Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Remington PSP Core-Lokt bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-33.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 57,972 psi | 89% | 2936 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,346 psi | 84% | 2986 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 82% | 57,232 psi | 88% | 3048 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,624 psi | 90% | 3022 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,812 psi | 89% | 3045 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,595 psi | 89% | 3035 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,436 psi | 90% | 3169 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 94% | 57,537 psi | 89% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,262 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,334 psi | 90% | 3038 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,826 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,682 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,333 psi | 87% | 3068 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,608 psi | 87% | 3064 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,653 psi | 89% | 3005 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,769 psi | 89% | 3028 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,537 psi | 89% | 3045 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,334 psi | 90% | 3038 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 55,013 psi | 85% | 2992 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,115 psi | 86% | 2969 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,259 psi | 85% | 2956 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,595 psi | 89% | 3114 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,189 psi | 59% | 1942 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,086 psi | 86% | 2946 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,420 psi | 87% | 3028 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,523 psi | 90% | 2963 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,449 psi | 87% | 3041 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,434 psi | 87% | 2917 fps | 100% |
| Norma 217 | <<locked>> | 96% | 58,044 psi | 89% | 3061 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,537 psi | 90% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 58,131 psi | 89% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,521 psi | 87% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,160 psi | 60% | 1985 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,450 psi | 90% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,377 psi | 88% | 3071 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 58,740 psi | 90% | 2992 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 58,305 psi | 90% | 3005 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,869 psi | 86% | 2989 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,928 psi | 89% | 3005 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,479 psi | 90% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,610 psi | 90% | 2963 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,233 psi | 90% | 3002 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 82% | 58,247 psi | 90% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,725 psi | 89% | 3054 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,593 psi | 86% | 2999 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,769 psi | 89% | 3074 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 55,463 psi | 85% | 3077 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,436 psi | 90% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,189 psi | 90% | 2969 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 50,807 psi | 78% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,789 psi | 72% | 2844 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 53,417 psi | 82% | 2982 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 54,882 psi | 84% | 2963 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,227 psi | 77% | 2913 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,855 psi | 58% | 2657 fps | 97.4% |
| ADI AR 2218 | 80 gr | 88% | 43,279 psi | 67% | 2861 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 35,172 psi | 54% | 2628 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,621 psi | 84% | 2953 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,952 psi | 78% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,748 psi | 77% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,903 psi | 68% | 2789 fps | 100% |
| Alliant Reloder-33 | 79.6 gr | 86% | 45,020 psi | 69% | 2854 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,455 psi | 70% | 2851 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,427 psi | 73% | 2818 fps | 97.1% |
| Bofors RP15 | <<locked>> | 80% | 47,630 psi | 73% | 2851 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 41,060 psi | 63% | 2733 fps | 98.2% |
| Bofors RP5 | <<locked>> | 80% | 50,952 psi | 78% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 41,249 psi | 63% | 2736 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 80% | 52,518 psi | 81% | 2910 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,503 psi | 79% | 2890 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,265 psi | 67% | 2858 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 44% | 1736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,649 psi | 81% | 2887 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 49,168 psi | 76% | 2900 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,853 psi | 84% | 2900 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 82% | 35,114 psi | 54% | 2605 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 43,932 psi | 68% | 2703 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,359 psi | 51% | 2569 fps | 97.5% |
| Norma MRP | <<locked>> | 80% | 54,781 psi | 84% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,227 psi | 77% | 2927 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,324 psi | 70% | 2792 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,573 psi | 46% | 1778 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,018 psi | 66% | 2831 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,523 psi | 61% | 2720 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 55,042 psi | 85% | 2930 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,578 psi | 84% | 2946 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,556 psi | 70% | 2799 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,244 psi | 83% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,665 psi | 84% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,225 psi | 74% | 2795 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,500 psi | 73% | 2808 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 54,766 psi | 84% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 54,070 psi | 83% | 2992 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,498 psi | 70% | 2808 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 40,408 psi | 62% | 2736 fps | 96% |
| Vihtavuori N570 | 74.8 gr | 84% | 44,614 psi | 69% | 2858 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,270 psi | 77% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,937 psi | 78% | 2854 fps | 99.9% |
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 49 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 140gr | Remington PSP Core-Lokt. ADI AR 2218 delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,169 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 140gr | Remington PSP Core-Lokt 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.