Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 140gr | Speer Grand Slam bullet and 69 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 ReloadSwiss RS 80.
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% | 58,204 psi | 90% | 2963 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,726 psi | 90% | 2979 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,101 psi | 86% | 3071 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 88% | 57,014 psi | 88% | 3077 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 86% | 55,738 psi | 86% | 2995 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,899 psi | 89% | 3071 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 56,144 psi | 86% | 3041 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,417 psi | 81% | 3087 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,418 psi | 84% | 3061 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,883 psi | 86% | 2992 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,883 psi | 86% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,072 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,274 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,262 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,202 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,985 psi | 86% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,724 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,943 psi | 89% | 3143 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 49,023 psi | 75% | 2982 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,247 psi | 90% | 3028 fps | 98.6% |
| Bofors RP15 | <<locked>> | 92% | 57,421 psi | 88% | 3051 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,825 psi | 86% | 3054 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 58,262 psi | 90% | 3064 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,769 psi | 89% | 3068 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,942 psi | 88% | 2999 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,883 psi | 86% | 2982 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,231 psi | 87% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,158 psi | 85% | 3130 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 58% | 1883 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,189 psi | 90% | 2969 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,769 psi | 90% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,450 psi | 88% | 2976 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 55,956 psi | 86% | 3048 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,922 psi | 77% | 2979 fps | 99.5% |
| Lovex S065 | <<locked>> | 82% | 58,276 psi | 90% | 2940 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,913 psi | 88% | 2946 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,057 psi | 86% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,724 psi | 86% | 2972 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,879 psi | 78% | 3005 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,392 psi | 90% | 3081 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,840 psi | 87% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,305 psi | 88% | 3074 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 55,709 psi | 86% | 2972 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,579 psi | 86% | 2999 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,638 psi | 59% | 1929 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,464 psi | 88% | 3035 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,840 psi | 86% | 3120 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,100 psi | 85% | 3081 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 86% | 56,478 psi | 87% | 2966 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 55,129 psi | 85% | 2976 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,276 psi | 90% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,913 psi | 88% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,232 psi | 88% | 2894 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,450 psi | 90% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,827 psi | 89% | 2956 fps | 99.6% |
| Somchem S365 | <<locked>> | 84% | 58,146 psi | 89% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,448 psi | 85% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,305 psi | 90% | 2946 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,332 psi | 85% | 2933 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,986 psi | 89% | 3012 fps | 97% |
| Vihtavuori N550 | <<locked>> | 82% | 57,566 psi | 89% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,073 psi | 89% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,841 psi | 89% | 3087 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 94% | 58,378 psi | 90% | 3074 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 55,941 psi | 86% | 3084 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 98% | 57,029 psi | 88% | 3150 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,667 psi | 89% | 2894 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,506 psi | 85% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,216 psi | 85% | 2943 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% | 41,684 psi | 64% | 2690 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 54,955 psi | 85% | 2927 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 45,440 psi | 70% | 2874 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 80% | 42,873 psi | 66% | 2812 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 80% | 45,701 psi | 70% | 2822 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 40,915 psi | 63% | 2756 fps | 97.4% |
| ADI AR 2217 | <<locked>> | 84% | 34,954 psi | 54% | 2615 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 96% | 45,382 psi | 70% | 2940 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 27,934 psi | 43% | 2457 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,050 psi | 71% | 2818 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,050 psi | 71% | 2818 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,489 psi | 81% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,614 psi | 70% | 2812 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,582 psi | 64% | 2766 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,263 psi | 62% | 2707 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,896 psi | 54% | 2644 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,339 psi | 70% | 2874 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,282 psi | 71% | 2933 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 98% | 45,542 psi | 70% | 2913 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,194 psi | 70% | 2789 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 38,812 psi | 60% | 2703 fps | 97.9% |
| Bofors RP30 | <<locked>> | 82% | 34,722 psi | 53% | 2631 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,582 psi | 64% | 2766 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 80% | 33,069 psi | 51% | 2566 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 80% | 43,598 psi | 67% | 2759 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,757 psi | 66% | 2743 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,313 psi | 76% | 2799 fps | 100% |
| Hodgdon Retumbo | 57.1 gr | 80% | 34,055 psi | 52% | 2677 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 43% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,358 psi | 79% | 2861 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,735 psi | 80% | 2864 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,744 psi | 69% | 2753 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,595 psi | 61% | 2736 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 88% | 33,272 psi | 51% | 2615 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 54,781 psi | 84% | 2887 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,476 psi | 82% | 2890 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,926 psi | 55% | 2566 fps | 99.1% |
| Norma 204 | <<locked>> | 80% | 51,996 psi | 80% | 2913 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 29,196 psi | 45% | 2516 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 43,947 psi | 68% | 2838 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 53,287 psi | 82% | 2907 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,436 psi | 61% | 2749 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 52,040 psi | 80% | 2913 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,447 psi | 55% | 2625 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1726 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,519 psi | 82% | 2976 fps | 100% |
| ReloadSwiss RS 76 | 61.1 gr | 80% | 33,185 psi | 51% | 2651 fps | 98.1% |
| ReloadSwiss RS 80 | 66.2 gr | 86% | 37,695 psi | 58% | 2736 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 46,601 psi | 72% | 2792 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,049 psi | 69% | 2799 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,781 psi | 84% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,476 psi | 82% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,708 psi | 83% | 2841 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,701 psi | 69% | 2795 fps | 99.2% |
| Somchem S361 | <<locked>> | 80% | 47,471 psi | 73% | 2782 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 50,966 psi | 78% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,585 psi | 70% | 2779 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 54,679 psi | 84% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,827 psi | 61% | 2654 fps | 98.7% |
| Vihtavuori N170 | <<locked>> | 92% | 50,560 psi | 78% | 2884 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 53,882 psi | 83% | 2900 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,962 psi | 69% | 2785 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,729 psi | 67% | 2828 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 80% | 36,303 psi | 56% | 2644 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 86% | 39,030 psi | 60% | 2756 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 92% | 45,818 psi | 70% | 2940 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,911 psi | 83% | 2844 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,985 psi | 58% | 2762 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,989 psi | 65% | 2707 fps | 98.7% |
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 69 powders for 6.5 Weatherby RPM loaded with the .264 | 140gr | Speer Grand Slam. Vihtavuori N570 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,150 fps. ADI AR 2218 gives the best case fill at 100 %, and 69 of the 69 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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, ReloadSwiss RS 80 rank at the top here: for 6.5 Weatherby RPM with the .264 | 140gr | Speer Grand Slam 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.