Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | Speer Spitzer Soft Point bullet and 50 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 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>> | 86% | 56,695 psi | 87% | 3117 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 54,911 psi | 85% | 3212 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 84% | 55,840 psi | 86% | 3219 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 84% | 57,682 psi | 89% | 3205 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 56,550 psi | 87% | 3222 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 94% | 55,608 psi | 86% | 3196 fps | 99.6% |
| ADI AR 2218 | <<locked>> | 98% | 56,246 psi | 87% | 3310 fps | 97.6% |
| ADI AR 2225 | <<locked>> | 96% | 55,085 psi | 85% | 3222 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,276 psi | 88% | 3192 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,058 psi | 88% | 3215 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,158 psi | 85% | 3120 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,811 psi | 86% | 3196 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,854 psi | 86% | 3202 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 58,392 psi | 90% | 3291 fps | 97.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 58,479 psi | 90% | 3278 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,724 psi | 87% | 3173 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 56,492 psi | 87% | 3202 fps | 99.9% |
| Bofors RP30 | <<locked>> | 92% | 55,782 psi | 86% | 3209 fps | 99.6% |
| Bofors RP5 | <<locked>> | 86% | 57,058 psi | 88% | 3215 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 57,029 psi | 88% | 3219 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 84% | 55,274 psi | 85% | 3146 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 86% | 58,117 psi | 89% | 3196 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,812 psi | 89% | 3110 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,259 psi | 85% | 3284 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,797 psi | 58% | 2083 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,463 psi | 85% | 3123 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 86% | 55,027 psi | 85% | 3202 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,841 psi | 89% | 3258 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 58,682 psi | 90% | 3146 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,492 psi | 85% | 3222 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,246 psi | 88% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,217 psi | 87% | 3225 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 88% | 54,810 psi | 84% | 3146 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 60% | 2133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,159 psi | 86% | 3268 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,521 psi | 85% | 3228 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 84% | 58,088 psi | 89% | 3176 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 57,014 psi | 88% | 3182 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,637 psi | 87% | 3182 fps | 99.9% |
| Somchem S361 | <<locked>> | 82% | 55,695 psi | 86% | 3100 fps | 99% |
| Somchem S385 | <<locked>> | 84% | 57,435 psi | 88% | 3153 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,566 psi | 89% | 3143 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,869 psi | 88% | 3156 fps | 96% |
| Vihtavuori N555 | <<locked>> | 84% | 56,956 psi | 88% | 3153 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,536 psi | 87% | 3228 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 90% | 57,928 psi | 89% | 3228 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 55,840 psi | 86% | 3228 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 94% | 57,319 psi | 88% | 3297 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,840 psi | 86% | 3212 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,435 psi | 88% | 3153 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% | 46,325 psi | 71% | 2933 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 51,039 psi | 79% | 3136 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 80% | 48,428 psi | 75% | 3071 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 80% | 50,328 psi | 77% | 3074 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 45,730 psi | 70% | 3009 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 84% | 39,160 psi | 60% | 2854 fps | 96.1% |
| ADI AR 2218 | 87.1 gr | 94% | 48,428 psi | 75% | 3143 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 31,415 psi | 48% | 2677 fps | 95.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,212 psi | 77% | 3064 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,499 psi | 72% | 3015 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,179 psi | 70% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,305 psi | 60% | 2877 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,735 psi | 80% | 3133 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 50,357 psi | 78% | 3140 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 50,401 psi | 78% | 3123 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 46,601 psi | 72% | 2976 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 43,308 psi | 67% | 2943 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 36,782 psi | 57% | 2799 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 46,499 psi | 72% | 3015 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 37,086 psi | 57% | 2805 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 48,095 psi | 74% | 3009 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,355 psi | 73% | 2992 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 54,346 psi | 84% | 3058 fps | 100% |
| Hodgdon Retumbo | 70 gr | 80% | 38,479 psi | 59% | 2920 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 44% | 1867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,733 psi | 75% | 2995 fps | 98% |
| IMR 7828 SSC | <<locked>> | 80% | 44,440 psi | 68% | 2989 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 88% | 38,348 psi | 59% | 2851 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 39,914 psi | 61% | 2799 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 33,794 psi | 52% | 2746 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 49,516 psi | 76% | 3091 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 44,889 psi | 69% | 3005 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 80% | 40,596 psi | 62% | 2867 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,182 psi | 45% | 1909 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,985 psi | 58% | 2890 fps | 98.4% |
| ReloadSwiss RS 80 | 81.2 gr | 86% | 44,092 psi | 68% | 2995 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 50,865 psi | 78% | 3045 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 49,995 psi | 77% | 3058 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,647 psi | 76% | 3054 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 52,185 psi | 80% | 3038 fps | 98.5% |
| Somchem S385 | <<locked>> | 80% | 50,372 psi | 78% | 3031 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 44,077 psi | 68% | 2894 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 90% | 53,127 psi | 82% | 3087 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 50,009 psi | 77% | 3035 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,023 psi | 75% | 3087 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 80% | 41,002 psi | 63% | 2884 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 86% | 44,962 psi | 69% | 3012 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 90% | 49,458 psi | 76% | 3143 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,440 psi | 68% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,543 psi | 72% | 2953 fps | 98.8% |
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 50 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 120gr | Speer Spitzer Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 2,083 fps to 3,310 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 50 of the 50 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 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, 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, ADI AR 2218, ReloadSwiss RS 80 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 120gr | Speer Spitzer Soft Point 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.