Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 110gr | Hasler Hunting bullet and 57 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 Ramshot Grand.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 56,086 psi | 86% | 3219 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 57,769 psi | 89% | 3376 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 86% | 54,969 psi | 85% | 3307 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 86% | 57,290 psi | 88% | 3314 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 88% | 55,695 psi | 86% | 3320 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 58,349 psi | 90% | 3356 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,188 psi | 88% | 3373 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,479 psi | 88% | 3307 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,188 psi | 88% | 3307 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,855 psi | 88% | 3297 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,159 psi | 86% | 3314 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,870 psi | 89% | 3284 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,392 psi | 90% | 3356 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,636 psi | 84% | 3304 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,695 psi | 87% | 3369 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,492 psi | 87% | 3271 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 55,361 psi | 85% | 3297 fps | 99.4% |
| Bofors RP30 | <<locked>> | 96% | 58,131 psi | 89% | 3363 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 56,159 psi | 86% | 3314 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 94% | 55,941 psi | 86% | 3314 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 58,711 psi | 90% | 3314 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,595 psi | 89% | 3294 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,377 psi | 88% | 3222 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,290 psi | 88% | 3442 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 58% | 2156 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,608 psi | 86% | 3225 fps | 99.8% |
| IMR 4831 | <<locked>> | 82% | 56,463 psi | 87% | 3235 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,317 psi | 85% | 3228 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 90% | 57,914 psi | 89% | 3366 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,402 psi | 81% | 3271 fps | 98.6% |
| Lovex S070 | <<locked>> | 82% | 57,972 psi | 89% | 3264 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,682 psi | 89% | 3245 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,014 psi | 88% | 3284 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 53,359 psi | 82% | 3301 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 56,086 psi | 86% | 3327 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,030 psi | 89% | 3284 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,172 psi | 85% | 3320 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 57,000 psi | 88% | 3287 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,856 psi | 89% | 3310 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,580 psi | 59% | 2208 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 58,711 psi | 90% | 3432 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,204 psi | 90% | 3386 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 57,653 psi | 89% | 3278 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 56,492 psi | 87% | 3287 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 82% | 57,972 psi | 89% | 3264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,465 psi | 90% | 3212 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,101 psi | 86% | 3281 fps | 99.6% |
| Somchem S361 | <<locked>> | 84% | 55,506 psi | 85% | 3199 fps | 98.3% |
| Somchem S365 | <<locked>> | 82% | 55,593 psi | 86% | 3228 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,000 psi | 88% | 3258 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 56,913 psi | 88% | 3241 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 86% | 55,985 psi | 86% | 3258 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,521 psi | 85% | 3323 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 92% | 56,608 psi | 87% | 3314 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 58,349 psi | 90% | 3386 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,218 psi | 90% | 3376 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,898 psi | 88% | 3251 fps | 99.6% |
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% | 42,598 psi | 66% | 2959 fps | 99.1% |
| Accurate High Country | <<locked>> | 80% | 46,789 psi | 72% | 3159 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 47,703 psi | 73% | 3159 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 46,514 psi | 72% | 3104 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 41,959 psi | 65% | 3028 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 41,046 psi | 63% | 2999 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 32,764 psi | 50% | 2808 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,963 psi | 72% | 3107 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,432 psi | 82% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,528 psi | 72% | 3097 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,699 psi | 66% | 3035 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,278 psi | 64% | 2982 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,694 psi | 55% | 2890 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,050 psi | 72% | 3163 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 52,620 psi | 81% | 3291 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 52,895 psi | 81% | 3202 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 39,682 psi | 61% | 2963 fps | 95.9% |
| Bofors RP30 | <<locked>> | 86% | 41,234 psi | 63% | 3015 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,699 psi | 66% | 3035 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 84% | 39,001 psi | 60% | 2949 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 44,512 psi | 69% | 3035 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,772 psi | 67% | 3018 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,328 psi | 77% | 3110 fps | 100% |
| Hodgdon Retumbo | 70.5 gr | 82% | 37,434 psi | 58% | 2989 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,170 psi | 80% | 3163 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 52,866 psi | 81% | 3176 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,469 psi | 70% | 3028 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 43,555 psi | 67% | 3077 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 42,409 psi | 65% | 3058 fps | 96% |
| Lovex S070 | <<locked>> | 80% | 54,418 psi | 84% | 3202 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 36,666 psi | 56% | 2818 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 53,374 psi | 82% | 3222 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 34,751 psi | 53% | 2874 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 45,324 psi | 70% | 3117 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 54,302 psi | 84% | 3222 fps | 100% |
| Ramshot Grand | 70.8 gr | 80% | 40,625 psi | 63% | 3012 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 53,403 psi | 82% | 3222 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,622 psi | 56% | 2874 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1978 fps | 100% |
| ReloadSwiss RS 76 | 73.6 gr | 80% | 34,229 psi | 53% | 2881 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 46,122 psi | 71% | 3146 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 47,514 psi | 73% | 3084 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 46,122 psi | 71% | 3087 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 80% | 54,418 psi | 84% | 3202 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,795 psi | 84% | 3156 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,788 psi | 70% | 3081 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 48,573 psi | 75% | 3068 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 51,967 psi | 80% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,688 psi | 72% | 3064 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 80% | 40,640 psi | 63% | 2917 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 80% | 45,948 psi | 71% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,020 psi | 69% | 3104 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 43,033 psi | 66% | 3031 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 46,905 psi | 72% | 3159 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,537 psi | 61% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,960 psi | 66% | 2979 fps | 97.2% |
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 57 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 110gr | Hasler Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,442 fps; across all powders the maximum-charge window runs from 2,156 fps to 3,442 fps. ADI AR 2225 gives the best case fill at 100 %, and 57 of the 57 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 110.0 gr projectile in 0.264" calls for a 1:9.5 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, Ramshot Grand rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 110gr | Hasler 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.