Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 129gr | Nosler AccuBond Long Range bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 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>> | 86% | 57,479 psi | 88% | 3038 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 56,652 psi | 87% | 3146 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 84% | 58,523 psi | 90% | 3127 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,188 psi | 88% | 3143 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,536 psi | 87% | 3127 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 57,188 psi | 88% | 3251 fps | 98.4% |
| ADI AR 2225 | <<locked>> | 96% | 56,014 psi | 86% | 3150 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,914 psi | 89% | 3114 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,740 psi | 89% | 3136 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,057 psi | 86% | 3041 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,695 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,652 psi | 87% | 3127 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,911 psi | 85% | 3150 fps | 97.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,984 psi | 85% | 3136 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,406 psi | 88% | 3097 fps | 98.3% |
| Bofors RP15 | <<locked>> | 88% | 57,116 psi | 88% | 3127 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,594 psi | 87% | 3136 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 57,740 psi | 89% | 3136 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,899 psi | 89% | 3146 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,985 psi | 86% | 3071 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 58,726 psi | 90% | 3117 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 58,595 psi | 90% | 3028 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,115 psi | 86% | 3212 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,913 psi | 58% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,188 psi | 86% | 3051 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,680 psi | 86% | 3123 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,882 psi | 84% | 3120 fps | 99.7% |
| Lovex S071 | <<locked>> | 90% | 55,898 psi | 86% | 3015 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,217 psi | 87% | 3146 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,943 psi | 89% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,130 psi | 88% | 3153 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 55,680 psi | 86% | 3077 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,856 psi | 60% | 2051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,971 psi | 88% | 3192 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,159 psi | 86% | 3156 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 58,566 psi | 90% | 3094 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,841 psi | 89% | 3110 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,464 psi | 88% | 3104 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,492 psi | 87% | 3028 fps | 99.4% |
| Somchem S385 | <<locked>> | 84% | 58,102 psi | 89% | 3074 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 58,233 psi | 90% | 3064 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,566 psi | 89% | 3087 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 84% | 57,783 psi | 89% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,232 psi | 88% | 3156 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 58,494 psi | 90% | 3150 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 56,521 psi | 87% | 3159 fps | 99% |
| Vihtavuori N570 | <<locked>> | 94% | 58,117 psi | 89% | 3228 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,869 psi | 88% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 58,117 psi | 89% | 3074 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% | 47,094 psi | 72% | 2864 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 49,124 psi | 76% | 3005 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 51,068 psi | 79% | 3002 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 46,369 psi | 71% | 2943 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 37,101 psi | 57% | 2730 fps | 96% |
| ADI AR 2218 | 82.3 gr | 92% | 45,687 psi | 70% | 3005 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 31,894 psi | 49% | 2625 fps | 96.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,952 psi | 78% | 2992 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,137 psi | 73% | 2946 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,876 psi | 71% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,074 psi | 62% | 2815 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,634 psi | 81% | 3061 fps | 100% |
| Alliant Reloder-33 | 82 gr | 90% | 47,326 psi | 73% | 3002 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,413 psi | 73% | 2989 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,135 psi | 68% | 2844 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 43,990 psi | 68% | 2877 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 37,492 psi | 58% | 2743 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 47,137 psi | 73% | 2946 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 37,652 psi | 58% | 2746 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 48,907 psi | 75% | 2943 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,950 psi | 74% | 2923 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 54,984 psi | 85% | 2972 fps | 100% |
| Hodgdon Retumbo | 67.5 gr | 80% | 39,117 psi | 60% | 2864 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 44% | 1795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,385 psi | 76% | 2927 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 45,252 psi | 70% | 2927 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,506 psi | 56% | 2733 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 40,553 psi | 62% | 2733 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 32,053 psi | 49% | 2631 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 50,357 psi | 78% | 3022 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,716 psi | 70% | 2943 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 80% | 41,234 psi | 63% | 2805 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 45% | 1841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,711 psi | 60% | 2841 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 41,481 psi | 64% | 2864 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 51,517 psi | 79% | 2972 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 50,734 psi | 78% | 2986 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,386 psi | 78% | 2979 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 52,794 psi | 81% | 2966 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 50,966 psi | 78% | 2956 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 44,759 psi | 69% | 2828 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 50,314 psi | 77% | 2953 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 50,778 psi | 78% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,821 psi | 77% | 3018 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 41,669 psi | 64% | 2825 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 42,482 psi | 65% | 2881 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 90% | 50,343 psi | 77% | 3084 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,368 psi | 70% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,166 psi | 73% | 2884 fps | 99.3% |
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 | 129gr | Nosler AccuBond Long Range. ADI AR 2218 delivers the highest muzzle velocity at 3,251 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,251 fps. Hodgdon TrailBoss 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 58–90 %, leaving at least 10 % headroom. The 129.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. 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. Hodgdon Retumbo, ADI AR 2218, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 129gr | Nosler AccuBond Long Range 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.