Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Nosler Solid Base bullet and 49 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>> | 84% | 57,638 psi | 89% | 2933 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,635 psi | 83% | 2972 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 82% | 56,898 psi | 88% | 3045 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 58,276 psi | 90% | 3018 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,203 psi | 88% | 3035 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,014 psi | 88% | 3028 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,682 psi | 89% | 3156 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 56,971 psi | 88% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,885 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,769 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,217 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,290 psi | 88% | 3015 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,840 psi | 86% | 3061 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,130 psi | 86% | 3058 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,174 psi | 88% | 2995 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 57,421 psi | 88% | 3025 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,159 psi | 88% | 3041 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,769 psi | 89% | 3028 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,407 psi | 90% | 3045 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,767 psi | 86% | 2966 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,465 psi | 90% | 3009 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,188 psi | 88% | 3110 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,189 psi | 59% | 1939 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,796 psi | 86% | 2943 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,057 psi | 86% | 3025 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,073 psi | 89% | 2956 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,912 psi | 86% | 3035 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,101 psi | 86% | 2910 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,479 psi | 88% | 3054 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,146 psi | 89% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,479 psi | 88% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,941 psi | 86% | 2972 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,175 psi | 60% | 1985 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,841 psi | 89% | 3091 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,855 psi | 88% | 3064 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 58,378 psi | 90% | 2986 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,943 psi | 89% | 3002 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,448 psi | 85% | 2986 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,580 psi | 89% | 2999 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,928 psi | 89% | 2966 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,262 psi | 90% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,769 psi | 89% | 2992 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 57,870 psi | 89% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,377 psi | 88% | 3051 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,042 psi | 85% | 2989 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,232 psi | 88% | 3068 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 58,784 psi | 90% | 3136 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,754 psi | 89% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,870 psi | 89% | 2966 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 50,459 psi | 78% | 2822 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,340 psi | 71% | 2841 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 53,040 psi | 82% | 2979 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 54,505 psi | 84% | 2956 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,850 psi | 77% | 2910 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,376 psi | 58% | 2648 fps | 97.2% |
| ADI AR 2218 | <<locked>> | 88% | 42,844 psi | 66% | 2851 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 34,867 psi | 54% | 2618 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,273 psi | 84% | 2949 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,604 psi | 78% | 2907 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,356 psi | 76% | 2828 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,540 psi | 67% | 2782 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 44,541 psi | 69% | 2844 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,976 psi | 69% | 2841 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,152 psi | 73% | 2815 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 47,065 psi | 72% | 2841 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 40,712 psi | 63% | 2726 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 50,604 psi | 78% | 2907 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 40,741 psi | 63% | 2726 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 52,185 psi | 80% | 2907 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,169 psi | 79% | 2887 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,873 psi | 66% | 2851 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,601 psi | 44% | 1732 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,344 psi | 81% | 2884 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 48,805 psi | 75% | 2897 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,621 psi | 84% | 2897 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,766 psi | 54% | 2595 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 43,555 psi | 67% | 2697 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,011 psi | 51% | 2562 fps | 97.3% |
| Norma MRP | <<locked>> | 80% | 54,186 psi | 83% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,617 psi | 76% | 2917 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 44,788 psi | 69% | 2782 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,515 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,453 psi | 65% | 2822 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,059 psi | 60% | 2710 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 54,694 psi | 84% | 2927 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,201 psi | 83% | 2943 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,150 psi | 69% | 2792 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,853 psi | 83% | 2936 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,331 psi | 84% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,863 psi | 74% | 2789 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,239 psi | 73% | 2802 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 54,375 psi | 84% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,505 psi | 82% | 2986 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 44,962 psi | 69% | 2799 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 40,089 psi | 62% | 2730 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 84% | 44,266 psi | 68% | 2854 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,835 psi | 77% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,401 psi | 78% | 2844 fps | 99.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 56 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 140gr | Nosler Solid Base. ADI AR 2218 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,156 fps. Accurate 8700 gives the best case fill at 100 %, and 56 of the 56 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 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, Hodgdon 50BMG, Hodgdon US 869, 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.