Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 139gr | Norma PlastSpitz 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% | 57,406 psi | 88% | 2940 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,548 psi | 82% | 2979 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 82% | 56,637 psi | 87% | 3048 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 58,059 psi | 89% | 3025 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,203 psi | 88% | 3045 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,753 psi | 87% | 3031 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,566 psi | 89% | 3166 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 56,666 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,711 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,783 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,985 psi | 86% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,043 psi | 88% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,521 psi | 85% | 3064 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,796 psi | 86% | 3061 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,956 psi | 88% | 3002 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 57,174 psi | 88% | 3028 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,927 psi | 88% | 3045 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,783 psi | 89% | 3038 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,131 psi | 89% | 3051 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,593 psi | 86% | 2969 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,479 psi | 90% | 3018 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,884 psi | 88% | 3114 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 59% | 1946 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,608 psi | 86% | 2949 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 55,811 psi | 86% | 3028 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,841 psi | 89% | 2963 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,637 psi | 86% | 3035 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,869 psi | 86% | 2917 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,159 psi | 88% | 3061 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,914 psi | 89% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,435 psi | 88% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,695 psi | 86% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,073 psi | 60% | 1988 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,769 psi | 89% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,768 psi | 87% | 3071 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 58,189 psi | 90% | 2992 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,725 psi | 89% | 3009 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,158 psi | 85% | 2989 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,363 psi | 88% | 3005 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,725 psi | 89% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,073 psi | 89% | 2966 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,522 psi | 89% | 2999 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 57,638 psi | 89% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,130 psi | 88% | 3054 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 58,726 psi | 90% | 3058 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,971 psi | 88% | 3071 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 58,711 psi | 90% | 3143 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,493 psi | 88% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,638 psi | 89% | 2972 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% | 50,270 psi | 77% | 2828 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,079 psi | 71% | 2841 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 52,823 psi | 81% | 2982 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 54,302 psi | 84% | 2963 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,661 psi | 76% | 2913 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 37,362 psi | 57% | 2651 fps | 97.1% |
| ADI AR 2218 | 81.4 gr | 90% | 46,064 psi | 71% | 2936 fps | 96.3% |
| ADI AR 2225 | <<locked>> | 80% | 34,693 psi | 53% | 2621 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,070 psi | 83% | 2953 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,401 psi | 78% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,168 psi | 76% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,337 psi | 67% | 2789 fps | 100% |
| Alliant Reloder-33 | 79.2 gr | 86% | 44,440 psi | 68% | 2848 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,715 psi | 69% | 2844 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,978 psi | 72% | 2818 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 47,079 psi | 72% | 2848 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 40,524 psi | 62% | 2730 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 50,401 psi | 78% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 40,727 psi | 63% | 2733 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 80% | 52,011 psi | 80% | 2910 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,981 psi | 78% | 2890 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,656 psi | 66% | 2854 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,689 psi | 44% | 1742 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,170 psi | 80% | 2890 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 48,588 psi | 75% | 2900 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,418 psi | 84% | 2904 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,621 psi | 53% | 2598 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 43,395 psi | 67% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,837 psi | 51% | 2562 fps | 97.1% |
| Norma MRP | <<locked>> | 80% | 53,954 psi | 83% | 2986 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,603 psi | 76% | 2923 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 44,759 psi | 69% | 2789 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,443 psi | 45% | 1781 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,395 psi | 65% | 2831 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,870 psi | 60% | 2713 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 54,520 psi | 84% | 2933 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 54,012 psi | 83% | 2946 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 48,008 psi | 74% | 2858 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,664 psi | 83% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,128 psi | 83% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,674 psi | 73% | 2792 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,021 psi | 72% | 2805 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 54,172 psi | 83% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,272 psi | 82% | 2989 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 44,788 psi | 69% | 2805 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 80% | 39,885 psi | 61% | 2733 fps | 95.7% |
| Vihtavuori N570 | 74.4 gr | 84% | 44,063 psi | 68% | 2858 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,545 psi | 76% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,212 psi | 77% | 2851 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 | 139gr | Norma PlastSpitz. ADI AR 2218 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,946 fps to 3,166 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 139.0 gr projectile in 0.264" calls for a 1:10.0 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 | 139gr | Norma PlastSpitz 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.