Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Speer Gold Dot 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% | 57,783 psi | 89% | 2936 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,157 psi | 83% | 2986 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 82% | 57,043 psi | 88% | 3048 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,682 psi | 90% | 3025 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,595 psi | 89% | 3041 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,392 psi | 88% | 3035 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,218 psi | 90% | 3169 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 57,334 psi | 88% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,059 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,146 psi | 89% | 3035 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,594 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,464 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,159 psi | 86% | 3068 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,463 psi | 87% | 3064 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,479 psi | 88% | 3002 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,580 psi | 89% | 3025 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,334 psi | 88% | 3045 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,146 psi | 89% | 3035 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,798 psi | 90% | 3051 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,927 psi | 86% | 2969 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,056 psi | 85% | 2956 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,624 psi | 89% | 3117 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,130 psi | 59% | 1939 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,130 psi | 86% | 2949 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,246 psi | 87% | 3028 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,349 psi | 90% | 2963 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,260 psi | 87% | 3038 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,449 psi | 87% | 2917 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,841 psi | 89% | 3061 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,523 psi | 90% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,885 psi | 89% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,318 psi | 87% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,276 psi | 60% | 1988 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,233 psi | 90% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,203 psi | 88% | 3068 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 58,508 psi | 90% | 2989 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 58,117 psi | 89% | 3005 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,738 psi | 86% | 2989 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,754 psi | 89% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,291 psi | 90% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,407 psi | 90% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,059 psi | 89% | 2999 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 58,262 psi | 90% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,754 psi | 89% | 3058 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,390 psi | 85% | 2995 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,580 psi | 89% | 3071 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 55,274 psi | 85% | 3074 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,175 psi | 90% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,233 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% | 50,604 psi | 78% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,644 psi | 72% | 2844 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 80% | 53,200 psi | 82% | 2979 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 54,897 psi | 84% | 2963 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,227 psi | 77% | 2913 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,695 psi | 58% | 2651 fps | 97.3% |
| ADI AR 2218 | 79.8 gr | 88% | 43,120 psi | 66% | 2858 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 34,998 psi | 54% | 2625 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,433 psi | 84% | 2949 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,966 psi | 78% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,559 psi | 76% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,903 psi | 68% | 2789 fps | 100% |
| Alliant Reloder-33 | 79.4 gr | 86% | 44,860 psi | 69% | 2851 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,295 psi | 70% | 2848 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,253 psi | 73% | 2815 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 47,427 psi | 73% | 2848 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 40,886 psi | 63% | 2730 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 50,966 psi | 78% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 41,075 psi | 63% | 2733 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 80% | 52,359 psi | 81% | 2910 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,532 psi | 79% | 2894 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,062 psi | 66% | 2854 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,732 psi | 44% | 1736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,663 psi | 81% | 2890 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 48,979 psi | 75% | 2900 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,723 psi | 84% | 2900 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,940 psi | 54% | 2598 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 43,729 psi | 67% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,185 psi | 51% | 2566 fps | 97.4% |
| Norma MRP | <<locked>> | 80% | 54,578 psi | 84% | 2986 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,995 psi | 77% | 2920 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,107 psi | 69% | 2785 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,501 psi | 45% | 1778 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,815 psi | 66% | 2828 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,378 psi | 61% | 2717 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 55,056 psi | 85% | 2933 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,360 psi | 84% | 2946 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,411 psi | 70% | 2795 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,056 psi | 83% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,679 psi | 84% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,037 psi | 74% | 2792 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,340 psi | 73% | 2805 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 54,592 psi | 84% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,867 psi | 83% | 2992 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,324 psi | 70% | 2808 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 40,393 psi | 62% | 2733 fps | 96% |
| Vihtavuori N570 | 74.6 gr | 84% | 44,454 psi | 68% | 2858 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,241 psi | 77% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,749 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 Gold Dot. ADI AR 2218 delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,169 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 | Speer Gold Dot 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.