Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 140gr | Sierra GameKing bullet and 70 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 Accurate MAGPRO.
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>> | 90% | 56,855 psi | 87% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,406 psi | 88% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,391 psi | 87% | 3058 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 58,407 psi | 90% | 3035 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,550 psi | 87% | 3048 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,668 psi | 90% | 3077 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,068 psi | 79% | 3058 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,997 psi | 82% | 3038 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 58,465 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,581 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,798 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,927 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,552 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,479 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,274 psi | 85% | 3038 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,028 psi | 86% | 3114 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,276 psi | 88% | 3009 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 56,101 psi | 86% | 3028 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 58,320 psi | 90% | 3091 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 56,927 psi | 88% | 3045 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,668 psi | 90% | 2959 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,289 psi | 87% | 3041 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,769 psi | 90% | 3018 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,941 psi | 86% | 2982 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,653 psi | 90% | 3022 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,769 psi | 90% | 2933 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,348 psi | 88% | 3163 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 58% | 1873 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,130 psi | 88% | 2949 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,595 psi | 89% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,492 psi | 87% | 2959 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 58,769 psi | 90% | 3091 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,486 psi | 75% | 2953 fps | 99.3% |
| Lovex S065 | <<locked>> | 82% | 57,392 psi | 88% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,767 psi | 86% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,218 psi | 90% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,363 psi | 90% | 3012 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 49,327 psi | 76% | 2979 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,014 psi | 88% | 3061 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,637 psi | 86% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,854 psi | 86% | 3054 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 58,204 psi | 90% | 3005 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,305 psi | 90% | 3041 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,537 psi | 59% | 1919 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,769 psi | 89% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,985 psi | 86% | 3012 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,276 psi | 90% | 3156 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,580 psi | 89% | 3120 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 86% | 55,434 psi | 85% | 2946 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 57,450 psi | 88% | 3012 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,668 psi | 90% | 2959 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,392 psi | 88% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,767 psi | 86% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,420 psi | 87% | 2877 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,072 psi | 88% | 3009 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,724 psi | 87% | 2936 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 56,898 psi | 88% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,015 psi | 89% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,101 psi | 88% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,769 psi | 89% | 2966 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,724 psi | 87% | 2986 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 82% | 56,507 psi | 87% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,840 psi | 87% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,521 psi | 87% | 3064 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 56,855 psi | 87% | 3048 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 58,334 psi | 90% | 3123 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 98% | 55,216 psi | 85% | 3117 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,652 psi | 87% | 2881 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,247 psi | 90% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,740 psi | 89% | 2979 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% | 40,625 psi | 63% | 2667 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 53,635 psi | 83% | 2904 fps | 100% |
| Accurate MAGPRO | 59.1 gr | 80% | 39,653 psi | 61% | 2733 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 44,599 psi | 69% | 2799 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 39,914 psi | 61% | 2733 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 34,127 psi | 53% | 2592 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 47,485 psi | 73% | 2982 fps | 96% |
| ADI AR 2225 | <<locked>> | 82% | 29,051 psi | 45% | 2493 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,976 psi | 69% | 2795 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,430 psi | 79% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,556 psi | 69% | 2789 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,538 psi | 62% | 2740 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,334 psi | 61% | 2687 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,939 psi | 52% | 2618 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,150 psi | 68% | 2854 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 44,788 psi | 69% | 2904 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,498 psi | 68% | 2769 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 37,782 psi | 58% | 2677 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 33,736 psi | 52% | 2605 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 40,538 psi | 62% | 2740 fps | 98.4% |
| Bofors RP7 | <<locked>> | 80% | 55,027 psi | 85% | 2904 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 32,387 psi | 50% | 2546 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 55,100 psi | 85% | 2963 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,569 psi | 65% | 2736 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,771 psi | 64% | 2720 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,312 psi | 74% | 2782 fps | 100% |
| Hodgdon Retumbo | 55.9 gr | 80% | 33,156 psi | 51% | 2651 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 43% | 1677 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,285 psi | 77% | 2838 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 50,792 psi | 78% | 2848 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,787 psi | 67% | 2730 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 80% | 38,769 psi | 60% | 2717 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,548 psi | 53% | 2651 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 53,882 psi | 83% | 2871 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,330 psi | 81% | 2871 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,085 psi | 54% | 2543 fps | 98.9% |
| Norma 204 | <<locked>> | 80% | 50,923 psi | 78% | 2894 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 28,355 psi | 44% | 2493 fps | 95% |
| Norma MRP | <<locked>> | 80% | 43,047 psi | 66% | 2815 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 52,083 psi | 80% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,595 psi | 59% | 2726 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,952 psi | 78% | 2894 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,505 psi | 53% | 2602 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,906 psi | 44% | 1716 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,853 psi | 83% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,330 psi | 81% | 2956 fps | 100% |
| ReloadSwiss RS 76 | 59.9 gr | 80% | 32,343 psi | 50% | 2625 fps | 97.7% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,465 psi | 61% | 2782 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 45,585 psi | 70% | 2769 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 44,179 psi | 68% | 2782 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 80% | 55,027 psi | 85% | 2904 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,882 psi | 83% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,330 psi | 81% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,910 psi | 81% | 2825 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,830 psi | 67% | 2776 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 46,601 psi | 72% | 2762 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 49,661 psi | 76% | 2838 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,556 psi | 69% | 2756 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 53,490 psi | 82% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,841 psi | 60% | 2631 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 49,603 psi | 76% | 2864 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 52,794 psi | 81% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,787 psi | 67% | 2762 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,859 psi | 66% | 2808 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 35,346 psi | 54% | 2621 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 88% | 40,814 psi | 63% | 2795 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 94% | 47,848 psi | 74% | 2982 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,924 psi | 81% | 2828 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,709 psi | 56% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,002 psi | 63% | 2687 fps | 98.4% |
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 70 powders for 6.5 Weatherby RPM loaded with the .264 | 140gr | Sierra GameKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,163 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 140.0 gr projectile in 0.264" calls for a 1:10.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, Accurate MAGPRO rank at the top here: for 6.5 Weatherby RPM with the .264 | 140gr | Sierra GameKing 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.