Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 140gr | Lapua Naturalis bullet and 66 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% | 57,957 psi | 89% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,769 psi | 90% | 2966 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,579 psi | 87% | 3054 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 86% | 55,216 psi | 85% | 2976 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 57,014 psi | 88% | 3045 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 55,419 psi | 85% | 3018 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,706 psi | 80% | 3054 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,679 psi | 83% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,492 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,494 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,595 psi | 89% | 3041 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,695 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,332 psi | 85% | 3018 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,173 psi | 86% | 3041 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,000 psi | 88% | 3117 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,522 psi | 88% | 3002 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 56,768 psi | 87% | 3028 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,230 psi | 85% | 3035 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 57,595 psi | 89% | 3041 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,000 psi | 88% | 3041 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,463 psi | 87% | 2979 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,361 psi | 85% | 2959 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,941 psi | 86% | 2884 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,073 psi | 89% | 3166 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 58% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,696 psi | 89% | 2946 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,697 psi | 90% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,116 psi | 88% | 2956 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 55,347 psi | 85% | 3028 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,559 psi | 76% | 2963 fps | 99.4% |
| Lovex S065 | <<locked>> | 82% | 58,320 psi | 90% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,826 psi | 87% | 2927 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,101 psi | 86% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,274 psi | 85% | 2953 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 50,227 psi | 77% | 2989 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,740 psi | 89% | 3061 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,579 psi | 87% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,478 psi | 87% | 3051 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 55,317 psi | 85% | 2953 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,926 psi | 85% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 59% | 1909 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,682 psi | 90% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,724 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,969 psi | 85% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,581 psi | 90% | 3127 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 86% | 56,072 psi | 86% | 2943 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 58,276 psi | 90% | 3012 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,320 psi | 90% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,826 psi | 87% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,159 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,856 psi | 89% | 3009 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,377 psi | 88% | 2933 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 57,725 psi | 89% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,769 psi | 90% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,015 psi | 89% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,436 psi | 90% | 2963 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,566 psi | 89% | 2986 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 82% | 57,276 psi | 88% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,957 psi | 89% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,188 psi | 88% | 3061 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 57,957 psi | 89% | 3054 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 54,955 psi | 85% | 3058 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 98% | 55,999 psi | 86% | 3120 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,130 psi | 88% | 2877 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,795 psi | 84% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,421 psi | 90% | 2976 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% | 42,105 psi | 65% | 2684 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 54,926 psi | 85% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,076 psi | 66% | 2805 fps | 96.8% |
| ADI AR 2209 | <<locked>> | 80% | 45,440 psi | 70% | 2802 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 40,857 psi | 63% | 2743 fps | 97.2% |
| ADI AR 2217 | <<locked>> | 84% | 35,056 psi | 54% | 2602 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 48,298 psi | 74% | 2986 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 28,413 psi | 44% | 2457 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,127 psi | 80% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,455 psi | 70% | 2795 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,611 psi | 64% | 2756 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,408 psi | 62% | 2697 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,041 psi | 54% | 2635 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,281 psi | 70% | 2864 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 45,788 psi | 70% | 2913 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,194 psi | 70% | 2772 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 38,841 psi | 60% | 2690 fps | 97.8% |
| Bofors RP30 | <<locked>> | 82% | 34,983 psi | 54% | 2628 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,611 psi | 64% | 2756 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 80% | 33,489 psi | 52% | 2562 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 80% | 43,511 psi | 67% | 2743 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,685 psi | 66% | 2726 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,197 psi | 76% | 2782 fps | 100% |
| Hodgdon Retumbo | 54.9 gr | 80% | 34,258 psi | 53% | 2671 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,053 psi | 79% | 2841 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,851 psi | 80% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,599 psi | 69% | 2733 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 39,726 psi | 61% | 2726 fps | 97% |
| IMR 8133 Enduron | <<locked>> | 88% | 33,620 psi | 52% | 2615 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 54,766 psi | 84% | 2871 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,301 psi | 82% | 2874 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,506 psi | 56% | 2562 fps | 99.2% |
| Norma 204 | <<locked>> | 80% | 51,793 psi | 80% | 2894 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 29,762 psi | 46% | 2526 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 43,990 psi | 68% | 2828 fps | 99.7% |
| Norma URP | <<locked>> | 80% | 52,997 psi | 82% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,523 psi | 61% | 2736 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 51,895 psi | 80% | 2897 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,592 psi | 55% | 2615 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,211 psi | 45% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,781 psi | 84% | 2933 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,040 psi | 82% | 2959 fps | 100% |
| ReloadSwiss RS 76 | 58.8 gr | 80% | 33,504 psi | 52% | 2648 fps | 98.1% |
| ReloadSwiss RS 80 | 63.7 gr | 86% | 37,797 psi | 58% | 2730 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 46,369 psi | 71% | 2772 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 45,136 psi | 69% | 2785 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,766 psi | 84% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,301 psi | 82% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,621 psi | 82% | 2822 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,817 psi | 69% | 2782 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 47,442 psi | 73% | 2766 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 50,734 psi | 78% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,701 psi | 70% | 2762 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 54,375 psi | 84% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,900 psi | 61% | 2641 fps | 98.6% |
| Vihtavuori N170 | <<locked>> | 92% | 50,430 psi | 78% | 2864 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 53,809 psi | 83% | 2887 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,063 psi | 69% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,743 psi | 67% | 2818 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 80% | 36,709 psi | 56% | 2641 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 86% | 39,102 psi | 60% | 2749 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 92% | 45,397 psi | 70% | 2920 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,621 psi | 82% | 2828 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,000 psi | 58% | 2759 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,047 psi | 65% | 2694 fps | 98.6% |
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 66 powders for 6.5 Weatherby RPM loaded with the .264 | 140gr | Lapua Naturalis. Hodgdon Retumbo delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,166 fps. ADI AR 2218 gives the best case fill at 100 %, and 66 of the 66 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 1:9.0 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 | Lapua Naturalis 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.