Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 100gr | Barnes Solid bullet and 67 powders. The key underlying parameters are shown in the table above.
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% | 56,898 psi | 88% | 3350 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,232 psi | 88% | 3386 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,810 psi | 84% | 3435 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 88% | 55,883 psi | 86% | 3438 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 88% | 58,320 psi | 90% | 3451 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 90% | 56,681 psi | 87% | 3451 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 98% | 55,303 psi | 85% | 3415 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,824 psi | 83% | 3428 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,160 psi | 90% | 3451 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,812 psi | 89% | 3435 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,072 psi | 88% | 3445 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,581 psi | 90% | 3422 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,114 psi | 85% | 3425 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,680 psi | 86% | 3445 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,580 psi | 89% | 3399 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 56,246 psi | 87% | 3432 fps | 99.1% |
| Bofors RP30 | <<locked>> | 96% | 55,071 psi | 85% | 3422 fps | 98.5% |
| Bofors RP5 | <<locked>> | 90% | 57,072 psi | 88% | 3445 fps | 99.2% |
| Bofors RP7 | <<locked>> | 82% | 58,378 psi | 90% | 3389 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 96% | 56,927 psi | 88% | 3445 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 82% | 58,711 psi | 90% | 3445 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 55,883 psi | 86% | 3379 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,798 psi | 90% | 3432 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,349 psi | 90% | 3366 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,914 psi | 89% | 3573 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 58% | 2254 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,840 psi | 87% | 3366 fps | 99.6% |
| IMR 4831 | <<locked>> | 84% | 57,609 psi | 89% | 3379 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,478 psi | 87% | 3360 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 92% | 58,798 psi | 90% | 3497 fps | 98.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,095 psi | 76% | 3310 fps | 97.1% |
| Lovex S065 | <<locked>> | 82% | 56,971 psi | 88% | 3346 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,492 psi | 85% | 3340 fps | 99.8% |
| Lovex S071 | <<locked>> | 96% | 58,508 psi | 90% | 3376 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,363 psi | 90% | 3428 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 49,951 psi | 77% | 3346 fps | 99.1% |
| Norma MRP | <<locked>> | 88% | 57,130 psi | 88% | 3465 fps | 99.8% |
| Norma URP | <<locked>> | 82% | 55,317 psi | 85% | 3363 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,072 psi | 86% | 3455 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 84% | 58,204 psi | 90% | 3428 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,679 psi | 84% | 3373 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,261 psi | 59% | 2303 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,537 psi | 89% | 3406 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,043 psi | 86% | 3432 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,940 psi | 85% | 3484 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,563 psi | 84% | 3428 fps | 97.1% |
| Rottweil R 904 | <<locked>> | 86% | 55,187 psi | 85% | 3346 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 88% | 57,479 psi | 88% | 3425 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 82% | 58,378 psi | 90% | 3389 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,971 psi | 88% | 3346 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,492 psi | 85% | 3340 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,014 psi | 86% | 3294 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,072 psi | 88% | 3419 fps | 99.2% |
| Somchem S361 | <<locked>> | 86% | 56,840 psi | 87% | 3333 fps | 97.9% |
| Somchem S365 | <<locked>> | 84% | 56,594 psi | 87% | 3369 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,928 psi | 89% | 3392 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 82% | 56,927 psi | 88% | 3360 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,986 psi | 89% | 3373 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 82% | 56,188 psi | 86% | 3356 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,753 psi | 87% | 3396 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,594 psi | 87% | 3458 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 94% | 57,464 psi | 88% | 3442 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 96% | 55,042 psi | 85% | 3432 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,652 psi | 87% | 3297 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,711 psi | 90% | 3445 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,755 psi | 90% | 3510 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,001 psi | 89% | 3386 fps | 99.3% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 40,466 psi | 62% | 3018 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 53,490 psi | 82% | 3323 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,266 psi | 68% | 3205 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 84% | 48,327 psi | 74% | 3284 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 44,353 psi | 68% | 3166 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 45,730 psi | 70% | 3225 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 92% | 44,701 psi | 69% | 3189 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 88% | 35,462 psi | 55% | 2986 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,778 psi | 78% | 3320 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,411 psi | 68% | 3156 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,321 psi | 62% | 3084 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,943 psi | 60% | 3041 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,707 psi | 52% | 2930 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,150 psi | 68% | 3215 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,983 psi | 83% | 3330 fps | 95.2% |
| Bofors RP15 | <<locked>> | 82% | 40,132 psi | 62% | 3074 fps | 95% |
| Bofors RP30 | <<locked>> | 90% | 44,512 psi | 69% | 3199 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 40,321 psi | 62% | 3084 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 54,752 psi | 84% | 3320 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 42,728 psi | 66% | 3143 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 54,839 psi | 84% | 3376 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 84% | 48,704 psi | 75% | 3235 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 84% | 47,747 psi | 73% | 3215 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,906 psi | 74% | 3182 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 40,654 psi | 63% | 3182 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 43% | 2021 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,082 psi | 77% | 3238 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 50,357 psi | 78% | 3251 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 46,514 psi | 72% | 3159 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 44,208 psi | 68% | 3196 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 42,641 psi | 66% | 3166 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 53,490 psi | 82% | 3287 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 52,054 psi | 80% | 3278 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 34,722 psi | 53% | 2867 fps | 96% |
| Norma 204 | <<locked>> | 80% | 50,763 psi | 78% | 3284 fps | 98% |
| Norma 217 | <<locked>> | 92% | 37,492 psi | 58% | 3054 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 42,801 psi | 66% | 3169 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 51,793 psi | 80% | 3297 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 44,541 psi | 69% | 3215 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 50,792 psi | 78% | 3291 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 82% | 37,072 psi | 57% | 2986 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 44% | 2070 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,679 psi | 83% | 3343 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,156 psi | 80% | 3363 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 37,492 psi | 58% | 3074 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 50,430 psi | 78% | 3343 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 45,382 psi | 70% | 3146 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 43,772 psi | 67% | 3143 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 54,752 psi | 84% | 3320 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,490 psi | 82% | 3287 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 52,054 psi | 80% | 3278 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,533 psi | 81% | 3228 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,439 psi | 67% | 3136 fps | 96.4% |
| Somchem S361 | <<locked>> | 80% | 46,441 psi | 71% | 3127 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 49,429 psi | 76% | 3245 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,324 psi | 68% | 3120 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 80% | 53,316 psi | 82% | 3297 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,667 psi | 60% | 2972 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 52,707 psi | 81% | 3294 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,468 psi | 67% | 3136 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 45,788 psi | 70% | 3232 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 88% | 46,731 psi | 72% | 3222 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 51,169 psi | 79% | 3356 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,750 psi | 81% | 3235 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,839 psi | 84% | 3376 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,463 psi | 56% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,712 psi | 63% | 3031 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 100gr | Barnes Solid. Hodgdon Retumbo delivers the highest muzzle velocity at 3,573 fps; across all powders the maximum-charge window runs from 2,254 fps to 3,573 fps. ADI AR 2218 gives the best case fill at 100 %, and 73 of the 73 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 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.