Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 110gr | IBEX TRD bullet and 47 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 ReloadSwiss RS 80.
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>> | 86% | 56,855 psi | 88% | 3222 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 55,114 psi | 85% | 3304 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 84% | 56,695 psi | 87% | 3294 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 86% | 55,317 psi | 85% | 3304 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 96% | 58,204 psi | 90% | 3343 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 98% | 57,334 psi | 88% | 3373 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,478 psi | 87% | 3284 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,188 psi | 86% | 3304 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,928 psi | 89% | 3278 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 58,378 psi | 90% | 3350 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,056 psi | 85% | 3304 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,956 psi | 88% | 3369 fps | 96.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,725 psi | 89% | 3366 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,622 psi | 86% | 3248 fps | 96.6% |
| Bofors RP15 | <<locked>> | 88% | 55,637 psi | 86% | 3297 fps | 99.5% |
| Bofors RP30 | <<locked>> | 94% | 58,465 psi | 90% | 3360 fps | 99.5% |
| Bofors RP5 | <<locked>> | 86% | 56,188 psi | 86% | 3304 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 92% | 55,724 psi | 86% | 3304 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 86% | 58,160 psi | 90% | 3297 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,072 psi | 88% | 3278 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,130 psi | 88% | 3209 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,334 psi | 88% | 3438 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,956 psi | 58% | 2162 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,769 psi | 90% | 3271 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 58,247 psi | 90% | 3274 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 88% | 57,566 psi | 89% | 3350 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,753 psi | 87% | 3346 fps | 99.3% |
| Lovex S071 | <<locked>> | 92% | 58,552 psi | 90% | 3248 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 58,233 psi | 90% | 3376 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,304 psi | 87% | 3323 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,940 psi | 85% | 3310 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 90% | 57,986 psi | 89% | 3304 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,059 psi | 60% | 2211 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 58,639 psi | 90% | 3428 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 58,537 psi | 90% | 3386 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 84% | 57,072 psi | 88% | 3258 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 84% | 56,376 psi | 87% | 3278 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,014 psi | 86% | 3274 fps | 99.6% |
| Somchem S361 | <<locked>> | 82% | 55,100 psi | 85% | 3182 fps | 98.3% |
| Somchem S385 | <<locked>> | 84% | 56,927 psi | 88% | 3245 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 88% | 56,782 psi | 87% | 3232 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 84% | 56,594 psi | 87% | 3258 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,579 psi | 86% | 3317 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 90% | 57,232 psi | 88% | 3317 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 94% | 58,682 psi | 90% | 3386 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 58,581 psi | 90% | 3376 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,666 psi | 87% | 3238 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% | 46,905 psi | 72% | 3041 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 48,022 psi | 74% | 3163 fps | 96.2% |
| ADI AR 2209 | <<locked>> | 80% | 49,676 psi | 76% | 3163 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 45,223 psi | 70% | 3097 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 84% | 39,160 psi | 60% | 2943 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 32,024 psi | 49% | 2779 fps | 95% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,705 psi | 76% | 3156 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,267 psi | 71% | 3107 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,005 psi | 69% | 3051 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,204 psi | 60% | 2976 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,387 psi | 79% | 3241 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,142 psi | 82% | 3294 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 53,606 psi | 83% | 3291 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 52,272 psi | 80% | 3182 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 43,250 psi | 67% | 3038 fps | 97.2% |
| Bofors RP30 | <<locked>> | 82% | 39,610 psi | 61% | 2966 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 46,267 psi | 71% | 3107 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 82% | 39,682 psi | 61% | 2959 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 47,703 psi | 73% | 3097 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,934 psi | 72% | 3081 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,751 psi | 83% | 3156 fps | 100% |
| Hodgdon Retumbo | 69 gr | 80% | 38,464 psi | 59% | 3015 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,543 psi | 44% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 55,129 psi | 85% | 3209 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,298 psi | 74% | 3084 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 43,961 psi | 68% | 3077 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 41,031 psi | 63% | 3018 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 40,886 psi | 63% | 2910 fps | 98.8% |
| Norma 217 | <<locked>> | 84% | 34,287 psi | 53% | 2858 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 49,168 psi | 76% | 3189 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 44,353 psi | 68% | 3094 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 80% | 40,480 psi | 62% | 2963 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,428 psi | 45% | 1985 fps | 100% |
| ReloadSwiss RS 76 | 73.8 gr | 80% | 38,000 psi | 58% | 2989 fps | 97.7% |
| ReloadSwiss RS 80 | 80 gr | 86% | 43,758 psi | 67% | 3087 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 50,531 psi | 78% | 3136 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 49,647 psi | 76% | 3150 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,284 psi | 76% | 3146 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 51,735 psi | 80% | 3120 fps | 97.7% |
| Somchem S385 | <<locked>> | 80% | 50,343 psi | 77% | 3127 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 44,048 psi | 68% | 2986 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 50,111 psi | 77% | 3143 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,573 psi | 75% | 3179 fps | 97% |
| Vihtavuori N565 | <<locked>> | 80% | 41,437 psi | 64% | 2989 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 47,819 psi | 74% | 3173 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,976 psi | 68% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,383 psi | 71% | 3045 fps | 98.2% |
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 47 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 110gr | IBEX TRD. Hodgdon Retumbo delivers the highest muzzle velocity at 3,438 fps; across all powders the maximum-charge window runs from 2,162 fps to 3,438 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 47 of the 47 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. Alliant Reloder-50, 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, ReloadSwiss RS 80 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 110gr | IBEX TRD 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.