Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Hornady InterLock bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-33.
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>> | 84% | 57,624 psi | 89% | 2933 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,867 psi | 83% | 2979 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 82% | 56,913 psi | 88% | 3045 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 58,320 psi | 90% | 3018 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,479 psi | 88% | 3041 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,276 psi | 88% | 3028 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,914 psi | 89% | 3163 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 57,000 psi | 88% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,914 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,001 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,449 psi | 87% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,348 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,854 psi | 86% | 3061 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,130 psi | 86% | 3054 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,377 psi | 88% | 3002 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,450 psi | 88% | 3022 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,188 psi | 88% | 3038 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,001 psi | 89% | 3031 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,653 psi | 90% | 3048 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,796 psi | 86% | 2966 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,682 psi | 90% | 3012 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,232 psi | 88% | 3110 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,101 psi | 59% | 1939 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,796 psi | 86% | 2943 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,072 psi | 86% | 3022 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,276 psi | 90% | 2959 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,927 psi | 86% | 3035 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,333 psi | 87% | 2913 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,725 psi | 89% | 3061 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,204 psi | 90% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,725 psi | 89% | 3051 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,217 psi | 87% | 2976 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,262 psi | 60% | 1985 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,102 psi | 89% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,072 psi | 88% | 3064 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 58,392 psi | 90% | 2986 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,986 psi | 89% | 3002 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,434 psi | 85% | 2982 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,624 psi | 89% | 2999 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,175 psi | 90% | 2969 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,291 psi | 90% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,769 psi | 89% | 2992 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 58,117 psi | 89% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,406 psi | 88% | 3051 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,259 psi | 85% | 2992 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,261 psi | 88% | 3068 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 54,926 psi | 85% | 3064 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,769 psi | 89% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,885 psi | 89% | 2966 fps | 100% |
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% | 50,473 psi | 78% | 2822 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,340 psi | 71% | 2838 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 53,084 psi | 82% | 2976 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 54,752 psi | 84% | 2959 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,096 psi | 77% | 2913 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,565 psi | 58% | 2651 fps | 97.3% |
| ADI AR 2218 | 79.6 gr | 88% | 43,047 psi | 66% | 2858 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 34,882 psi | 54% | 2621 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,302 psi | 84% | 2946 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,836 psi | 78% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,414 psi | 76% | 2828 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,743 psi | 67% | 2785 fps | 100% |
| Alliant Reloder-33 | 79.2 gr | 86% | 44,744 psi | 69% | 2848 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,020 psi | 69% | 2841 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,166 psi | 73% | 2815 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 47,297 psi | 73% | 2844 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 40,756 psi | 63% | 2726 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 50,836 psi | 78% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 40,959 psi | 63% | 2730 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 52,199 psi | 80% | 2904 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,387 psi | 79% | 2890 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,917 psi | 66% | 2851 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,689 psi | 44% | 1736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,547 psi | 81% | 2887 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 48,849 psi | 75% | 2897 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,607 psi | 84% | 2897 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,809 psi | 54% | 2595 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 43,584 psi | 67% | 2697 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,054 psi | 51% | 2562 fps | 97.3% |
| Norma MRP | <<locked>> | 80% | 54,418 psi | 84% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,864 psi | 77% | 2917 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,005 psi | 69% | 2785 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,457 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,685 psi | 66% | 2825 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,247 psi | 60% | 2713 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 54,926 psi | 85% | 2930 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,230 psi | 83% | 2943 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,150 psi | 69% | 2789 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,882 psi | 83% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,563 psi | 84% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,892 psi | 74% | 2789 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,239 psi | 73% | 2802 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 54,418 psi | 84% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,722 psi | 83% | 2989 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,165 psi | 70% | 2805 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 40,103 psi | 62% | 2726 fps | 95.8% |
| Vihtavuori N570 | 74.4 gr | 84% | 44,309 psi | 68% | 2858 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,850 psi | 77% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,618 psi | 78% | 2848 fps | 99.9% |
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 49 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 140gr | Hornady InterLock. ADI AR 2218 delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,163 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 140gr | Hornady InterLock 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.