Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Speer Hot-Cor 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% | 57,899 psi | 89% | 2936 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,215 psi | 83% | 2982 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 82% | 57,145 psi | 88% | 3048 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,552 psi | 90% | 3022 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,696 psi | 89% | 3041 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,479 psi | 88% | 3035 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,349 psi | 90% | 3166 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 57,435 psi | 88% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,146 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,247 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,695 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,566 psi | 89% | 3018 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,246 psi | 87% | 3071 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,521 psi | 87% | 3064 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,551 psi | 89% | 3002 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,667 psi | 89% | 3028 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,435 psi | 88% | 3041 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,247 psi | 90% | 3035 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,897 psi | 84% | 2989 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,028 psi | 86% | 2969 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,158 psi | 85% | 2956 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,493 psi | 88% | 3114 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,072 psi | 59% | 1939 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,999 psi | 86% | 2946 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,304 psi | 87% | 3025 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,421 psi | 90% | 2963 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,347 psi | 87% | 3038 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,565 psi | 87% | 2917 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,943 psi | 89% | 3061 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,639 psi | 90% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 58,001 psi | 89% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,420 psi | 87% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,218 psi | 60% | 1985 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,334 psi | 90% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,276 psi | 88% | 3071 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 58,624 psi | 90% | 2989 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 58,218 psi | 90% | 3005 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,796 psi | 86% | 2989 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,856 psi | 89% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,392 psi | 90% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,494 psi | 90% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,146 psi | 89% | 2999 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 82% | 58,378 psi | 90% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,856 psi | 89% | 3058 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,492 psi | 85% | 2995 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,667 psi | 89% | 3074 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 55,361 psi | 85% | 3074 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,334 psi | 90% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,320 psi | 90% | 2972 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% | 50,705 psi | 78% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,702 psi | 72% | 2844 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 53,301 psi | 82% | 2979 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 54,766 psi | 84% | 2959 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,328 psi | 77% | 2917 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,753 psi | 58% | 2654 fps | 97.3% |
| ADI AR 2218 | 79.9 gr | 88% | 43,192 psi | 66% | 2861 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 35,085 psi | 54% | 2625 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,534 psi | 84% | 2953 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,068 psi | 79% | 2917 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,632 psi | 76% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,787 psi | 67% | 2785 fps | 100% |
| Alliant Reloder-33 | 79.5 gr | 86% | 44,933 psi | 69% | 2851 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,382 psi | 70% | 2848 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,340 psi | 73% | 2818 fps | 97.1% |
| Bofors RP15 | <<locked>> | 80% | 47,529 psi | 73% | 2851 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 40,988 psi | 63% | 2730 fps | 98.2% |
| Bofors RP5 | <<locked>> | 80% | 51,068 psi | 79% | 2917 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 41,176 psi | 63% | 2733 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 80% | 52,417 psi | 81% | 2907 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,619 psi | 79% | 2894 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,178 psi | 66% | 2854 fps | 99.8% |
| 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% | 49,095 psi | 76% | 2900 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,781 psi | 84% | 2900 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 82% | 35,027 psi | 54% | 2602 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 43,830 psi | 67% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,286 psi | 51% | 2566 fps | 97.4% |
| Norma MRP | <<locked>> | 80% | 54,665 psi | 84% | 2986 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,111 psi | 77% | 2923 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,208 psi | 70% | 2789 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,457 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,917 psi | 66% | 2828 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,465 psi | 61% | 2720 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 55,158 psi | 85% | 2933 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,476 psi | 84% | 2946 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,484 psi | 70% | 2799 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,128 psi | 83% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,781 psi | 84% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,109 psi | 74% | 2792 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,413 psi | 73% | 2805 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 54,679 psi | 84% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,954 psi | 83% | 2992 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,382 psi | 70% | 2808 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 40,495 psi | 62% | 2736 fps | 96% |
| Vihtavuori N570 | 74.7 gr | 84% | 44,556 psi | 69% | 2861 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,154 psi | 77% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,836 psi | 78% | 2851 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 | Speer Hot-Cor. ADI AR 2218 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,166 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 1:10.5 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 | Speer Hot-Cor 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.