Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 90gr | Impala LWHV LS bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Accurate High Country 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% | 56,086 psi | 86% | 3458 fps | 99.7% |
| Accurate 4350 | <<locked>> | 82% | 56,289 psi | 87% | 3504 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,782 psi | 87% | 3606 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 90% | 57,914 psi | 89% | 3606 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 88% | 56,347 psi | 87% | 3540 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 92% | 58,189 psi | 90% | 3606 fps | 97.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,840 psi | 87% | 3560 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,721 psi | 80% | 3514 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,695 psi | 87% | 3537 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,159 psi | 86% | 3556 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,072 psi | 86% | 3527 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,129 psi | 85% | 3537 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,739 psi | 87% | 3527 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,289 psi | 87% | 3583 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,624 psi | 89% | 3619 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 58,015 psi | 89% | 3593 fps | 98.6% |
| Bofors RP30 | <<locked>> | 98% | 56,652 psi | 87% | 3576 fps | 98% |
| Bofors RP5 | <<locked>> | 90% | 55,129 psi | 85% | 3537 fps | 98.3% |
| Bofors RP7 | <<locked>> | 82% | 57,217 psi | 88% | 3491 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 98% | 58,392 psi | 90% | 3593 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 57,058 psi | 88% | 3543 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 90% | 57,885 psi | 89% | 3533 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,724 psi | 87% | 3514 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,840 psi | 87% | 3471 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,187 psi | 85% | 3655 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 82% | 57,928 psi | 89% | 3576 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 58% | 2349 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,506 psi | 85% | 3465 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,030 psi | 89% | 3510 fps | 99.5% |
| IMR 4831 | <<locked>> | 84% | 56,202 psi | 86% | 3484 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,436 psi | 90% | 3517 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 92% | 56,347 psi | 87% | 3579 fps | 97.4% |
| Lovex S065 | <<locked>> | 82% | 55,999 psi | 86% | 3458 fps | 99.8% |
| Lovex S070 | <<locked>> | 84% | 58,073 psi | 89% | 3514 fps | 99.6% |
| Lovex S071 | <<locked>> | 96% | 57,392 psi | 88% | 3484 fps | 99.8% |
| Norma 204 | <<locked>> | 84% | 56,579 psi | 87% | 3520 fps | 98.2% |
| Norma 217ᴾ | <<locked>> | 100% | 47,935 psi | 74% | 3435 fps | 98% |
| Norma MRP | <<locked>> | 88% | 55,100 psi | 85% | 3563 fps | 99.2% |
| Norma URP | <<locked>> | 84% | 57,595 psi | 89% | 3537 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,479 psi | 88% | 3606 fps | 98% |
| Ramshot Hunter | <<locked>> | 84% | 56,492 psi | 87% | 3527 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 94% | 56,536 psi | 87% | 3527 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,464 psi | 59% | 2405 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,028 psi | 86% | 3514 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,943 psi | 89% | 3602 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,579 psi | 87% | 3648 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,420 psi | 87% | 3589 fps | 96.6% |
| Rottweil R 904 | <<locked>> | 88% | 57,145 psi | 88% | 3504 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 88% | 55,840 psi | 86% | 3517 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 82% | 57,217 psi | 88% | 3491 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,999 psi | 86% | 3458 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 84% | 58,073 psi | 89% | 3514 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,769 psi | 90% | 3458 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,419 psi | 85% | 3510 fps | 98.3% |
| Somchem S361 | <<locked>> | 86% | 55,434 psi | 85% | 3419 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 55,129 psi | 85% | 3484 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,623 psi | 87% | 3491 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 55,564 psi | 86% | 3465 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,231 psi | 87% | 3465 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 84% | 58,595 psi | 90% | 3527 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,492 psi | 85% | 3504 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,450 psi | 90% | 3622 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 94% | 55,912 psi | 86% | 3537 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,784 psi | 90% | 3465 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,217 psi | 88% | 3547 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,579 psi | 86% | 3612 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,231 psi | 87% | 3474 fps | 98.4% |
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% | 40,596 psi | 62% | 3130 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 52,736 psi | 81% | 3435 fps | 99.9% |
| Accurate High Country | 74.7 gr | 84% | 49,690 psi | 76% | 3455 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 88% | 54,114 psi | 83% | 3527 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 43,308 psi | 67% | 3258 fps | 95% |
| ADI AR 2213 | <<locked>> | 86% | 47,718 psi | 73% | 3386 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 46,499 psi | 72% | 3337 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 92% | 39,871 psi | 61% | 3222 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,874 psi | 68% | 3261 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,342 psi | 76% | 3428 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,511 psi | 67% | 3255 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 84% | 45,237 psi | 70% | 3327 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,406 psi | 59% | 3153 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 35,781 psi | 55% | 3104 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,018 psi | 66% | 3323 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 44,991 psi | 69% | 3314 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 46,441 psi | 71% | 3366 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 45,237 psi | 70% | 3327 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 53,722 psi | 83% | 3425 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 90% | 44,512 psi | 69% | 3297 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 53,316 psi | 82% | 3471 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 50,618 psi | 78% | 3389 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 49,835 psi | 77% | 3373 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,862 psi | 72% | 3291 fps | 100% |
| Hodgdon Retumbo | 75.4 gr | 88% | 42,467 psi | 65% | 3343 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 53,867 psi | 83% | 3501 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,224 psi | 43% | 2116 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,994 psi | 75% | 3333 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,563 psi | 84% | 3445 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 49,516 psi | 76% | 3360 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 51,663 psi | 80% | 3383 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 88% | 49,255 psi | 76% | 3435 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 52,866 psi | 81% | 3396 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 51,300 psi | 79% | 3383 fps | 98.8% |
| Lovex S071 | <<locked>> | 80% | 35,273 psi | 54% | 2989 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 49,588 psi | 76% | 3379 fps | 96.8% |
| Norma 217 | <<locked>> | 94% | 39,320 psi | 61% | 3222 fps | 95% |
| Norma MRP | <<locked>> | 80% | 41,771 psi | 64% | 3268 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 50,662 psi | 78% | 3406 fps | 99.8% |
| Ramshot Grand | <<locked>> | 86% | 46,325 psi | 71% | 3369 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 49,661 psi | 76% | 3392 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 42,177 psi | 65% | 3228 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,848 psi | 44% | 2162 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,359 psi | 81% | 3445 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,256 psi | 77% | 3458 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 39,494 psi | 61% | 3241 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 52,170 psi | 80% | 3501 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 82% | 47,413 psi | 73% | 3304 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 42,989 psi | 66% | 3241 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 53,722 psi | 83% | 3425 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,866 psi | 81% | 3396 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 51,300 psi | 79% | 3383 fps | 98.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,851 psi | 80% | 3333 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,641 psi | 66% | 3232 fps | 95% |
| Somchem S361 | <<locked>> | 84% | 51,924 psi | 80% | 3350 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 48,269 psi | 74% | 3356 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,918 psi | 68% | 3225 fps | 96.4% |
| Vihtavuori N160 | <<locked>> | 80% | 52,112 psi | 80% | 3399 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 40,814 psi | 63% | 3133 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 51,576 psi | 79% | 3399 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 43,076 psi | 66% | 3251 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 86% | 51,169 psi | 79% | 3474 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 48,994 psi | 75% | 3392 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,314 psi | 79% | 3340 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,505 psi | 82% | 3478 fps | 99% |
| Winchester StaBALL HD | 70.4 gr | 80% | 35,273 psi | 54% | 3179 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 43,091 psi | 66% | 3196 fps | 95.1% |
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 67 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 90gr | Impala LWHV LS. Hodgdon Retumbo delivers the highest muzzle velocity at 3,655 fps; across all powders the maximum-charge window runs from 2,349 fps to 3,655 fps. ADI AR 2217 gives the best case fill at 100 %, and 67 of the 67 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 90.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Hodgdon TrailBoss 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, Accurate High Country, Winchester StaBALL HD rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 90gr | Impala LWHV LS 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.