Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 155gr | CutEdge DGSC bullet and 42 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>> | 82% | 55,463 psi | 85% | 2776 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,478 psi | 87% | 2904 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 55,738 psi | 86% | 2887 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 55,695 psi | 86% | 2877 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 56,260 psi | 87% | 3012 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 92% | 55,767 psi | 86% | 2900 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,246 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 58,392 psi | 90% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 55,854 psi | 86% | 2861 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 58,465 psi | 90% | 2982 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 58,508 psi | 90% | 2979 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,608 psi | 86% | 2851 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 55,695 psi | 86% | 2867 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,506 psi | 85% | 2884 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,246 psi | 87% | 2877 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 56,826 psi | 87% | 2894 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 57,754 psi | 89% | 2871 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,840 psi | 87% | 2858 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 55,840 psi | 86% | 2956 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,145 psi | 59% | 1847 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,479 psi | 88% | 2844 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 58,407 psi | 90% | 2933 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,275 psi | 87% | 2812 fps | 97% |
| IMR 8133 Enduron | <<locked>> | 96% | 58,407 psi | 90% | 2943 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 57,856 psi | 89% | 2867 fps | 96.3% |
| Lovex S071 | <<locked>> | 88% | 57,740 psi | 89% | 2808 fps | 100% |
| Norma 217 | <<locked>> | 94% | 56,101 psi | 86% | 2907 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 55,956 psi | 86% | 2894 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 58,276 psi | 90% | 2877 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,334 psi | 61% | 1890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 56,405 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 55,114 psi | 85% | 2910 fps | 99.9% |
| Shooters World 50 BMG | <<locked>> | 92% | 57,856 psi | 89% | 2867 fps | 96.3% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 57,653 psi | 89% | 2904 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 51,068 psi | 79% | 2812 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 84% | 56,463 psi | 87% | 2805 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,782 psi | 86% | 2844 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 86% | 57,159 psi | 88% | 2897 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 55,593 psi | 86% | 2917 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 57,537 psi | 89% | 2989 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,115 psi | 86% | 2867 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,985 psi | 86% | 2812 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% | 51,793 psi | 80% | 2720 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 41,829 psi | 64% | 2638 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 80% | 51,953 psi | 80% | 2822 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,899 psi | 60% | 2572 fps | 98.6% |
| ADI AR 2218 | 76.4 gr | 86% | 41,539 psi | 64% | 2713 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 36,201 psi | 56% | 2543 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,533 psi | 81% | 2818 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,169 psi | 79% | 2730 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,397 psi | 70% | 2694 fps | 100% |
| Alliant Reloder-33 | 74.2 gr | 82% | 40,045 psi | 62% | 2631 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 88% | 43,453 psi | 67% | 2700 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,805 psi | 75% | 2733 fps | 98.3% |
| Bofors RP15 | <<locked>> | 80% | 48,820 psi | 75% | 2753 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,148 psi | 65% | 2644 fps | 99.1% |
| Bofors RP5 | <<locked>> | 80% | 52,533 psi | 81% | 2818 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,583 psi | 66% | 2648 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 80% | 53,954 psi | 83% | 2815 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,069 psi | 82% | 2799 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 44,904 psi | 69% | 2769 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,703 psi | 44% | 1650 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 54,070 psi | 83% | 2792 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 50,676 psi | 78% | 2805 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,414 psi | 76% | 2694 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,620 psi | 52% | 2461 fps | 96.5% |
| Lovex D100 | <<locked>> | 90% | 53,838 psi | 83% | 2802 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 44,715 psi | 69% | 2602 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,243 psi | 53% | 2487 fps | 98.7% |
| Ramshot Grand | <<locked>> | 80% | 51,982 psi | 80% | 2831 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 46,586 psi | 72% | 2697 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 45% | 1686 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 44,614 psi | 69% | 2740 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,727 psi | 63% | 2638 fps | 97.7% |
| Shooters World 50 BMG | <<locked>> | 90% | 53,838 psi | 83% | 2802 fps | 95.4% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 43,700 psi | 67% | 2654 fps | 95.7% |
| Vihtavuori 20N29 | <<locked>> | 98% | 47,355 psi | 73% | 2743 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 49,342 psi | 76% | 2694 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 45,513 psi | 70% | 2657 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 80% | 46,644 psi | 72% | 2717 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 80% | 41,698 psi | 64% | 2654 fps | 97.5% |
| Vihtavuori N570 | 71.4 gr | 82% | 42,960 psi | 66% | 2710 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,112 psi | 80% | 2808 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,257 psi | 80% | 2756 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 42 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 155gr | CutEdge DGSC. ADI AR 2218 delivers the highest muzzle velocity at 3,012 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,012 fps. Accurate 8700 gives the best case fill at 100 %, and 42 of the 42 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 155.0 gr projectile in 0.264" calls for a 1:9.5 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 | 155gr | CutEdge DGSC 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.