Load Specifications
Load data in caliber 6.5 Weatherby RPM with .264 | 150gr | Sierra MatchKing bullet and 67 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% | 57,479 psi | 88% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,334 psi | 90% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,347 psi | 87% | 2966 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 55,419 psi | 85% | 2890 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,261 psi | 88% | 2963 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 55,550 psi | 85% | 2933 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,677 psi | 80% | 2982 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,809 psi | 83% | 2956 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,782 psi | 86% | 2874 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,494 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,624 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,521 psi | 85% | 2858 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,579 psi | 86% | 2933 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,188 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,927 psi | 88% | 3031 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 48,312 psi | 74% | 2884 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,740 psi | 89% | 2920 fps | 98.8% |
| Bofors RP15 | <<locked>> | 92% | 56,797 psi | 87% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,376 psi | 85% | 2949 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 57,624 psi | 89% | 2953 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,145 psi | 88% | 2956 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,492 psi | 87% | 2894 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,361 psi | 85% | 2877 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,811 psi | 86% | 2792 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,334 psi | 90% | 3074 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,739 psi | 58% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,725 psi | 89% | 2858 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,537 psi | 90% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,130 psi | 88% | 2871 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 55,550 psi | 85% | 2943 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,385 psi | 76% | 2877 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 58,015 psi | 89% | 2831 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,507 psi | 87% | 2835 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,521 psi | 85% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,376 psi | 85% | 2867 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,125 psi | 77% | 2900 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,812 psi | 89% | 2972 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,376 psi | 87% | 2851 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,536 psi | 87% | 2963 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 55,347 psi | 85% | 2864 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,955 psi | 85% | 2894 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,609 psi | 59% | 1844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,349 psi | 90% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,014 psi | 88% | 2927 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,969 psi | 85% | 3009 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,682 psi | 90% | 3041 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 56,159 psi | 86% | 2858 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 88% | 58,436 psi | 90% | 2923 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,015 psi | 89% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,507 psi | 87% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,913 psi | 88% | 2785 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,030 psi | 89% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,334 psi | 88% | 2851 fps | 99.7% |
| Somchem S365 | <<locked>> | 84% | 57,624 psi | 89% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,508 psi | 90% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,943 psi | 89% | 2841 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,494 psi | 90% | 2877 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,479 psi | 88% | 2907 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 82% | 57,145 psi | 88% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,769 psi | 89% | 2887 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,319 psi | 88% | 2979 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 94% | 57,682 psi | 89% | 2966 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 55,071 psi | 85% | 2976 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 56,260 psi | 87% | 3041 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,348 psi | 88% | 2792 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,969 psi | 85% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,465 psi | 90% | 2890 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% | 41,234 psi | 63% | 2592 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 54,360 psi | 84% | 2815 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,583 psi | 66% | 2717 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 80% | 45,426 psi | 70% | 2720 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 40,538 psi | 62% | 2661 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 32,401 psi | 50% | 2464 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 96% | 44,889 psi | 69% | 2841 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 27,644 psi | 43% | 2375 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,257 psi | 80% | 2822 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,150 psi | 69% | 2710 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,205 psi | 63% | 2667 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,118 psi | 62% | 2612 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,650 psi | 53% | 2552 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,049 psi | 69% | 2776 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 42,279 psi | 65% | 2766 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 44,730 psi | 69% | 2815 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 42,308 psi | 65% | 2638 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 38,508 psi | 59% | 2608 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 32,024 psi | 49% | 2480 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 41,205 psi | 63% | 2667 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 32,909 psi | 51% | 2480 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 80% | 43,250 psi | 67% | 2664 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,380 psi | 65% | 2644 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,066 psi | 75% | 2697 fps | 100% |
| Hodgdon Retumbo | 53.8 gr | 80% | 33,721 psi | 52% | 2589 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 43% | 1608 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,097 psi | 79% | 2756 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,416 psi | 79% | 2759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,498 psi | 68% | 2654 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,378 psi | 61% | 2648 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 88% | 32,880 psi | 51% | 2526 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 54,607 psi | 84% | 2782 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,127 psi | 82% | 2785 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,607 psi | 55% | 2474 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 51,735 psi | 80% | 2808 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 27,122 psi | 42% | 2379 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 43,714 psi | 67% | 2740 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 52,939 psi | 81% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,189 psi | 60% | 2654 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 80% | 51,750 psi | 80% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,114 psi | 54% | 2536 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1650 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,549 psi | 84% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,895 psi | 81% | 2867 fps | 100% |
| ReloadSwiss RS 76 | 57.6 gr | 80% | 32,793 psi | 50% | 2562 fps | 98.5% |
| ReloadSwiss RS 80 | 62.4 gr | 86% | 37,144 psi | 57% | 2644 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 46,296 psi | 71% | 2694 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 44,759 psi | 69% | 2700 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,607 psi | 84% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,127 psi | 82% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,490 psi | 82% | 2740 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,411 psi | 68% | 2697 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 47,007 psi | 72% | 2680 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 50,633 psi | 78% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,208 psi | 70% | 2677 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 54,157 psi | 83% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,421 psi | 61% | 2556 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 92% | 50,212 psi | 77% | 2789 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 53,519 psi | 82% | 2795 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,570 psi | 69% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,511 psi | 67% | 2736 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 36,013 psi | 55% | 2556 fps | 96.2% |
| Vihtavuori N568 | <<locked>> | 86% | 38,667 psi | 59% | 2664 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 92% | 45,397 psi | 70% | 2844 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,461 psi | 82% | 2740 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,637 psi | 58% | 2667 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,669 psi | 64% | 2612 fps | 98.9% |
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 67 powders for 6.5 Weatherby RPM loaded with the .264 | 150gr | Sierra MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,074 fps. ADI AR 2218 gives the best case fill at 100 %, and 67 of the 67 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 150.0 gr projectile in 0.264" calls for a 1:8.0 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 | 150gr | Sierra MatchKing 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.