Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 100gr | Winchester Pointed Soft Point bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N568 and Winchester StaBALL HD.
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>> | 90% | 58,160 psi | 90% | 3366 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,189 psi | 90% | 3399 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,087 psi | 88% | 3461 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 86% | 55,376 psi | 85% | 3396 fps | 99% |
| ADI AR 2213 | <<locked>> | 90% | 57,696 psi | 89% | 3471 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 98% | 56,449 psi | 87% | 3432 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,187 psi | 85% | 3451 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,361 psi | 85% | 3402 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,798 psi | 90% | 3448 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,059 psi | 89% | 3465 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,883 psi | 86% | 3373 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,159 psi | 86% | 3438 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,782 psi | 87% | 3458 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,508 psi | 90% | 3415 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 57,217 psi | 88% | 3445 fps | 99.2% |
| Bofors RP30 | <<locked>> | 96% | 56,028 psi | 86% | 3438 fps | 98.7% |
| Bofors RP5 | <<locked>> | 90% | 58,059 psi | 89% | 3465 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 96% | 58,088 psi | 89% | 3465 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 88% | 56,826 psi | 87% | 3396 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,738 psi | 86% | 3373 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,724 psi | 86% | 3320 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,071 psi | 85% | 3517 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,434 psi | 58% | 2257 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,870 psi | 89% | 3383 fps | 99.7% |
| IMR 4831 | <<locked>> | 84% | 58,450 psi | 90% | 3389 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,334 psi | 88% | 3376 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 90% | 55,912 psi | 86% | 3445 fps | 98.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,444 psi | 78% | 3337 fps | 97.5% |
| Lovex S065 | <<locked>> | 82% | 57,798 psi | 89% | 3363 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,318 psi | 87% | 3356 fps | 99.8% |
| Lovex S071 | <<locked>> | 94% | 55,956 psi | 86% | 3330 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,463 psi | 85% | 3376 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 51,198 psi | 79% | 3369 fps | 99.3% |
| Norma MRP | <<locked>> | 88% | 58,378 psi | 90% | 3488 fps | 99.9% |
| Norma URP | <<locked>> | 82% | 56,217 psi | 87% | 3376 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,174 psi | 88% | 3468 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 82% | 55,405 psi | 85% | 3376 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 92% | 55,869 psi | 86% | 3389 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,377 psi | 59% | 2310 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,639 psi | 90% | 3422 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,159 psi | 88% | 3448 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,449 psi | 87% | 3510 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,927 psi | 86% | 3448 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 86% | 56,144 psi | 86% | 3366 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 88% | 58,552 psi | 90% | 3442 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,798 psi | 89% | 3363 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,318 psi | 87% | 3356 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,029 psi | 88% | 3310 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,131 psi | 89% | 3438 fps | 99.4% |
| Somchem S361 | <<locked>> | 86% | 57,870 psi | 89% | 3350 fps | 98.1% |
| Somchem S365 | <<locked>> | 84% | 57,769 psi | 89% | 3386 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,303 psi | 85% | 3343 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 82% | 57,783 psi | 89% | 3369 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,245 psi | 85% | 3327 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,203 psi | 88% | 3373 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,885 psi | 89% | 3409 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,812 psi | 89% | 3481 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 94% | 58,624 psi | 90% | 3461 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 96% | 56,376 psi | 87% | 3458 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,580 psi | 89% | 3307 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,637 psi | 86% | 3455 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,172 psi | 85% | 3337 fps | 99% |
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% | 41,104 psi | 63% | 3028 fps | 98.1% |
| Accurate 4350 | <<locked>> | 80% | 54,215 psi | 83% | 3333 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 49,342 psi | 76% | 3301 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 45,179 psi | 70% | 3182 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 46,688 psi | 72% | 3248 fps | 96.1% |
| ADI AR 2217 | <<locked>> | 90% | 42,569 psi | 66% | 3136 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 88% | 36,216 psi | 56% | 3005 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,764 psi | 80% | 3337 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,005 psi | 69% | 3173 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,118 psi | 63% | 3100 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,784 psi | 61% | 3054 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,447 psi | 53% | 2949 fps | 96.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,049 psi | 69% | 3232 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,897 psi | 84% | 3346 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 40,901 psi | 63% | 3094 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 42,467 psi | 65% | 3146 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 41,118 psi | 63% | 3100 fps | 95.6% |
| Hodgdon H1000 | <<locked>> | 86% | 40,538 psi | 62% | 3084 fps | 95% |
| Hodgdon H4831 | <<locked>> | 82% | 46,282 psi | 71% | 3179 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 82% | 45,382 psi | 70% | 3159 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,617 psi | 75% | 3196 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 84% | 38,667 psi | 60% | 3123 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 43% | 2028 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,850 psi | 78% | 3255 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 51,256 psi | 79% | 3264 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 47,210 psi | 73% | 3176 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 84% | 45,165 psi | 70% | 3219 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 43,743 psi | 67% | 3189 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 54,331 psi | 84% | 3301 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,895 psi | 81% | 3291 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 35,317 psi | 54% | 2884 fps | 96.3% |
| Norma 204 | <<locked>> | 80% | 51,590 psi | 79% | 3301 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 38,392 psi | 59% | 3071 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 43,627 psi | 67% | 3186 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 52,663 psi | 81% | 3314 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 45,368 psi | 70% | 3232 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 51,605 psi | 79% | 3304 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 37,942 psi | 58% | 3002 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 44% | 2073 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,549 psi | 84% | 3353 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,026 psi | 82% | 3376 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 35,505 psi | 55% | 3012 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 47,863 psi | 74% | 3284 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 45,948 psi | 71% | 3156 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 44,585 psi | 69% | 3159 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,331 psi | 84% | 3301 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,895 psi | 81% | 3291 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,301 psi | 82% | 3245 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,237 psi | 68% | 3153 fps | 96.7% |
| Somchem S361 | <<locked>> | 80% | 47,094 psi | 72% | 3140 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 50,357 psi | 78% | 3261 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,107 psi | 69% | 3136 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 80% | 53,983 psi | 83% | 3304 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,247 psi | 60% | 2986 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 53,519 psi | 82% | 3307 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,338 psi | 68% | 3153 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 46,572 psi | 72% | 3248 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 44,454 psi | 68% | 3169 fps | 95% |
| Vihtavuori N568 | 86.9 gr | 94% | 52,286 psi | 80% | 3376 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,679 psi | 83% | 3248 fps | 100% |
| Winchester StaBALL HD | 72.8 gr | 80% | 37,463 psi | 58% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,437 psi | 64% | 3048 fps | 95.9% |
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 62 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 100gr | Winchester Pointed Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,517 fps; across all powders the maximum-charge window runs from 2,257 fps to 3,517 fps. ADI AR 2225 gives the best case fill at 100 %, and 62 of the 62 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 100.0 gr projectile in 0.264" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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, Vihtavuori N568, Winchester StaBALL HD rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 100gr | Winchester Pointed 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.