Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 126gr | Lehigh Defense Controlled Chaos bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 58,204 psi | 90% | 3100 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,463 psi | 85% | 3074 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,971 psi | 88% | 3209 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 56,391 psi | 87% | 3140 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 57,972 psi | 89% | 3209 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,272 psi | 80% | 3104 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,804 psi | 72% | 3064 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,550 psi | 87% | 3133 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,624 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,883 psi | 86% | 3127 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,088 psi | 89% | 3202 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,666 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,274 psi | 85% | 3173 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,304 psi | 87% | 3202 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,724 psi | 86% | 3097 fps | 96.8% |
| Bofors RP15 | <<locked>> | 96% | 57,232 psi | 88% | 3186 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,940 psi | 85% | 3176 fps | 99.4% |
| Bofors RP5 | <<locked>> | 94% | 58,088 psi | 89% | 3202 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 57,551 psi | 89% | 3077 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,740 psi | 89% | 3196 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 57,043 psi | 88% | 3133 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,927 psi | 86% | 3087 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,899 psi | 89% | 3140 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,768 psi | 87% | 3123 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,724 psi | 87% | 3048 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,015 psi | 89% | 3320 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,711 psi | 89% | 3173 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 57% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,782 psi | 86% | 3064 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,726 psi | 90% | 3097 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,840 psi | 86% | 3064 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,407 psi | 90% | 3117 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 55,927 psi | 86% | 3182 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,192 psi | 65% | 2953 fps | 97% |
| Lovex S065 | <<locked>> | 84% | 56,159 psi | 86% | 3041 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,798 psi | 89% | 3091 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,709 psi | 86% | 3061 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,782 psi | 87% | 3120 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 42,554 psi | 65% | 2989 fps | 99% |
| Norma MRP | <<locked>> | 92% | 58,262 psi | 90% | 3225 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,377 psi | 88% | 3110 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,000 psi | 88% | 3209 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 56,449 psi | 87% | 3120 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,245 psi | 85% | 3133 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 59% | 2001 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,709 psi | 86% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,928 psi | 89% | 3189 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,824 psi | 84% | 3248 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,056 psi | 83% | 3196 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 90% | 57,246 psi | 88% | 3104 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 55,347 psi | 85% | 3114 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 57,551 psi | 89% | 3077 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,159 psi | 86% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,798 psi | 89% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,262 psi | 90% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,143 psi | 85% | 2989 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,784 psi | 90% | 3169 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 58,392 psi | 90% | 3061 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 55,405 psi | 85% | 3038 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 58,291 psi | 90% | 3114 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,014 psi | 86% | 3084 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,246 psi | 87% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,535 psi | 85% | 3048 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,492 psi | 85% | 3064 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 58,566 psi | 90% | 3110 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,812 psi | 89% | 3133 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,928 psi | 89% | 3222 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 98% | 58,044 psi | 89% | 3202 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,013 psi | 85% | 3202 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,100 psi | 85% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,290 psi | 88% | 3136 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,160 psi | 89% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,811 psi | 86% | 3077 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% | 36,332 psi | 56% | 2694 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 48,443 psi | 75% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 42,873 psi | 66% | 2936 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 40,277 psi | 62% | 2828 fps | 97% |
| ADI AR 2213 | <<locked>> | 82% | 38,595 psi | 59% | 2818 fps | 95% |
| ADI AR 2217 | <<locked>> | 92% | 39,885 psi | 61% | 2844 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 88% | 31,575 psi | 49% | 2677 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,369 psi | 71% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,780 psi | 83% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,321 psi | 62% | 2822 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,230 psi | 56% | 2762 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,867 psi | 54% | 2723 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,284 psi | 47% | 2628 fps | 97% |
| Alliant Reloder-26 | 58.6 gr | 80% | 38,551 psi | 59% | 2877 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,153 psi | 76% | 2976 fps | 95.2% |
| Bofors RP15 | <<locked>> | 82% | 36,129 psi | 56% | 2759 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 36,347 psi | 56% | 2795 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 36,230 psi | 56% | 2762 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 50,691 psi | 78% | 2963 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 38,014 psi | 58% | 2802 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 49,937 psi | 77% | 3012 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 52,402 psi | 81% | 3028 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 41,046 psi | 63% | 2822 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,437 psi | 62% | 2808 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,642 psi | 67% | 2838 fps | 100% |
| Hodgdon Retumbo | 57.5 gr | 84% | 33,707 psi | 52% | 2776 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 49,850 psi | 77% | 3041 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 43% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,050 psi | 71% | 2890 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,851 psi | 80% | 2982 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,861 psi | 71% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,016 psi | 62% | 2762 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 84% | 39,755 psi | 61% | 2861 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,028 psi | 57% | 2831 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 49,545 psi | 76% | 2933 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,935 psi | 74% | 2923 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 31,227 psi | 48% | 2562 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 46,354 psi | 71% | 2936 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 32,401 psi | 50% | 2726 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 38,072 psi | 59% | 2838 fps | 97.9% |
| Norma URP | <<locked>> | 80% | 47,297 psi | 73% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,450 psi | 61% | 2864 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 46,267 psi | 71% | 2943 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 32,851 psi | 51% | 2671 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 44% | 1791 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,428 psi | 75% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,717 psi | 72% | 3002 fps | 100% |
| ReloadSwiss RS 76 | 60.1 gr | 82% | 30,661 psi | 47% | 2677 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,960 psi | 66% | 2982 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 41,510 psi | 64% | 2805 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 39,726 psi | 61% | 2808 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 80% | 50,691 psi | 78% | 2963 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,545 psi | 76% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,935 psi | 74% | 2923 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,781 psi | 84% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,501 psi | 75% | 2877 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,421 psi | 61% | 2805 fps | 96.9% |
| Somchem S355 | <<locked>> | 80% | 54,897 psi | 84% | 3009 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,453 psi | 65% | 2795 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 44,498 psi | 68% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,306 psi | 62% | 2792 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 52,678 psi | 81% | 2927 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,733 psi | 75% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,954 psi | 54% | 2657 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 48,167 psi | 74% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,073 psi | 60% | 2802 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,872 psi | 63% | 2890 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 88% | 41,278 psi | 64% | 2884 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 94% | 44,309 psi | 68% | 2995 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,834 psi | 74% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,169 psi | 77% | 3018 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,183 psi | 48% | 2753 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,724 psi | 56% | 2707 fps | 95.9% |
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 | 126gr | Lehigh Defense Controlled Chaos. Hodgdon Retumbo delivers the highest muzzle velocity at 3,320 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,320 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 126.0 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. Alliant Reloder-26, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5 Weatherby RPM with the .264 | 126gr | Lehigh Defense Controlled Chaos they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, 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.