Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | Nosler Expansion Tip bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N568.
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>> | 88% | 57,319 psi | 88% | 3130 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,564 psi | 86% | 3228 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 86% | 56,666 psi | 87% | 3235 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 84% | 54,897 psi | 84% | 3163 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 88% | 57,435 psi | 88% | 3241 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 96% | 56,130 psi | 86% | 3212 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,913 psi | 88% | 3327 fps | 97.6% |
| ADI AR 2225 | <<locked>> | 98% | 55,303 psi | 85% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,291 psi | 90% | 3215 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,740 psi | 89% | 3232 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,811 psi | 86% | 3140 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,202 psi | 86% | 3209 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,391 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,697 psi | 90% | 3304 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,972 psi | 89% | 3196 fps | 97.8% |
| Bofors RP15 | <<locked>> | 90% | 56,927 psi | 88% | 3219 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 55,883 psi | 86% | 3215 fps | 99.6% |
| Bofors RP5 | <<locked>> | 88% | 57,740 psi | 89% | 3232 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 57,827 psi | 89% | 3238 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 56,173 psi | 86% | 3166 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,259 psi | 85% | 3153 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 54,998 psi | 85% | 3074 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,550 psi | 85% | 3301 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 58% | 2073 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,985 psi | 88% | 3140 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,609 psi | 89% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,594 psi | 87% | 3146 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 88% | 55,753 psi | 86% | 3219 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,157 psi | 83% | 3199 fps | 99.4% |
| Lovex S071 | <<locked>> | 92% | 55,288 psi | 85% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,624 psi | 90% | 3205 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 55,230 psi | 85% | 3225 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,798 psi | 89% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,203 psi | 88% | 3248 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 58,610 psi | 90% | 3202 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 55,535 psi | 85% | 3166 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,537 psi | 59% | 2119 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,594 psi | 87% | 3284 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,724 psi | 86% | 3238 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 84% | 55,448 psi | 85% | 3133 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 57,928 psi | 89% | 3205 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,537 psi | 89% | 3199 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 56,826 psi | 87% | 3120 fps | 99.1% |
| Somchem S365 | <<locked>> | 82% | 57,159 psi | 88% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,305 psi | 90% | 3173 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,450 psi | 90% | 3159 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,638 psi | 89% | 3173 fps | 96% |
| Vihtavuori N555 | <<locked>> | 86% | 57,464 psi | 88% | 3169 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,217 psi | 88% | 3248 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 92% | 58,320 psi | 90% | 3241 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 56,072 psi | 86% | 3241 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 96% | 57,638 psi | 89% | 3310 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,057 psi | 86% | 3225 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,421 psi | 90% | 3169 fps | 99.9% |
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% | 43,366 psi | 67% | 2877 fps | 99.6% |
| Accurate High Country | <<locked>> | 80% | 47,979 psi | 74% | 3081 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 80% | 45,513 psi | 70% | 3015 fps | 96.3% |
| ADI AR 2209 | <<locked>> | 80% | 47,776 psi | 74% | 3028 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 43,004 psi | 66% | 2956 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 86% | 39,378 psi | 61% | 2867 fps | 96% |
| ADI AR 2218 | <<locked>> | 96% | 48,849 psi | 75% | 3156 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 82% | 31,285 psi | 48% | 2677 fps | 95.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,688 psi | 73% | 3022 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,642 psi | 67% | 2959 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,366 psi | 65% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,637 psi | 56% | 2822 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,443 psi | 75% | 3084 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 50,430 psi | 78% | 3150 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,413 psi | 73% | 2995 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 40,669 psi | 63% | 2890 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 39,407 psi | 61% | 2874 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 43,642 psi | 67% | 2959 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 82% | 37,347 psi | 57% | 2815 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 45,672 psi | 70% | 2966 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,730 psi | 69% | 2943 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,547 psi | 79% | 3018 fps | 100% |
| Hodgdon Retumbo | 68 gr | 80% | 35,853 psi | 55% | 2858 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,239 psi | 43% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,388 psi | 82% | 3081 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 54,099 psi | 83% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,485 psi | 72% | 2956 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 41,771 psi | 64% | 2936 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 38,014 psi | 59% | 2854 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 37,159 psi | 57% | 2740 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 54,592 psi | 84% | 3140 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 33,301 psi | 51% | 2743 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 46,499 psi | 72% | 3041 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 42,018 psi | 65% | 2949 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 80% | 54,665 psi | 84% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,739 psi | 58% | 2808 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,892 psi | 44% | 1900 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,230 psi | 54% | 2825 fps | 97.3% |
| ReloadSwiss RS 80 | 80.7 gr | 88% | 44,092 psi | 68% | 3002 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 48,660 psi | 75% | 3005 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 47,282 psi | 73% | 3009 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,963 psi | 72% | 3002 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 49,588 psi | 76% | 2992 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 53,330 psi | 82% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,529 psi | 73% | 2979 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 41,597 psi | 64% | 2844 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 92% | 53,679 psi | 83% | 3100 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 46,963 psi | 72% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,166 psi | 71% | 3031 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 82% | 41,060 psi | 63% | 2894 fps | 95.8% |
| Vihtavuori N568 | 78 gr | 88% | 45,005 psi | 69% | 3022 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 94% | 53,447 psi | 82% | 3232 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,915 psi | 63% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,888 psi | 68% | 2904 fps | 98.2% |
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 54 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 120gr | Nosler Expansion Tip. ADI AR 2218 delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,327 fps. ADI AR 2218 gives the best case fill at 100 %, and 54 of the 54 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 120.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Hodgdon TrailBoss, IMR 8133 Enduron 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, ReloadSwiss RS 80, Vihtavuori N568 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 120gr | Nosler Expansion Tip 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.