Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 123gr | MRR Green Hunting bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Hodgdon Retumbo 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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 58,436 psi | 90% | 3136 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,680 psi | 86% | 3114 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,028 psi | 86% | 3238 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 57,058 psi | 88% | 3245 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 56,434 psi | 87% | 3176 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 58,131 psi | 89% | 3245 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,286 psi | 80% | 3136 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,818 psi | 72% | 3094 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,579 psi | 87% | 3173 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,579 psi | 87% | 3173 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,507 psi | 87% | 3173 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,783 psi | 89% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,898 psi | 86% | 3163 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,291 psi | 90% | 3238 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,927 psi | 86% | 3146 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,376 psi | 85% | 3212 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,434 psi | 87% | 3241 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,724 psi | 86% | 3133 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 57,377 psi | 88% | 3222 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,230 psi | 85% | 3215 fps | 99.4% |
| Bofors RP5 | <<locked>> | 94% | 58,291 psi | 90% | 3238 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,508 psi | 88% | 3110 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,682 psi | 89% | 3228 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 57,174 psi | 88% | 3173 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,927 psi | 86% | 3123 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,798 psi | 89% | 3173 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,710 psi | 87% | 3156 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,652 psi | 87% | 3084 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,001 psi | 89% | 3353 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,928 psi | 89% | 3209 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 57% | 1988 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,695 psi | 86% | 3097 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,347 psi | 85% | 3077 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,999 psi | 86% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,711 psi | 90% | 3156 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 56,101 psi | 86% | 3222 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,264 psi | 65% | 2986 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 56,144 psi | 86% | 3077 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,943 psi | 89% | 3130 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,927 psi | 86% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,855 psi | 87% | 3156 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 42,627 psi | 66% | 3018 fps | 98.9% |
| Norma MRP | <<locked>> | 92% | 58,421 psi | 90% | 3261 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,551 psi | 89% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,101 psi | 88% | 3245 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 56,521 psi | 87% | 3156 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,492 psi | 85% | 3169 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,029 psi | 59% | 2031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,535 psi | 85% | 3133 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,914 psi | 89% | 3222 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,969 psi | 85% | 3281 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,128 psi | 83% | 3232 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 90% | 57,319 psi | 88% | 3140 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 55,405 psi | 85% | 3150 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 57,508 psi | 88% | 3110 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,144 psi | 86% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,943 psi | 89% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,407 psi | 90% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,303 psi | 85% | 3028 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,798 psi | 90% | 3205 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 58,407 psi | 90% | 3097 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 55,288 psi | 85% | 3071 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 58,378 psi | 90% | 3150 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,014 psi | 86% | 3120 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,275 psi | 87% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,724 psi | 86% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,666 psi | 86% | 3100 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 58,392 psi | 90% | 3143 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,160 psi | 89% | 3176 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,030 psi | 89% | 3261 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 98% | 58,088 psi | 89% | 3235 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,926 psi | 85% | 3232 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,100 psi | 85% | 3035 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,174 psi | 88% | 3173 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,537 psi | 90% | 3294 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,014 psi | 86% | 3117 fps | 99.6% |
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% | 36,390 psi | 56% | 2726 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 48,515 psi | 75% | 2995 fps | 100% |
| Accurate High Country | 57.9 gr | 80% | 39,450 psi | 61% | 2900 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 84% | 42,917 psi | 66% | 2969 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 40,306 psi | 62% | 2861 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 41,292 psi | 64% | 2913 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 39,900 psi | 61% | 2874 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 31,633 psi | 49% | 2703 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,756 psi | 63% | 2861 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,756 psi | 63% | 2861 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,209 psi | 71% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,737 psi | 83% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,379 psi | 62% | 2854 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,260 psi | 56% | 2792 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,925 psi | 54% | 2753 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,313 psi | 47% | 2657 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,508 psi | 59% | 2907 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,255 psi | 76% | 3009 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 36,143 psi | 56% | 2789 fps | 95.4% |
| Bofors RP30 | <<locked>> | 90% | 39,030 psi | 60% | 2890 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 36,260 psi | 56% | 2792 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 50,792 psi | 78% | 2999 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 38,058 psi | 59% | 2835 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 49,922 psi | 77% | 3048 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,417 psi | 81% | 3064 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 41,205 psi | 63% | 2858 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,250 psi | 67% | 2904 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,758 psi | 67% | 2874 fps | 100% |
| Hodgdon Retumbo | 58.6 gr | 84% | 33,823 psi | 52% | 2808 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,922 psi | 77% | 3074 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 43% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,122 psi | 71% | 2923 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,938 psi | 80% | 3018 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,919 psi | 71% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,089 psi | 62% | 2795 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 39,726 psi | 61% | 2890 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,653 psi | 61% | 2923 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 49,632 psi | 76% | 2969 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,022 psi | 74% | 2959 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 31,343 psi | 48% | 2592 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 46,340 psi | 71% | 2966 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 32,401 psi | 50% | 2753 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,029 psi | 59% | 2867 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 47,355 psi | 73% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,523 psi | 61% | 2897 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 46,224 psi | 71% | 2976 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 32,793 psi | 50% | 2697 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 44% | 1821 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,385 psi | 74% | 3015 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,659 psi | 72% | 3035 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,996 psi | 51% | 2779 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,946 psi | 66% | 3012 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 41,582 psi | 64% | 2838 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 39,813 psi | 61% | 2844 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 50,792 psi | 78% | 2999 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,632 psi | 76% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,022 psi | 74% | 2959 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,955 psi | 85% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,544 psi | 75% | 2910 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,479 psi | 61% | 2835 fps | 96.8% |
| Somchem S355 | <<locked>> | 80% | 55,027 psi | 85% | 3048 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,351 psi | 65% | 2825 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 44,585 psi | 69% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,321 psi | 62% | 2822 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 52,736 psi | 81% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,791 psi | 75% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,969 psi | 54% | 2687 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 48,167 psi | 74% | 2976 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,146 psi | 60% | 2835 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,799 psi | 63% | 2917 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 41,292 psi | 64% | 2913 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 44,338 psi | 68% | 3028 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,950 psi | 74% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,140 psi | 77% | 3051 fps | 99.7% |
| Winchester StaBALL HD | 57.3 gr | 80% | 31,169 psi | 48% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,941 psi | 57% | 2743 fps | 95.8% |
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 76 powders for 6.5 Weatherby RPM loaded with the .264 | 123gr | MRR Green Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,353 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,353 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 123.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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 High Country, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for 6.5 Weatherby RPM with the .264 | 123gr | MRR Green Hunting 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.