Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 156gr | Norma ORYX bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 57,072 psi | 88% | 2799 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,216 psi | 85% | 2907 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,086 psi | 86% | 2913 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 86% | 58,305 psi | 90% | 2884 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,855 psi | 87% | 2907 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 55,317 psi | 85% | 2884 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,593 psi | 86% | 3012 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,117 psi | 89% | 2963 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 58,668 psi | 90% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,624 psi | 90% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,030 psi | 89% | 2877 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,290 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,376 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,434 psi | 85% | 2877 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,883 psi | 86% | 2890 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,145 psi | 88% | 2986 fps | 99.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,620 psi | 81% | 2913 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,232 psi | 88% | 2871 fps | 99.1% |
| Bofors RP15 | <<locked>> | 90% | 56,463 psi | 87% | 2887 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,463 psi | 85% | 2900 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,290 psi | 88% | 2900 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,942 psi | 88% | 2907 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,912 psi | 86% | 2838 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,668 psi | 90% | 2877 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,755 psi | 90% | 2779 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,595 psi | 90% | 3025 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 58% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,942 psi | 88% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,624 psi | 89% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,173 psi | 86% | 2815 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 88% | 55,274 psi | 85% | 2890 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,465 psi | 90% | 2822 fps | 96.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,200 psi | 82% | 2890 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 55,448 psi | 85% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,407 psi | 90% | 2864 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,215 psi | 83% | 2907 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,305 psi | 88% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,362 psi | 87% | 2910 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,392 psi | 90% | 2858 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,621 psi | 84% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,827 psi | 60% | 1824 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,245 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,624 psi | 90% | 2989 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 58,813 psi | 90% | 2854 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 57,740 psi | 89% | 2867 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 46,050 psi | 71% | 2720 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,348 psi | 88% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,652 psi | 87% | 2799 fps | 99.9% |
| Somchem S365 | <<locked>> | 82% | 57,174 psi | 88% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,015 psi | 89% | 2835 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,885 psi | 89% | 2822 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,000 psi | 88% | 2858 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 86% | 57,363 psi | 88% | 2828 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,724 psi | 87% | 2920 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 57,638 psi | 89% | 2913 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 55,129 psi | 85% | 2930 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 56,391 psi | 87% | 2992 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,376 psi | 85% | 2894 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,827 psi | 89% | 2835 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 43,787 psi | 67% | 2592 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 48,051 psi | 74% | 2785 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 45,469 psi | 70% | 2730 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 47,805 psi | 74% | 2720 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 43,033 psi | 66% | 2667 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 80% | 32,126 psi | 49% | 2421 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 92% | 41,568 psi | 64% | 2730 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 29,472 psi | 45% | 2395 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,153 psi | 74% | 2717 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,071 psi | 85% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,703 psi | 73% | 2713 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,787 psi | 67% | 2674 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,612 psi | 66% | 2605 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,898 psi | 57% | 2559 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,399 psi | 74% | 2779 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 39,552 psi | 61% | 2664 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 94% | 42,076 psi | 65% | 2713 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,553 psi | 64% | 2585 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 40,785 psi | 63% | 2612 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 34,403 psi | 53% | 2497 fps | 97% |
| Bofors RP5 | <<locked>> | 80% | 43,787 psi | 67% | 2674 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 34,998 psi | 54% | 2497 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 45,687 psi | 70% | 2667 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,817 psi | 69% | 2651 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,895 psi | 80% | 2687 fps | 100% |
| Hodgdon Retumbo | 55.2 gr | 80% | 36,056 psi | 55% | 2608 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1588 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,417 psi | 82% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,244 psi | 83% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,557 psi | 72% | 2651 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 41,959 psi | 65% | 2654 fps | 98.7% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,781 psi | 84% | 2766 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 30,951 psi | 48% | 2431 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 38,000 psi | 58% | 2480 fps | 99.9% |
| Norma 204 | <<locked>> | 80% | 54,418 psi | 84% | 2805 fps | 100% |
| Norma 217 | <<locked>> | 80% | 27,238 psi | 42% | 2343 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 46,528 psi | 72% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,148 psi | 65% | 2671 fps | 99% |
| Ramshot Hunter | <<locked>> | 80% | 54,520 psi | 84% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,840 psi | 58% | 2549 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,225 psi | 45% | 1631 fps | 100% |
| ReloadSwiss RS 76 | 59.1 gr | 80% | 35,230 psi | 54% | 2582 fps | 99.5% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 34,751 psi | 53% | 2539 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 48,747 psi | 75% | 2694 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 47,413 psi | 73% | 2703 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 43,018 psi | 66% | 2661 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,065 psi | 72% | 2700 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 49,501 psi | 76% | 2684 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 53,461 psi | 82% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,761 psi | 73% | 2677 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 41,756 psi | 64% | 2562 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 46,644 psi | 72% | 2680 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 47,398 psi | 73% | 2680 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,195 psi | 71% | 2743 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 38,464 psi | 59% | 2569 fps | 97.5% |
| Vihtavuori N568 | <<locked>> | 82% | 36,114 psi | 56% | 2559 fps | 95.4% |
| Vihtavuori N570 | 63.1 gr | 88% | 42,482 psi | 65% | 2736 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,973 psi | 63% | 2671 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,106 psi | 68% | 2615 fps | 99.6% |
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 59 powders for 6.5 Weatherby RPM loaded with the .264 | 156gr | Norma ORYX. Hodgdon Retumbo delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,025 fps. ADI AR 2218 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5 Weatherby RPM with the .264 | 156gr | Norma ORYX 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.