Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Winchester Powerpoint 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 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 56,072 psi | 86% | 2907 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,869 psi | 88% | 3025 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 82% | 55,825 psi | 86% | 3012 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 90% | 55,869 psi | 86% | 3005 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 56,710 psi | 87% | 3136 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 92% | 56,115 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,478 psi | 87% | 3005 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 58,726 psi | 90% | 2963 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,014 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 54,766 psi | 84% | 3038 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,172 psi | 85% | 3031 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,724 psi | 86% | 2972 fps | 98.8% |
| Bofors RP15 | <<locked>> | 84% | 56,115 psi | 86% | 3002 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,970 psi | 86% | 3015 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,478 psi | 87% | 3005 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,232 psi | 88% | 3022 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 58,030 psi | 89% | 3002 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,942 psi | 88% | 2986 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,028 psi | 86% | 3084 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,189 psi | 59% | 1952 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,696 psi | 89% | 2972 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 58,552 psi | 90% | 3061 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,405 psi | 87% | 2933 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 58,784 psi | 90% | 3074 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 58,421 psi | 90% | 2943 fps | 100% |
| Norma 217 | <<locked>> | 94% | 56,666 psi | 87% | 3035 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,130 psi | 86% | 3022 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 58,668 psi | 90% | 3009 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,320 psi | 61% | 1998 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 56,782 psi | 87% | 3068 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 55,840 psi | 86% | 3041 fps | 99.7% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 58,349 psi | 90% | 3028 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 84% | 56,782 psi | 87% | 2936 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,376 psi | 87% | 2969 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 86% | 57,667 psi | 89% | 3028 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,101 psi | 86% | 3041 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 90% | 57,798 psi | 89% | 3114 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,681 psi | 87% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,304 psi | 87% | 2940 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% | 52,417 psi | 81% | 2851 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 45,614 psi | 70% | 2818 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 80% | 52,069 psi | 80% | 2946 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 39,291 psi | 60% | 2687 fps | 97.9% |
| ADI AR 2218 | 80.8 gr | 86% | 42,076 psi | 65% | 2828 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 36,608 psi | 56% | 2657 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,779 psi | 81% | 2943 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,459 psi | 79% | 2858 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,774 psi | 70% | 2818 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 43,743 psi | 67% | 2818 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 88% | 44,280 psi | 68% | 2818 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,950 psi | 75% | 2851 fps | 97.6% |
| Bofors RP15 | <<locked>> | 80% | 49,226 psi | 76% | 2877 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 42,627 psi | 66% | 2762 fps | 98.6% |
| Bofors RP5 | <<locked>> | 80% | 52,779 psi | 81% | 2943 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,786 psi | 66% | 2762 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 80% | 54,215 psi | 83% | 2940 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,229 psi | 82% | 2923 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,107 psi | 69% | 2887 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,790 psi | 44% | 1749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 54,259 psi | 84% | 2917 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 50,865 psi | 78% | 2930 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 52,982 psi | 82% | 2874 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,142 psi | 53% | 2569 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 45,339 psi | 70% | 2730 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,925 psi | 54% | 2602 fps | 98.1% |
| Ramshot Grand | <<locked>> | 80% | 52,170 psi | 80% | 2956 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 47,021 psi | 72% | 2818 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,544 psi | 45% | 1785 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,078 psi | 69% | 2864 fps | 100% |
| ReloadSwiss RS 80 | 76.5 gr | 80% | 41,321 psi | 64% | 2756 fps | 96.9% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 47,558 psi | 73% | 2835 fps | 95.9% |
| Vihtavuori N165 | <<locked>> | 80% | 49,676 psi | 76% | 2818 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 49,226 psi | 76% | 2838 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 80% | 47,181 psi | 73% | 2841 fps | 99% |
| Vihtavuori N568 | <<locked>> | 80% | 42,192 psi | 65% | 2769 fps | 96.7% |
| Vihtavuori N570 | 77.3 gr | 84% | 46,688 psi | 72% | 2900 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,533 psi | 81% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,388 psi | 81% | 2877 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 | 140gr | Winchester Powerpoint. ADI AR 2218 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,136 fps. Accurate 8700 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 140.0 gr projectile in 0.264" calls for a 1:14.0 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, ReloadSwiss RS 80 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 140gr | Winchester Powerpoint 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.