60% | 2772 fps | 98.9% |
| Norma 217 | <<locked>> | 84% | 32,256 psi | 50% | 2713 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 47,964 psi | 74% | 3064 fps | 99.6% |
| Ramshot Grand | <<locked>> | 80% | 43,250 psi | 67% | 2976 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 80% | 39,059 psi | 60% | 2838 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 45% | 1900 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,535 psi | 56% | 2858 fps | 97.8% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 42,264 psi | 65% | 2959 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 49,647 psi | 76% | 3022 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 48,457 psi | 75% | 3031 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,109 psi | 74% | 3025 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 50,604 psi | 78% | 3009 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 54,810 psi | 84% | 3097 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,950 psi | 75% | 3005 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 42,714 psi | 66% | 2864 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 48,356 psi | 74% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,543 psi | 73% | 3061 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,610 psi | 61% | 2858 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 86% | 43,265 psi | 67% | 2976 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 92% | 51,169 psi | 79% | 3182 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,409 psi | 65% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,165 psi | 70% | 2927 fps | 98.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 59 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 120gr | Barnes Solid. ADI AR 2218 delivers the highest muzzle velocity at 3,356 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,356 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 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 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, Alliant Reloder-50 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. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.