Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Nosler Custom Competition 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% | 57,305 psi | 88% | 2927 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,417 psi | 82% | 2972 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 82% | 56,608 psi | 87% | 3038 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 58,218 psi | 90% | 3015 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,101 psi | 88% | 3035 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,739 psi | 87% | 3022 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,406 psi | 88% | 3153 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 56,666 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,609 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,682 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,101 psi | 86% | 2930 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,971 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,593 psi | 86% | 3058 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,898 psi | 86% | 3054 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,942 psi | 88% | 2992 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 57,130 psi | 88% | 3022 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,884 psi | 88% | 3035 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,682 psi | 89% | 3028 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,102 psi | 89% | 3041 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,492 psi | 85% | 2959 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,378 psi | 90% | 3009 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,811 psi | 87% | 3104 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,029 psi | 59% | 1936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,695 psi | 86% | 2940 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 55,738 psi | 86% | 3018 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,044 psi | 89% | 2956 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,608 psi | 86% | 3028 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,014 psi | 86% | 2910 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,159 psi | 88% | 3054 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,827 psi | 89% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,377 psi | 88% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,680 psi | 86% | 2969 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,175 psi | 60% | 1982 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,508 psi | 89% | 3087 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,565 psi | 87% | 3061 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 58,059 psi | 89% | 2979 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,624 psi | 89% | 2999 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,216 psi | 85% | 2982 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,261 psi | 88% | 2992 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,856 psi | 89% | 2963 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,001 psi | 89% | 2953 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,508 psi | 89% | 2992 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 57,740 psi | 89% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,087 psi | 88% | 3048 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 58,697 psi | 90% | 3048 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,942 psi | 88% | 3064 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 58,494 psi | 90% | 3130 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,406 psi | 88% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,595 psi | 89% | 2963 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% | 50,169 psi | 77% | 2815 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,093 psi | 71% | 2835 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 80% | 52,750 psi | 81% | 2972 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 54,404 psi | 84% | 2956 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,748 psi | 77% | 2907 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 37,260 psi | 57% | 2644 fps | 97.1% |
| ADI AR 2218 | 79.1 gr | 88% | 42,656 psi | 66% | 2848 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 34,621 psi | 53% | 2615 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,969 psi | 83% | 2943 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,488 psi | 78% | 2907 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,226 psi | 76% | 2825 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,410 psi | 67% | 2782 fps | 100% |
| Alliant Reloder-33 | 78.8 gr | 86% | 44,454 psi | 68% | 2841 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,730 psi | 69% | 2838 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,920 psi | 72% | 2812 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 46,992 psi | 72% | 2841 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 40,451 psi | 62% | 2723 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 50,488 psi | 78% | 2907 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 40,640 psi | 63% | 2723 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 80% | 51,909 psi | 80% | 2900 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,097 psi | 79% | 2884 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,554 psi | 65% | 2844 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,718 psi | 44% | 1732 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,257 psi | 80% | 2881 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 48,515 psi | 75% | 2890 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,375 psi | 84% | 2894 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,548 psi | 53% | 2592 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 43,453 psi | 67% | 2694 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,750 psi | 50% | 2556 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 54,085 psi | 83% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,501 psi | 76% | 2913 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 44,701 psi | 69% | 2779 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,351 psi | 65% | 2822 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,972 psi | 60% | 2710 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 54,621 psi | 84% | 2927 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 53,911 psi | 83% | 2936 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 48,022 psi | 74% | 2848 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,563 psi | 82% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,230 psi | 83% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,601 psi | 73% | 2785 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,007 psi | 72% | 2799 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 54,056 psi | 83% | 2904 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,403 psi | 82% | 2982 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 44,860 psi | 69% | 2799 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 39,813 psi | 61% | 2723 fps | 95.7% |
| Vihtavuori N570 | 74 gr | 84% | 44,005 psi | 68% | 2851 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,472 psi | 76% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,314 psi | 77% | 2844 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 | Nosler Custom Competition. ADI AR 2218 delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,153 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 1:9.5 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 | 140gr | Nosler Custom Competition 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.