Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 128gr | Hasler Hunting bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 58,653 psi | 90% | 3081 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,028 psi | 86% | 3061 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,435 psi | 88% | 3192 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 90% | 56,753 psi | 87% | 3123 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 58,378 psi | 90% | 3192 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,692 psi | 81% | 3091 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,224 psi | 73% | 3048 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,855 psi | 87% | 3117 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,943 psi | 89% | 3127 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,173 psi | 86% | 3107 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,494 psi | 90% | 3182 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,333 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,753 psi | 86% | 3159 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,797 psi | 87% | 3186 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,057 psi | 86% | 3087 fps | 97.1% |
| Bofors RP15 | <<locked>> | 96% | 57,638 psi | 89% | 3169 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,434 psi | 85% | 3163 fps | 99.5% |
| Bofors RP5 | <<locked>> | 94% | 58,494 psi | 90% | 3182 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 57,769 psi | 89% | 3058 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,233 psi | 90% | 3182 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 57,595 psi | 89% | 3117 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,173 psi | 86% | 3071 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 58,262 psi | 90% | 3127 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,145 psi | 88% | 3107 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,000 psi | 88% | 3031 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,552 psi | 90% | 3304 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,392 psi | 90% | 3159 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,362 psi | 57% | 1942 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,014 psi | 86% | 3045 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,521 psi | 85% | 3022 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,115 psi | 86% | 3048 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,303 psi | 85% | 3045 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 94% | 56,333 psi | 87% | 3169 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,583 psi | 66% | 2946 fps | 97.2% |
| Lovex S065 | <<locked>> | 84% | 56,376 psi | 87% | 3022 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,305 psi | 90% | 3077 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,057 psi | 86% | 3045 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,087 psi | 88% | 3104 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 42,989 psi | 66% | 2976 fps | 99.2% |
| Norma MRP | <<locked>> | 92% | 58,711 psi | 90% | 3209 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,943 psi | 89% | 3097 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,493 psi | 88% | 3196 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 56,753 psi | 87% | 3104 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,782 psi | 86% | 3120 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,145 psi | 59% | 1988 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,028 psi | 86% | 3081 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,305 psi | 90% | 3169 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,361 psi | 85% | 3232 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,694 psi | 84% | 3186 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 90% | 57,798 psi | 89% | 3091 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 55,956 psi | 86% | 3100 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 57,769 psi | 89% | 3058 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,376 psi | 87% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,305 psi | 90% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,697 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,608 psi | 86% | 2976 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,535 psi | 85% | 3097 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,709 psi | 86% | 3025 fps | 98.7% |
| Somchem S365 | <<locked>> | 86% | 55,013 psi | 85% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,347 psi | 87% | 3068 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,478 psi | 87% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,043 psi | 86% | 3031 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,854 psi | 86% | 3048 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 55,187 psi | 85% | 3035 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,494 psi | 90% | 3123 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,363 psi | 90% | 3205 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 98% | 58,552 psi | 90% | 3189 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,332 psi | 85% | 3186 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,448 psi | 85% | 2982 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,595 psi | 89% | 3117 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,784 psi | 90% | 3238 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,217 psi | 86% | 3064 fps | 99.7% |
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% | 36,724 psi | 56% | 2684 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 48,921 psi | 75% | 2946 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 43,366 psi | 67% | 2927 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 40,669 psi | 63% | 2818 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 38,769 psi | 60% | 2802 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 37,637 psi | 58% | 2772 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 88% | 31,807 psi | 49% | 2667 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,543 psi | 72% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,070 psi | 83% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,741 psi | 63% | 2815 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,448 psi | 56% | 2749 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,244 psi | 54% | 2710 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,603 psi | 47% | 2621 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,885 psi | 60% | 2864 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,647 psi | 76% | 2966 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 36,347 psi | 56% | 2746 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 36,825 psi | 57% | 2789 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 36,448 psi | 56% | 2749 fps | 96.1% |
| Bofors RP7 | <<locked>> | 80% | 50,836 psi | 78% | 2943 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 35,868 psi | 55% | 2726 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 50,401 psi | 78% | 2999 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 52,576 psi | 81% | 3009 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 41,466 psi | 64% | 2812 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,669 psi | 63% | 2795 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,048 psi | 68% | 2822 fps | 100% |
| Hodgdon Retumbo | 57.3 gr | 84% | 34,084 psi | 52% | 2769 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 50,198 psi | 77% | 3025 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 43% | 1739 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,456 psi | 71% | 2877 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,272 psi | 80% | 2969 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,282 psi | 71% | 2884 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,393 psi | 62% | 2753 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 40,001 psi | 62% | 2844 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,333 psi | 57% | 2822 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 49,951 psi | 77% | 2917 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,341 psi | 74% | 2910 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 31,546 psi | 49% | 2552 fps | 96.9% |
| Norma 204 | <<locked>> | 80% | 46,557 psi | 72% | 2920 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 32,663 psi | 50% | 2717 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 38,290 psi | 59% | 2822 fps | 98% |
| Norma URP | <<locked>> | 80% | 47,747 psi | 73% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,956 psi | 57% | 2782 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 46,470 psi | 71% | 2927 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 33,098 psi | 51% | 2661 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 44% | 1775 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,689 psi | 75% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,036 psi | 72% | 2989 fps | 100% |
| ReloadSwiss RS 76 | 59.8 gr | 82% | 30,864 psi | 47% | 2667 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,424 psi | 67% | 2972 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 41,901 psi | 64% | 2795 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 39,929 psi | 61% | 2795 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,836 psi | 78% | 2943 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,951 psi | 77% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,341 psi | 74% | 2910 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,158 psi | 85% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,907 psi | 75% | 2864 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,624 psi | 61% | 2789 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 42,641 psi | 66% | 2779 fps | 96% |
| Somchem S365 | <<locked>> | 80% | 44,976 psi | 69% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,509 psi | 62% | 2776 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 53,084 psi | 82% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,211 psi | 76% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,302 psi | 54% | 2644 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,356 psi | 74% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,479 psi | 61% | 2792 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 41,162 psi | 63% | 2877 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 38,841 psi | 60% | 2808 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 94% | 44,715 psi | 69% | 2986 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,312 psi | 74% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,401 psi | 78% | 2999 fps | 99.8% |
| Winchester StaBALL HD | 56 gr | 80% | 31,488 psi | 48% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,144 psi | 57% | 2697 fps | 96.3% |
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 78 powders for 6.5 Weatherby RPM loaded with the .264 | 128gr | Hasler Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,304 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 128.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 6.5 Weatherby RPM with the .264 | 128gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron 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.