Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 100gr | Nosler Ballistic Tip Hunting bullet and 65 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 76 and Accurate MAGPRO.
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% | 57,435 psi | 88% | 3356 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,580 psi | 89% | 3392 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,361 psi | 85% | 3448 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 88% | 56,405 psi | 87% | 3448 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 88% | 58,653 psi | 90% | 3455 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 90% | 56,985 psi | 88% | 3458 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 98% | 55,564 psi | 86% | 3419 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,302 psi | 84% | 3438 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,508 psi | 90% | 3455 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,117 psi | 89% | 3438 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,377 psi | 88% | 3451 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,361 psi | 85% | 3366 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,419 psi | 85% | 3428 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,985 psi | 86% | 3448 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,001 psi | 89% | 3406 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 56,724 psi | 87% | 3442 fps | 99.2% |
| Bofors RP30 | <<locked>> | 96% | 55,303 psi | 85% | 3425 fps | 98.6% |
| Bofors RP5 | <<locked>> | 90% | 57,377 psi | 88% | 3451 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 58,682 psi | 90% | 3396 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 57,174 psi | 88% | 3448 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 88% | 56,347 psi | 87% | 3386 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,259 psi | 85% | 3366 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,682 psi | 90% | 3369 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,465 psi | 90% | 3583 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 58% | 2254 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,130 psi | 88% | 3373 fps | 99.7% |
| IMR 4831 | <<locked>> | 84% | 57,928 psi | 89% | 3383 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,710 psi | 87% | 3366 fps | 98% |
| IMR 7828 SSC | <<locked>> | 90% | 55,201 psi | 85% | 3432 fps | 98.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,559 psi | 76% | 3323 fps | 97.3% |
| Lovex S065 | <<locked>> | 82% | 57,261 psi | 88% | 3353 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,796 psi | 86% | 3346 fps | 99.8% |
| Lovex S071 | <<locked>> | 94% | 55,259 psi | 85% | 3320 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,653 psi | 90% | 3432 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 50,444 psi | 78% | 3353 fps | 99.2% |
| Norma MRP | <<locked>> | 88% | 57,682 psi | 89% | 3474 fps | 99.9% |
| Norma URP | <<locked>> | 82% | 55,651 psi | 86% | 3366 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,376 psi | 87% | 3458 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 84% | 58,508 psi | 90% | 3432 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,216 psi | 85% | 3379 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,348 psi | 59% | 2306 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,841 psi | 89% | 3412 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,579 psi | 87% | 3442 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,463 psi | 85% | 3494 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,027 psi | 85% | 3435 fps | 97.3% |
| Rottweil R 904 | <<locked>> | 86% | 55,477 psi | 85% | 3356 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 88% | 57,783 psi | 89% | 3432 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 58,682 psi | 90% | 3396 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,261 psi | 88% | 3353 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,796 psi | 86% | 3346 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,521 psi | 87% | 3301 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,377 psi | 88% | 3425 fps | 99.3% |
| Somchem S361 | <<locked>> | 86% | 57,261 psi | 88% | 3340 fps | 98% |
| Somchem S365 | <<locked>> | 84% | 56,942 psi | 88% | 3376 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,407 psi | 90% | 3399 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 82% | 57,246 psi | 88% | 3363 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,262 psi | 90% | 3379 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 82% | 56,710 psi | 87% | 3363 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,116 psi | 88% | 3399 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,101 psi | 88% | 3468 fps | 98% |
| Vihtavuori N565 | <<locked>> | 94% | 57,928 psi | 89% | 3451 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 96% | 55,463 psi | 85% | 3442 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,898 psi | 88% | 3301 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,795 psi | 84% | 3448 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,508 psi | 90% | 3392 fps | 99.4% |
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% | 3018 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 53,621 psi | 83% | 3323 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,556 psi | 69% | 3212 fps | 95.3% |
| Accurate MAGPRO | 78 gr | 84% | 48,849 psi | 75% | 3294 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 44,657 psi | 69% | 3173 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 46,021 psi | 71% | 3232 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 45,150 psi | 69% | 3199 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 88% | 35,824 psi | 55% | 2995 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,155 psi | 79% | 3327 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,527 psi | 69% | 3159 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,611 psi | 63% | 3091 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,233 psi | 60% | 3045 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,982 psi | 52% | 2940 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,498 psi | 68% | 3222 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,375 psi | 84% | 3340 fps | 95.4% |
| Bofors RP15 | <<locked>> | 82% | 40,408 psi | 62% | 3084 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 44,962 psi | 69% | 3205 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 40,611 psi | 63% | 3091 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 55,071 psi | 85% | 3327 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 42,931 psi | 66% | 3150 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 82% | 45,629 psi | 70% | 3166 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 48,037 psi | 74% | 3219 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,254 psi | 74% | 3192 fps | 100% |
| Hodgdon Retumbo | 75.5 gr | 86% | 40,930 psi | 63% | 3189 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 43% | 2021 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,386 psi | 78% | 3245 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 50,676 psi | 78% | 3255 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 46,775 psi | 72% | 3166 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 44,643 psi | 69% | 3205 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 43,105 psi | 66% | 3176 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 53,795 psi | 83% | 3294 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 52,373 psi | 81% | 3281 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 34,969 psi | 54% | 2874 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 51,053 psi | 79% | 3291 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 37,753 psi | 58% | 3054 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 43,120 psi | 66% | 3176 fps | 97.6% |
| Norma URP | <<locked>> | 80% | 52,127 psi | 80% | 3304 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 44,846 psi | 69% | 3219 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 51,097 psi | 79% | 3297 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 37,507 psi | 58% | 2995 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 44% | 2070 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,027 psi | 83% | 3346 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,475 psi | 81% | 3366 fps | 100% |
| ReloadSwiss RS 76 | 78.9 gr | 84% | 37,724 psi | 58% | 3081 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 47,007 psi | 72% | 3268 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 45,629 psi | 70% | 3153 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 44,092 psi | 68% | 3150 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 55,071 psi | 85% | 3327 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,795 psi | 83% | 3294 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 52,373 psi | 81% | 3281 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,808 psi | 81% | 3235 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,743 psi | 67% | 3143 fps | 96.6% |
| Somchem S361 | <<locked>> | 80% | 46,659 psi | 72% | 3130 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 49,734 psi | 77% | 3251 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,614 psi | 69% | 3130 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 80% | 53,447 psi | 82% | 3297 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,783 psi | 60% | 2972 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 52,997 psi | 82% | 3301 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,801 psi | 67% | 3143 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 46,064 psi | 71% | 3235 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 47,007 psi | 72% | 3228 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 94% | 51,605 psi | 79% | 3366 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,214 psi | 82% | 3245 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,811 psi | 57% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,988 psi | 63% | 3038 fps | 95.6% |
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 65 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 100gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,583 fps; across all powders the maximum-charge window runs from 2,254 fps to 3,583 fps. ADI AR 2225 gives the best case fill at 100 %, and 65 of the 65 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 1:11.0 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, ReloadSwiss RS 76, Accurate MAGPRO rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 100gr | Nosler Ballistic Tip Hunting 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.