Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 110gr | Lehigh Defense Controlled Chaos 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% | 55,782 psi | 86% | 3212 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,926 psi | 85% | 3307 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 86% | 57,000 psi | 88% | 3307 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 88% | 55,593 psi | 86% | 3317 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 58,320 psi | 90% | 3353 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,145 psi | 88% | 3376 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,203 psi | 88% | 3304 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,101 psi | 88% | 3307 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,579 psi | 87% | 3294 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,072 psi | 86% | 3314 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,812 psi | 89% | 3284 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,102 psi | 89% | 3353 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 58,769 psi | 90% | 3373 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,666 psi | 87% | 3366 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,217 psi | 87% | 3264 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 55,274 psi | 85% | 3294 fps | 99.4% |
| Bofors RP30 | <<locked>> | 96% | 58,073 psi | 89% | 3360 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 56,072 psi | 86% | 3314 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 94% | 55,883 psi | 86% | 3314 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 58,668 psi | 90% | 3314 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,508 psi | 89% | 3294 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,305 psi | 88% | 3222 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,217 psi | 88% | 3442 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,637 psi | 58% | 2159 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,535 psi | 85% | 3222 fps | 99.8% |
| IMR 4831 | <<locked>> | 82% | 56,376 psi | 87% | 3235 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,697 psi | 90% | 3287 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 57,812 psi | 89% | 3363 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,141 psi | 80% | 3268 fps | 98.6% |
| Lovex S070 | <<locked>> | 82% | 57,914 psi | 89% | 3264 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,580 psi | 89% | 3241 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,956 psi | 88% | 3287 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 53,287 psi | 82% | 3301 fps | 99.8% |
| Norma MRP | <<locked>> | 86% | 56,043 psi | 86% | 3327 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,943 psi | 89% | 3281 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,071 psi | 85% | 3317 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 56,927 psi | 88% | 3284 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,798 psi | 89% | 3307 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,479 psi | 59% | 2205 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 58,653 psi | 90% | 3432 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,928 psi | 89% | 3383 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 57,609 psi | 89% | 3278 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 56,449 psi | 87% | 3287 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 82% | 57,914 psi | 89% | 3264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,392 psi | 90% | 3215 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,043 psi | 86% | 3281 fps | 99.5% |
| Somchem S361 | <<locked>> | 84% | 55,463 psi | 85% | 3199 fps | 98.3% |
| Somchem S365 | <<locked>> | 82% | 55,535 psi | 85% | 3225 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,724 psi | 87% | 3255 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 56,884 psi | 88% | 3241 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 58,624 psi | 90% | 3271 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 55,869 psi | 86% | 3255 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,477 psi | 85% | 3323 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 92% | 56,579 psi | 87% | 3314 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 58,334 psi | 90% | 3386 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,160 psi | 90% | 3373 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,811 psi | 87% | 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% | 42,540 psi | 65% | 2959 fps | 99% |
| Accurate MAGPRO | <<locked>> | 82% | 47,442 psi | 73% | 3156 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 46,456 psi | 71% | 3100 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 41,901 psi | 64% | 3028 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 88% | 41,002 psi | 63% | 2999 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 32,721 psi | 50% | 2805 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,905 psi | 72% | 3104 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,345 psi | 82% | 3241 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,470 psi | 72% | 3097 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,641 psi | 66% | 3035 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,205 psi | 63% | 2982 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,592 psi | 55% | 2887 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,789 psi | 72% | 3156 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 52,373 psi | 81% | 3284 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 52,663 psi | 81% | 3199 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 39,624 psi | 61% | 2959 fps | 95.9% |
| Bofors RP30 | <<locked>> | 86% | 41,017 psi | 63% | 3009 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 42,641 psi | 66% | 3035 fps | 97% |
| Hodgdon H1000 | <<locked>> | 84% | 38,957 psi | 60% | 2949 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 44,425 psi | 68% | 3031 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,729 psi | 67% | 3015 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,256 psi | 77% | 3107 fps | 100% |
| Hodgdon Retumbo | 70.4 gr | 82% | 37,376 psi | 58% | 2989 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 43% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,069 psi | 80% | 3163 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 52,794 psi | 81% | 3173 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,397 psi | 70% | 3025 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 43,497 psi | 67% | 3074 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 94% | 42,366 psi | 65% | 3054 fps | 95.9% |
| Lovex S070 | <<locked>> | 80% | 54,317 psi | 84% | 3199 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 36,593 psi | 56% | 2815 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 53,098 psi | 82% | 3215 fps | 99% |
| Norma 217 | <<locked>> | 88% | 34,693 psi | 53% | 2874 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 45,252 psi | 70% | 3114 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 54,230 psi | 83% | 3222 fps | 100% |
| Ramshot Grand | 70.7 gr | 80% | 40,567 psi | 62% | 3012 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 53,156 psi | 82% | 3219 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,550 psi | 56% | 2871 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,964 psi | 45% | 1982 fps | 100% |
| ReloadSwiss RS 76 | 73.5 gr | 80% | 34,185 psi | 53% | 2881 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 46,050 psi | 71% | 3143 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 47,268 psi | 73% | 3077 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 46,064 psi | 71% | 3084 fps | 98% |
| Shooters World SW4350 | <<locked>> | 80% | 54,317 psi | 84% | 3199 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,737 psi | 84% | 3153 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,716 psi | 70% | 3077 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 48,515 psi | 75% | 3064 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 51,851 psi | 80% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,630 psi | 72% | 3064 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 80% | 40,582 psi | 62% | 2917 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 80% | 54,984 psi | 85% | 3212 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,876 psi | 71% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,947 psi | 69% | 3107 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 42,946 psi | 66% | 3035 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 46,876 psi | 72% | 3159 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,305 psi | 60% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,917 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 | Lehigh Defense Controlled Chaos. Hodgdon Retumbo delivers the highest muzzle velocity at 3,442 fps; across all powders the maximum-charge window runs from 2,159 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 1:9.0 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, Ramshot Grand rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 110gr | Lehigh Defense Controlled Chaos 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.