Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 125gr | Hasler ARIETE bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand and Alliant Reloder-26.
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>> | 94% | 57,392 psi | 88% | 3097 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,610 psi | 90% | 3130 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,130 psi | 86% | 3202 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 55,651 psi | 86% | 3136 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 57,188 psi | 88% | 3202 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,561 psi | 79% | 3100 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,151 psi | 71% | 3058 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,738 psi | 86% | 3133 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,753 psi | 87% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,114 psi | 85% | 3120 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,290 psi | 88% | 3196 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,769 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,088 psi | 89% | 3228 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,405 psi | 85% | 3202 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,639 psi | 90% | 3156 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 56,449 psi | 87% | 3182 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,128 psi | 83% | 3173 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 57,290 psi | 88% | 3196 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 56,811 psi | 87% | 3074 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,956 psi | 88% | 3192 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 56,521 psi | 87% | 3133 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,187 psi | 85% | 3084 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,159 psi | 88% | 3136 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,028 psi | 86% | 3120 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,898 psi | 86% | 3048 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,145 psi | 88% | 3314 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,942 psi | 88% | 3169 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,159 psi | 57% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,769 psi | 90% | 3117 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,291 psi | 90% | 3097 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,042 psi | 85% | 3061 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,740 psi | 89% | 3114 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 55,129 psi | 85% | 3179 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,524 psi | 64% | 2949 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 55,434 psi | 85% | 3038 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,305 psi | 88% | 3094 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,581 psi | 90% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,028 psi | 86% | 3117 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 41,843 psi | 64% | 2979 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 57,421 psi | 88% | 3222 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,855 psi | 87% | 3110 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,144 psi | 86% | 3205 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 55,651 psi | 86% | 3117 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 58,682 psi | 90% | 3192 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,130 psi | 59% | 2008 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,740 psi | 90% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,072 psi | 88% | 3186 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,392 psi | 90% | 3314 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,939 psi | 81% | 3189 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 82% | 58,378 psi | 90% | 3071 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,782 psi | 87% | 3104 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 58,407 psi | 90% | 3173 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 56,811 psi | 87% | 3074 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,434 psi | 85% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,305 psi | 88% | 3094 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,798 psi | 89% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,160 psi | 89% | 3045 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,972 psi | 89% | 3166 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 57,870 psi | 89% | 3061 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,378 psi | 90% | 3094 fps | 98.9% |
| Somchem S365 | <<locked>> | 88% | 57,711 psi | 89% | 3114 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,274 psi | 85% | 3084 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,506 psi | 85% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,537 psi | 90% | 3100 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,595 psi | 90% | 3120 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 57,841 psi | 89% | 3110 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,276 psi | 88% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,072 psi | 88% | 3219 fps | 99% |
| Vihtavuori N565 | <<locked>> | 98% | 56,971 psi | 88% | 3192 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,940 psi | 83% | 3196 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,407 psi | 90% | 3054 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,521 psi | 87% | 3133 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,130 psi | 88% | 3251 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,071 psi | 85% | 3077 fps | 99.5% |
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% | 35,882 psi | 55% | 2694 fps | 98.1% |
| Accurate 4350 | <<locked>> | 80% | 47,935 psi | 74% | 2959 fps | 100% |
| Accurate MAGPRO | 60.5 gr | 84% | 42,366 psi | 65% | 2933 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 39,842 psi | 61% | 2828 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 40,698 psi | 63% | 2877 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 92% | 39,291 psi | 60% | 2838 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 88% | 31,082 psi | 48% | 2667 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,600 psi | 70% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,939 psi | 81% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,914 psi | 61% | 2822 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,592 psi | 55% | 2756 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,389 psi | 53% | 2720 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,936 psi | 46% | 2625 fps | 96.7% |
| Alliant Reloder-26 | 58.2 gr | 80% | 37,840 psi | 58% | 2871 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,880 psi | 80% | 3035 fps | 95.8% |
| Bofors RP15 | <<locked>> | 82% | 35,505 psi | 55% | 2749 fps | 95.2% |
| Bofors RP30 | <<locked>> | 90% | 38,363 psi | 59% | 2854 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 35,592 psi | 55% | 2756 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 50,256 psi | 77% | 2963 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 37,637 psi | 58% | 2799 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 49,414 psi | 76% | 3012 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 51,648 psi | 79% | 3022 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 82% | 40,611 psi | 62% | 2818 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,685 psi | 66% | 2864 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,120 psi | 66% | 2838 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 35,520 psi | 55% | 2838 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,124 psi | 76% | 3038 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 43% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,614 psi | 70% | 2890 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,430 psi | 79% | 2982 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,339 psi | 70% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,177 psi | 65% | 2822 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 39,146 psi | 60% | 2851 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,885 psi | 60% | 2884 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 49,095 psi | 76% | 2930 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,471 psi | 73% | 2923 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 30,806 psi | 47% | 2559 fps | 96.3% |
| Norma 204 | <<locked>> | 80% | 45,701 psi | 70% | 2930 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 31,821 psi | 49% | 2717 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 37,362 psi | 57% | 2828 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 46,804 psi | 72% | 2943 fps | 100% |
| Ramshot Grand | 58.8 gr | 84% | 38,783 psi | 60% | 2858 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 45,542 psi | 70% | 2936 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 32,329 psi | 50% | 2664 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,500 psi | 44% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,659 psi | 73% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,992 psi | 71% | 3002 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,460 psi | 50% | 2743 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,090 psi | 65% | 2969 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 54,839 psi | 84% | 3018 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,104 psi | 63% | 2805 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 39,088 psi | 60% | 2805 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,256 psi | 77% | 2963 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,095 psi | 76% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,471 psi | 73% | 2923 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,331 psi | 84% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,080 psi | 74% | 2877 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,754 psi | 60% | 2799 fps | 96.6% |
| Somchem S355 | <<locked>> | 80% | 54,418 psi | 84% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 41,858 psi | 64% | 2789 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 43,947 psi | 68% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,668 psi | 61% | 2785 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 80% | 52,156 psi | 80% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,269 psi | 74% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,534 psi | 53% | 2654 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 47,442 psi | 73% | 2940 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,566 psi | 59% | 2802 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 40,234 psi | 62% | 2884 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 88% | 40,582 psi | 62% | 2877 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 94% | 43,366 psi | 67% | 2986 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,384 psi | 73% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,414 psi | 76% | 3012 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,560 psi | 47% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,347 psi | 56% | 2703 fps | 95.7% |
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 79 powders for 6.5 Weatherby RPM loaded with the .264 | 125gr | Hasler ARIETE. Hodgdon Retumbo delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,314 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 125.0 gr projectile in 0.264" calls for a 1:8.0 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for 6.5 Weatherby RPM with the .264 | 125gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-33, 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.