Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 105gr | Lehigh Defense Match Solid bullet and 64 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 80 and Vihtavuori N568.
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% | 58,044 psi | 89% | 3310 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,102 psi | 89% | 3337 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,985 psi | 86% | 3406 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 88% | 56,927 psi | 88% | 3406 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 86% | 55,506 psi | 85% | 3340 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 90% | 57,609 psi | 89% | 3409 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 56,231 psi | 87% | 3376 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,882 psi | 84% | 3392 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,738 psi | 86% | 3333 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,376 psi | 85% | 3340 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,129 psi | 85% | 3327 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,986 psi | 89% | 3406 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,883 psi | 86% | 3317 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,202 psi | 86% | 3386 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,797 psi | 87% | 3402 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,523 psi | 90% | 3363 fps | 96.8% |
| Bofors RP15 | <<locked>> | 92% | 57,159 psi | 88% | 3389 fps | 99.4% |
| Bofors RP30 | <<locked>> | 96% | 55,956 psi | 86% | 3383 fps | 98.9% |
| Bofors RP5 | <<locked>> | 90% | 57,986 psi | 89% | 3406 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 96% | 57,885 psi | 89% | 3402 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 56,898 psi | 88% | 3337 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,811 psi | 86% | 3320 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,637 psi | 86% | 3258 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,955 psi | 85% | 3461 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,434 psi | 58% | 2198 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,885 psi | 89% | 3327 fps | 99.8% |
| IMR 4831 | <<locked>> | 84% | 58,465 psi | 90% | 3327 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,334 psi | 88% | 3320 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 90% | 55,854 psi | 86% | 3389 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,256 psi | 77% | 3284 fps | 97.8% |
| Lovex S065 | <<locked>> | 82% | 57,870 psi | 89% | 3301 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,405 psi | 87% | 3297 fps | 99.9% |
| Lovex S071 | <<locked>> | 94% | 55,782 psi | 86% | 3271 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,317 psi | 85% | 3317 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 51,039 psi | 79% | 3314 fps | 99.5% |
| Norma MRP | <<locked>> | 88% | 58,131 psi | 89% | 3425 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,304 psi | 87% | 3317 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,246 psi | 88% | 3415 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 55,274 psi | 85% | 3317 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,883 psi | 86% | 3337 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 59% | 2251 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,552 psi | 90% | 3363 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,101 psi | 88% | 3389 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,144 psi | 86% | 3451 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,796 psi | 86% | 3399 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 86% | 56,014 psi | 86% | 3307 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 88% | 58,479 psi | 90% | 3383 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,870 psi | 89% | 3301 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,405 psi | 87% | 3297 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,956 psi | 88% | 3248 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,073 psi | 89% | 3379 fps | 99.5% |
| Somchem S361 | <<locked>> | 86% | 57,870 psi | 89% | 3297 fps | 98.4% |
| Somchem S365 | <<locked>> | 84% | 57,769 psi | 89% | 3323 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,259 psi | 85% | 3287 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 82% | 57,711 psi | 89% | 3307 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,129 psi | 85% | 3264 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 82% | 57,232 psi | 88% | 3314 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,812 psi | 89% | 3346 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,580 psi | 89% | 3419 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 94% | 58,595 psi | 90% | 3409 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 56,130 psi | 86% | 3399 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,609 psi | 89% | 3251 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,637 psi | 86% | 3402 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,085 psi | 85% | 3278 fps | 99.2% |
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% | 41,118 psi | 63% | 2979 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 54,273 psi | 84% | 3274 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 45,078 psi | 69% | 3173 fps | 96% |
| Accurate MAGPRO | <<locked>> | 84% | 49,385 psi | 76% | 3255 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 45,223 psi | 70% | 3130 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 43,453 psi | 67% | 3117 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 42,424 psi | 65% | 3084 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 33,881 psi | 52% | 2894 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,484 psi | 70% | 3130 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,721 psi | 80% | 3278 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,063 psi | 69% | 3117 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,176 psi | 63% | 3054 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,740 psi | 61% | 3002 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,461 psi | 53% | 2907 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,165 psi | 70% | 3182 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,824 psi | 84% | 3294 fps | 95.9% |
| Bofors RP15 | <<locked>> | 82% | 41,002 psi | 63% | 3048 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 42,496 psi | 65% | 3097 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 41,176 psi | 63% | 3054 fps | 96.1% |
| Hodgdon H1000 | <<locked>> | 86% | 40,509 psi | 62% | 3038 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 82% | 46,282 psi | 71% | 3127 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 45,353 psi | 70% | 3107 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,747 psi | 75% | 3140 fps | 100% |
| Hodgdon Retumbo | 72.2 gr | 84% | 38,566 psi | 59% | 3074 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 43% | 1975 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,879 psi | 78% | 3196 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 51,271 psi | 79% | 3209 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,338 psi | 68% | 3058 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 45,208 psi | 70% | 3169 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 43,598 psi | 67% | 3136 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 54,288 psi | 84% | 3238 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,910 psi | 81% | 3235 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 35,360 psi | 54% | 2835 fps | 96.7% |
| Norma 204 | <<locked>> | 80% | 51,764 psi | 80% | 3248 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 35,650 psi | 55% | 2953 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 43,642 psi | 67% | 3133 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 52,678 psi | 81% | 3255 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 42,163 psi | 65% | 3104 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 51,764 psi | 80% | 3251 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 37,927 psi | 58% | 2959 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,790 psi | 44% | 2021 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,592 psi | 84% | 3294 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,142 psi | 82% | 3320 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 35,505 psi | 55% | 2969 fps | 95.7% |
| ReloadSwiss RS 80 | 85.4 gr | 92% | 47,761 psi | 74% | 3235 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 46,122 psi | 71% | 3107 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 44,599 psi | 69% | 3107 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,288 psi | 84% | 3238 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,910 psi | 81% | 3235 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,345 psi | 82% | 3186 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,266 psi | 68% | 3100 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 47,166 psi | 73% | 3091 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 50,401 psi | 78% | 3202 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,194 psi | 70% | 3084 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 80% | 54,056 psi | 83% | 3245 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,276 psi | 60% | 2936 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 53,447 psi | 82% | 3248 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,338 psi | 68% | 3100 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 46,659 psi | 72% | 3199 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 44,483 psi | 68% | 3123 fps | 95.5% |
| Vihtavuori N568 | 82.5 gr | 92% | 48,414 psi | 75% | 3245 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,621 psi | 83% | 3189 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,579 psi | 58% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,582 psi | 64% | 2999 fps | 96.3% |
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 64 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 105gr | Lehigh Defense Match Solid. Hodgdon Retumbo delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,198 fps to 3,461 fps. ADI AR 2225 gives the best case fill at 100 %, and 64 of the 64 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 105.0 gr projectile in 0.264" calls for a 1:9.0 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 80, Vihtavuori N568 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 105gr | Lehigh Defense Match Solid 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.