Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 100gr | Barnes TTSX BT bullet and 68 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 Vihtavuori N560.
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% | 55,129 psi | 85% | 3323 fps | 99.9% |
| Accurate 4350 | <<locked>> | 82% | 55,448 psi | 85% | 3363 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,985 psi | 88% | 3484 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 90% | 58,392 psi | 90% | 3491 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 88% | 56,768 psi | 87% | 3425 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 90% | 55,056 psi | 85% | 3425 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,464 psi | 88% | 3458 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,083 psi | 80% | 3402 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,739 psi | 87% | 3432 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,260 psi | 87% | 3409 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,361 psi | 85% | 3419 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,000 psi | 88% | 3399 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,217 psi | 88% | 3465 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,870 psi | 89% | 3488 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 58,320 psi | 90% | 3471 fps | 99.3% |
| Bofors RP30 | <<locked>> | 98% | 57,014 psi | 88% | 3461 fps | 98.8% |
| Bofors RP5 | <<locked>> | 90% | 55,361 psi | 85% | 3419 fps | 99% |
| Bofors RP7 | <<locked>> | 82% | 56,797 psi | 87% | 3363 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 96% | 55,042 psi | 85% | 3412 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 57,087 psi | 88% | 3422 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 58,407 psi | 90% | 3425 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,232 psi | 88% | 3406 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,913 psi | 88% | 3343 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,086 psi | 86% | 3543 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 82% | 58,276 psi | 90% | 3455 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 57% | 2251 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,622 psi | 86% | 3346 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,363 psi | 90% | 3392 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 55,840 psi | 86% | 3353 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,726 psi | 90% | 3406 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 92% | 57,101 psi | 88% | 3471 fps | 98.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,195 psi | 73% | 3274 fps | 96.5% |
| Lovex S065 | <<locked>> | 82% | 55,593 psi | 86% | 3327 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,653 psi | 89% | 3383 fps | 99.9% |
| Lovex S071 | <<locked>> | 96% | 56,463 psi | 87% | 3343 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,811 psi | 87% | 3402 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 47,964 psi | 74% | 3307 fps | 98.7% |
| Norma MRP | <<locked>> | 88% | 55,303 psi | 85% | 3435 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 57,580 psi | 89% | 3406 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,450 psi | 90% | 3501 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 84% | 56,594 psi | 87% | 3402 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,130 psi | 88% | 3419 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 59% | 2297 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,709 psi | 86% | 3383 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,726 psi | 90% | 3478 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,392 psi | 88% | 3537 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,768 psi | 87% | 3474 fps | 97.6% |
| Rottweil R 904 | <<locked>> | 88% | 57,624 psi | 89% | 3396 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 88% | 56,014 psi | 86% | 3402 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 82% | 56,797 psi | 87% | 3363 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,593 psi | 86% | 3327 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,653 psi | 89% | 3383 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,378 psi | 90% | 3333 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,608 psi | 86% | 3396 fps | 99% |
| Somchem S361 | <<locked>> | 86% | 55,376 psi | 85% | 3307 fps | 97.6% |
| Somchem S365 | <<locked>> | 84% | 54,969 psi | 85% | 3346 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,405 psi | 87% | 3369 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 82% | 55,521 psi | 85% | 3337 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,333 psi | 87% | 3350 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 84% | 58,624 psi | 90% | 3402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 58,624 psi | 90% | 3428 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,911 psi | 85% | 3432 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 94% | 55,564 psi | 86% | 3409 fps | 97.9% |
| Vihtavuori N568 | <<locked>> | 98% | 57,261 psi | 88% | 3481 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,129 psi | 85% | 3278 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,319 psi | 88% | 3425 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,623 psi | 87% | 3481 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,405 psi | 87% | 3363 fps | 99.1% |
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% | 38,551 psi | 59% | 2976 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 51,474 psi | 79% | 3287 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 45,774 psi | 70% | 3245 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 86% | 50,328 psi | 77% | 3330 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 43,047 psi | 66% | 3140 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 84% | 44,396 psi | 68% | 3196 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 92% | 43,192 psi | 66% | 3153 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 90% | 36,506 psi | 56% | 3022 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,400 psi | 76% | 3297 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,917 psi | 66% | 3127 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 41,698 psi | 64% | 3123 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,420 psi | 58% | 3009 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,343 psi | 50% | 2890 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,235 psi | 65% | 3176 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 41,481 psi | 64% | 3117 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 42,888 psi | 66% | 3163 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 41,698 psi | 64% | 3123 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 53,403 psi | 82% | 3301 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 88% | 41,191 psi | 63% | 3110 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 53,229 psi | 82% | 3346 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 84% | 47,210 psi | 73% | 3205 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 46,427 psi | 71% | 3189 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,485 psi | 72% | 3159 fps | 100% |
| Hodgdon Retumbo | 74.6 gr | 86% | 39,030 psi | 60% | 3140 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 54,027 psi | 83% | 3379 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 43% | 2021 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,834 psi | 75% | 3215 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,752 psi | 84% | 3330 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 48,834 psi | 75% | 3225 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 45,295 psi | 70% | 3136 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 45,948 psi | 71% | 3241 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 43,903 psi | 68% | 3196 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 52,098 psi | 80% | 3264 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 50,604 psi | 78% | 3255 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 32,996 psi | 51% | 2822 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 49,458 psi | 76% | 3258 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 38,377 psi | 59% | 3077 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 41,075 psi | 63% | 3130 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 50,314 psi | 77% | 3274 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 42,859 psi | 66% | 3176 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 49,414 psi | 76% | 3268 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 38,479 psi | 59% | 3025 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,471 psi | 44% | 2064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,880 psi | 80% | 3310 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,473 psi | 78% | 3333 fps | 100% |
| ReloadSwiss RS 76 | 78 gr | 84% | 35,839 psi | 55% | 3028 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 48,443 psi | 75% | 3304 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 44,106 psi | 68% | 3120 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 42,337 psi | 65% | 3114 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 80% | 53,403 psi | 82% | 3301 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,098 psi | 80% | 3264 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 50,604 psi | 78% | 3255 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,169 psi | 79% | 3209 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,003 psi | 65% | 3104 fps | 95.9% |
| Somchem S361 | <<locked>> | 82% | 48,370 psi | 74% | 3169 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 47,805 psi | 74% | 3222 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,844 psi | 66% | 3091 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 80% | 51,721 psi | 80% | 3271 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 39,972 psi | 62% | 3009 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 51,082 psi | 79% | 3268 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,771 psi | 64% | 3100 fps | 99.5% |
| Vihtavuori N560 | 75.6 gr | 84% | 47,514 psi | 73% | 3278 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 88% | 44,889 psi | 69% | 3186 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 49,327 psi | 76% | 3320 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,445 psi | 79% | 3219 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,447 psi | 82% | 3353 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,679 psi | 53% | 3022 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 42,409 psi | 65% | 3074 fps | 96% |
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 68 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 100gr | Barnes TTSX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,543 fps; across all powders the maximum-charge window runs from 2,251 fps to 3,543 fps. ADI AR 2217 gives the best case fill at 100 %, and 68 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.264" calls for a 1:10.0 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, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 100gr | Barnes TTSX BT 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.