Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 150gr | SUS-TAC HPT 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% | 57,551 psi | 89% | 2841 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,185 psi | 82% | 2890 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 84% | 57,609 psi | 89% | 2966 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,233 psi | 90% | 2927 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,217 psi | 88% | 2949 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,855 psi | 88% | 2940 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,522 psi | 89% | 3074 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 94% | 56,594 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,667 psi | 89% | 2913 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,769 psi | 89% | 2940 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,188 psi | 86% | 2844 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,058 psi | 88% | 2923 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,477 psi | 85% | 2979 fps | 98.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,608 psi | 86% | 2972 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,029 psi | 88% | 2910 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 57,232 psi | 88% | 2933 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,927 psi | 88% | 2949 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,769 psi | 89% | 2940 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,247 psi | 90% | 2953 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,666 psi | 86% | 2877 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,465 psi | 90% | 2920 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,029 psi | 88% | 3018 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,058 psi | 59% | 1860 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,738 psi | 86% | 2851 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,811 psi | 86% | 2930 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,986 psi | 89% | 2867 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,506 psi | 85% | 2946 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,956 psi | 86% | 2818 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,087 psi | 88% | 2966 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,986 psi | 89% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,464 psi | 88% | 2959 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,753 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,276 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,725 psi | 89% | 3005 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,536 psi | 87% | 2976 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 58,276 psi | 90% | 2894 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,653 psi | 89% | 2907 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,056 psi | 85% | 2900 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,290 psi | 88% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,001 psi | 89% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,160 psi | 90% | 2867 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,421 psi | 88% | 2904 fps | 98% |
| Vihtavuori N555 | <<locked>> | 82% | 57,943 psi | 89% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,203 psi | 88% | 2959 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 58,784 psi | 90% | 2963 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,884 psi | 88% | 2979 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 92% | 58,552 psi | 90% | 3051 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,653 psi | 89% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,740 psi | 89% | 2877 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% | 50,270 psi | 77% | 2733 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,743 psi | 66% | 2697 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 50,169 psi | 77% | 2838 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 80% | 54,505 psi | 84% | 2867 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,763 psi | 77% | 2825 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 37,362 psi | 57% | 2572 fps | 97.8% |
| ADI AR 2218 | 75.5 gr | 88% | 42,714 psi | 66% | 2779 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 34,766 psi | 54% | 2549 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,114 psi | 83% | 2858 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,502 psi | 78% | 2822 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,255 psi | 76% | 2740 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,526 psi | 67% | 2703 fps | 100% |
| Alliant Reloder-33 | 73.4 gr | 84% | 41,263 psi | 64% | 2700 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,686 psi | 69% | 2769 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,934 psi | 72% | 2730 fps | 97.5% |
| Bofors RP15 | <<locked>> | 80% | 47,065 psi | 72% | 2762 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,567 psi | 62% | 2651 fps | 98.6% |
| Bofors RP5 | <<locked>> | 80% | 50,502 psi | 78% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,828 psi | 63% | 2654 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 80% | 52,156 psi | 80% | 2822 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,082 psi | 79% | 2799 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,786 psi | 66% | 2769 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 44% | 1663 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,344 psi | 81% | 2799 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 48,689 psi | 75% | 2812 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 51,010 psi | 79% | 2753 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,314 psi | 50% | 2464 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 43,468 psi | 67% | 2615 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,967 psi | 51% | 2497 fps | 98% |
| Norma MRP | <<locked>> | 80% | 54,070 psi | 83% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,690 psi | 76% | 2835 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,730 psi | 69% | 2700 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,472 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,351 psi | 65% | 2746 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,015 psi | 60% | 2641 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 80% | 54,665 psi | 84% | 2838 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 53,998 psi | 83% | 2851 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 44,962 psi | 69% | 2717 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,650 psi | 83% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,230 psi | 83% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,732 psi | 73% | 2703 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 47,079 psi | 72% | 2723 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 54,331 psi | 84% | 2818 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,388 psi | 82% | 2897 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 44,991 psi | 69% | 2723 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 40,016 psi | 62% | 2657 fps | 96.5% |
| Vihtavuori N570 | 70.6 gr | 84% | 44,106 psi | 68% | 2779 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,588 psi | 76% | 2822 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,386 psi | 78% | 2762 fps | 100% |
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 | 150gr | SUS-TAC HPT. ADI AR 2218 delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,074 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 150.0 gr projectile in 0.264" calls for a 1:7.0 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 | 150gr | SUS-TAC HPT 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.