Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 156gr | Norma Soft Point ALASKA bullet and 39 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-50.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 58,146 psi | 89% | 2799 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 55,390 psi | 85% | 2877 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 82% | 57,870 psi | 89% | 2907 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 58,117 psi | 89% | 2904 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 55,172 psi | 85% | 2979 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 92% | 58,610 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 58,450 psi | 90% | 2897 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 57,087 psi | 88% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 58,407 psi | 90% | 2884 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 57,130 psi | 88% | 2949 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 57,914 psi | 89% | 2956 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 57,638 psi | 89% | 2874 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 58,102 psi | 89% | 2894 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 58,334 psi | 90% | 2917 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 58,450 psi | 90% | 2897 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 55,492 psi | 85% | 2861 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 54,839 psi | 84% | 2927 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,406 psi | 59% | 1847 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 56,855 psi | 88% | 2897 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 58,407 psi | 90% | 2838 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 57,377 psi | 88% | 2917 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 56,391 psi | 87% | 2838 fps | 96.2% |
| Lovex S071 | <<locked>> | 86% | 56,811 psi | 87% | 2782 fps | 100% |
| Norma 217 | <<locked>> | 92% | 55,521 psi | 85% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 58,566 psi | 90% | 2920 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 58,581 psi | 90% | 2972 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 84% | 56,840 psi | 87% | 2848 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,436 psi | 61% | 1890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 55,201 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 58,320 psi | 90% | 2949 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 56,391 psi | 87% | 2838 fps | 96.2% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 56,855 psi | 88% | 2881 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 53,983 psi | 83% | 2851 fps | 97% |
| Vihtavuori N165 | <<locked>> | 84% | 58,711 psi | 90% | 2828 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 58,276 psi | 90% | 2874 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 84% | 56,014 psi | 86% | 2871 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 58,407 psi | 90% | 2949 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 56,275 psi | 87% | 2956 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 82% | 58,262 psi | 90% | 2835 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% | 54,447 psi | 84% | 2746 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 41,365 psi | 64% | 2618 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 80% | 54,056 psi | 83% | 2848 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 41,162 psi | 63% | 2608 fps | 99.1% |
| ADI AR 2218 | 75.8 gr | 84% | 40,843 psi | 63% | 2690 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 38,551 psi | 59% | 2585 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 54,737 psi | 84% | 2841 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 53,447 psi | 82% | 2749 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 47,674 psi | 73% | 2720 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 39,523 psi | 61% | 2608 fps | 95.2% |
| Alliant Reloder-50 | 78.8 gr | 86% | 43,207 psi | 66% | 2684 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 50,618 psi | 78% | 2756 fps | 98.7% |
| Bofors RP15 | <<locked>> | 80% | 51,169 psi | 79% | 2782 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 44,614 psi | 69% | 2680 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 54,737 psi | 84% | 2841 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 44,904 psi | 69% | 2684 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 47,558 psi | 73% | 2802 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,790 psi | 44% | 1647 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 53,069 psi | 82% | 2835 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 48,066 psi | 74% | 2661 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 35,882 psi | 55% | 2507 fps | 97.5% |
| Lovex D100 | <<locked>> | 88% | 52,620 psi | 81% | 2772 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 47,108 psi | 73% | 2631 fps | 100% |
| Norma 217 | <<locked>> | 80% | 36,825 psi | 57% | 2536 fps | 99.4% |
| Ramshot Grand | <<locked>> | 80% | 54,607 psi | 84% | 2861 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 54,592 psi | 84% | 2907 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 80% | 49,298 psi | 76% | 2730 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,747 psi | 46% | 1690 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 47,529 psi | 73% | 2782 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 43,337 psi | 67% | 2680 fps | 98.5% |
| Shooters World 50 BMG | <<locked>> | 88% | 52,620 psi | 81% | 2772 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 43,265 psi | 67% | 2635 fps | 95.8% |
| Vihtavuori 20N29 | <<locked>> | 96% | 46,934 psi | 72% | 2723 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 51,605 psi | 79% | 2720 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 44,585 psi | 69% | 2628 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 80% | 48,994 psi | 75% | 2749 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 44,135 psi | 68% | 2694 fps | 98.2% |
| Vihtavuori N570 | 70.7 gr | 80% | 42,279 psi | 65% | 2684 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 54,288 psi | 84% | 2776 fps | 100% |
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 39 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 156gr | Norma Soft Point ALASKA. ADI AR 2218 delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,847 fps to 2,979 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 39 of the 39 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 156.0 gr projectile in 0.264" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori 20N29 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-50 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 156gr | Norma Soft Point ALASKA 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.