Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Nosler AccuBond bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and ReloadSwiss RS 80.
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% | 56,927 psi | 88% | 2923 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,736 psi | 81% | 2959 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 82% | 55,956 psi | 86% | 3028 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 57,522 psi | 89% | 3005 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,463 psi | 87% | 3025 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 56,115 psi | 86% | 3012 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,666 psi | 87% | 3140 fps | 99% |
| ADI AR 2225 | <<locked>> | 94% | 56,014 psi | 86% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,203 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,029 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,434 psi | 85% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,347 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,810 psi | 84% | 3045 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,897 psi | 84% | 3038 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,449 psi | 87% | 2982 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 56,695 psi | 87% | 3012 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,260 psi | 87% | 3025 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,029 psi | 88% | 3018 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 57,479 psi | 88% | 3031 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,085 psi | 85% | 2953 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,783 psi | 89% | 2999 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,115 psi | 86% | 3097 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 59% | 1936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 58,784 psi | 90% | 2989 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,317 psi | 85% | 3012 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,522 psi | 89% | 2946 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 58,740 psi | 90% | 3081 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,376 psi | 85% | 2900 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,507 psi | 87% | 3045 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,421 psi | 88% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,710 psi | 87% | 3035 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,056 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,088 psi | 60% | 1978 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,826 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,999 psi | 86% | 3051 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 57,682 psi | 89% | 2976 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,174 psi | 88% | 2989 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,520 psi | 84% | 2969 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,811 psi | 87% | 2986 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,217 psi | 88% | 2956 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,392 psi | 88% | 2946 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,985 psi | 88% | 2979 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 57,058 psi | 88% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,652 psi | 87% | 3038 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 58,102 psi | 89% | 3038 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 56,362 psi | 87% | 3054 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 92% | 57,899 psi | 89% | 3120 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,855 psi | 88% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,217 psi | 88% | 2956 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% | 49,719 psi | 77% | 2808 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 45,426 psi | 70% | 2822 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 52,141 psi | 80% | 2963 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 80% | 53,969 psi | 83% | 2946 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,110 psi | 76% | 2897 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 36,898 psi | 57% | 2638 fps | 97% |
| ADI AR 2218 | 80.2 gr | 90% | 45,426 psi | 70% | 2913 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 34,243 psi | 53% | 2605 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,563 psi | 82% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,850 psi | 77% | 2897 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,762 psi | 75% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,946 psi | 66% | 2772 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,758 psi | 67% | 2831 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 92% | 47,398 psi | 73% | 2894 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,572 psi | 72% | 2802 fps | 96.8% |
| Bofors RP15 | <<locked>> | 80% | 46,528 psi | 72% | 2831 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 40,030 psi | 62% | 2713 fps | 97.9% |
| Bofors RP5 | <<locked>> | 80% | 49,850 psi | 77% | 2897 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 40,219 psi | 62% | 2717 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 51,503 psi | 79% | 2894 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,488 psi | 78% | 2874 fps | 99.2% |
| Hodgdon Retumbo | 67.3 gr | 80% | 42,105 psi | 65% | 2835 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 44% | 1729 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,880 psi | 80% | 2874 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 48,051 psi | 74% | 2884 fps | 99.2% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,853 psi | 83% | 2884 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,127 psi | 53% | 2582 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 43,004 psi | 66% | 2687 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,343 psi | 50% | 2546 fps | 97% |
| Norma MRP | <<locked>> | 80% | 53,432 psi | 82% | 2969 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,834 psi | 75% | 2900 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 44,077 psi | 68% | 2769 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 45% | 1772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,713 psi | 64% | 2812 fps | 99.9% |
| ReloadSwiss RS 80 | 72.6 gr | 80% | 38,435 psi | 59% | 2700 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 54,186 psi | 83% | 2917 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 53,432 psi | 82% | 2930 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 47,398 psi | 73% | 2838 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,084 psi | 82% | 2923 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,606 psi | 83% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,210 psi | 73% | 2776 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 86% | 49,850 psi | 77% | 2854 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 53,577 psi | 82% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,779 psi | 81% | 2972 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 44,309 psi | 68% | 2789 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 80% | 39,407 psi | 61% | 2713 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 86% | 46,775 psi | 72% | 2910 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,921 psi | 75% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,719 psi | 77% | 2831 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 | Nosler AccuBond. ADI AR 2218 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,140 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 1:9.0 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. Hodgdon Retumbo, ADI AR 2218, ReloadSwiss RS 80 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 140gr | Nosler AccuBond 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.