Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | Lapua ScenarL bullet and 51 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 55,709 psi | 86% | 3104 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 57,595 psi | 89% | 3261 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 86% | 58,653 psi | 90% | 3271 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 84% | 56,637 psi | 87% | 3192 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 86% | 55,332 psi | 85% | 3202 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 58,262 psi | 90% | 3245 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 54,882 psi | 84% | 3284 fps | 97.2% |
| ADI AR 2225 | <<locked>> | 98% | 57,566 psi | 89% | 3264 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,898 psi | 88% | 3189 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,304 psi | 87% | 3179 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,854 psi | 86% | 3199 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,812 psi | 89% | 3166 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 58,436 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,520 psi | 84% | 3189 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,956 psi | 88% | 3271 fps | 97.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,826 psi | 87% | 3251 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,811 psi | 86% | 3156 fps | 97.5% |
| Bofors RP15 | <<locked>> | 88% | 55,303 psi | 85% | 3186 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 58,160 psi | 90% | 3255 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 55,854 psi | 86% | 3199 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 92% | 55,825 psi | 86% | 3205 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 58,131 psi | 89% | 3199 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,971 psi | 88% | 3179 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,898 psi | 88% | 3097 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,653 psi | 89% | 3330 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,811 psi | 58% | 2077 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,624 psi | 90% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 58,175 psi | 90% | 3173 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 88% | 57,624 psi | 89% | 3251 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,449 psi | 87% | 3238 fps | 99.6% |
| Lovex S071 | <<locked>> | 92% | 57,450 psi | 88% | 3130 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,740 psi | 89% | 3264 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,970 psi | 86% | 3215 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,911 psi | 85% | 3205 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 90% | 57,827 psi | 89% | 3202 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,696 psi | 60% | 2123 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,650 psi | 84% | 3251 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 58,102 psi | 89% | 3278 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 84% | 57,087 psi | 88% | 3159 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 84% | 55,999 psi | 86% | 3173 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,622 psi | 86% | 3166 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 58,653 psi | 90% | 3150 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,478 psi | 87% | 3140 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,449 psi | 87% | 3127 fps | 100% |
| Vihtavuori N555 | <<locked>> | 84% | 55,869 psi | 86% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,332 psi | 85% | 3212 fps | 99% |
| Vihtavuori N565 | <<locked>> | 90% | 56,594 psi | 87% | 3209 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 58,349 psi | 90% | 3281 fps | 98.8% |
| Vihtavuori N570 | <<locked>> | 94% | 55,738 psi | 86% | 3271 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 58,479 psi | 90% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,318 psi | 87% | 3136 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% | 45,542 psi | 70% | 2920 fps | 99.8% |
| Accurate High Country | <<locked>> | 80% | 49,980 psi | 77% | 3120 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 80% | 47,471 psi | 73% | 3054 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 80% | 49,530 psi | 76% | 3061 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 44,759 psi | 69% | 2995 fps | 97.3% |
| ADI AR 2217 | <<locked>> | 84% | 38,305 psi | 59% | 2838 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 96% | 50,981 psi | 78% | 3205 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 30,676 psi | 47% | 2657 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,893 psi | 77% | 3061 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,414 psi | 76% | 3051 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,527 psi | 70% | 2999 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,295 psi | 68% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,464 psi | 59% | 2864 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,633 psi | 78% | 3120 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 48,921 psi | 75% | 3114 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 52,750 psi | 81% | 3179 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 48,994 psi | 75% | 3025 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,337 psi | 65% | 2927 fps | 97.7% |
| Bofors RP30 | <<locked>> | 82% | 38,624 psi | 59% | 2854 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 45,527 psi | 70% | 2999 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 80% | 36,245 psi | 56% | 2785 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 47,152 psi | 73% | 2992 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,412 psi | 71% | 2979 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,229 psi | 82% | 3041 fps | 100% |
| Hodgdon Retumbo | 68.7 gr | 80% | 37,521 psi | 58% | 2900 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,326 psi | 44% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 55,042 psi | 85% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,037 psi | 74% | 2982 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 80% | 43,598 psi | 67% | 2976 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 88% | 37,449 psi | 58% | 2835 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 39,102 psi | 60% | 2782 fps | 99% |
| Norma 217 | <<locked>> | 84% | 32,866 psi | 51% | 2726 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 48,501 psi | 75% | 3074 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 43,801 psi | 67% | 2986 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 80% | 39,523 psi | 61% | 2848 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,182 psi | 45% | 1906 fps | 100% |
| ReloadSwiss RS 76 | 73.6 gr | 80% | 37,101 psi | 57% | 2874 fps | 98.1% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 42,859 psi | 66% | 2972 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,111 psi | 77% | 3035 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 48,965 psi | 75% | 3041 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,617 psi | 75% | 3038 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 51,213 psi | 79% | 3018 fps | 98.3% |
| Somchem S385 | <<locked>> | 80% | 49,414 psi | 76% | 3015 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 43,337 psi | 67% | 2881 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 48,907 psi | 75% | 3018 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,051 psi | 74% | 3071 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 80% | 40,089 psi | 62% | 2864 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 86% | 43,874 psi | 68% | 2992 fps | 95.4% |
| Vihtavuori N570 | 82 gr | 92% | 51,793 psi | 80% | 3196 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,207 psi | 66% | 2995 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,629 psi | 70% | 2936 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 51 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 120gr | Lapua ScenarL. Hodgdon Retumbo delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,077 fps to 3,330 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 51 of the 51 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 1:9.5 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 | Lapua ScenarL 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.