Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 100gr | Norma HP bullet and 67 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 Norma MRP.
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% | 56,391 psi | 87% | 3343 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,623 psi | 87% | 3376 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 58,073 psi | 89% | 3501 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 88% | 55,172 psi | 85% | 3432 fps | 97% |
| ADI AR 2209 | <<locked>> | 88% | 57,580 psi | 89% | 3438 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 90% | 55,912 psi | 86% | 3442 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,436 psi | 90% | 3471 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,968 psi | 82% | 3415 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,537 psi | 89% | 3442 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,334 psi | 88% | 3428 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,318 psi | 87% | 3435 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,015 psi | 89% | 3412 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,262 psi | 90% | 3481 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,868 psi | 84% | 3435 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,043 psi | 88% | 3389 fps | 95.9% |
| Bofors RP15 | <<locked>> | 92% | 55,506 psi | 85% | 3419 fps | 98.9% |
| Bofors RP30 | <<locked>> | 98% | 58,218 psi | 90% | 3481 fps | 99% |
| Bofors RP5 | <<locked>> | 90% | 56,318 psi | 87% | 3435 fps | 99.1% |
| Bofors RP7 | <<locked>> | 82% | 57,827 psi | 89% | 3379 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 96% | 55,999 psi | 86% | 3432 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 57,943 psi | 89% | 3435 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 55,390 psi | 85% | 3369 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,088 psi | 89% | 3419 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,783 psi | 89% | 3356 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,130 psi | 88% | 3563 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 58% | 2251 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,347 psi | 87% | 3356 fps | 99.6% |
| IMR 4831 | <<locked>> | 84% | 56,826 psi | 87% | 3366 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,811 psi | 86% | 3350 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 92% | 58,073 psi | 89% | 3484 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,428 psi | 75% | 3301 fps | 96.9% |
| Lovex S065 | <<locked>> | 82% | 56,652 psi | 87% | 3343 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,566 psi | 90% | 3399 fps | 99.9% |
| Lovex S071 | <<locked>> | 96% | 57,740 psi | 89% | 3363 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,827 psi | 89% | 3419 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 49,240 psi | 76% | 3333 fps | 98.9% |
| Norma MRP | <<locked>> | 88% | 56,347 psi | 87% | 3455 fps | 99.8% |
| Norma URP | <<locked>> | 84% | 58,479 psi | 90% | 3415 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,274 psi | 85% | 3438 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 84% | 57,725 psi | 89% | 3422 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,262 psi | 90% | 3435 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 59% | 2300 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,985 psi | 88% | 3399 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,448 psi | 85% | 3422 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,552 psi | 90% | 3553 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,131 psi | 89% | 3497 fps | 97.9% |
| Rottweil R 904 | <<locked>> | 88% | 58,363 psi | 90% | 3409 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 88% | 56,942 psi | 88% | 3415 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 82% | 57,827 psi | 89% | 3379 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,652 psi | 87% | 3343 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,566 psi | 90% | 3399 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,535 psi | 85% | 3284 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,521 psi | 87% | 3409 fps | 99.1% |
| Somchem S361 | <<locked>> | 86% | 56,449 psi | 87% | 3327 fps | 97.8% |
| Somchem S365 | <<locked>> | 84% | 55,970 psi | 86% | 3360 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,406 psi | 88% | 3383 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 82% | 56,362 psi | 87% | 3350 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,305 psi | 88% | 3360 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 82% | 55,622 psi | 86% | 3346 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,188 psi | 86% | 3386 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,883 psi | 86% | 3445 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 94% | 56,797 psi | 87% | 3432 fps | 98.2% |
| Vihtavuori N568 | <<locked>> | 98% | 58,450 psi | 90% | 3504 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,144 psi | 86% | 3291 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,175 psi | 90% | 3438 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,769 psi | 89% | 3501 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,363 psi | 88% | 3376 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% | 39,929 psi | 61% | 3009 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 52,852 psi | 81% | 3310 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,685 psi | 67% | 3196 fps | 95% |
| Accurate MAGPRO | <<locked>> | 84% | 47,863 psi | 74% | 3278 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 43,859 psi | 68% | 3153 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 45,252 psi | 70% | 3215 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 44,121 psi | 68% | 3176 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 35,070 psi | 54% | 2972 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,401 psi | 78% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,903 psi | 68% | 3150 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,827 psi | 61% | 3074 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,566 psi | 59% | 3031 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,286 psi | 51% | 2920 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,395 psi | 67% | 3202 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,476 psi | 82% | 3320 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 42,453 psi | 65% | 3136 fps | 95.8% |
| Bofors RP30 | <<locked>> | 90% | 44,019 psi | 68% | 3189 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 39,827 psi | 61% | 3074 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 54,201 psi | 83% | 3314 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 42,134 psi | 65% | 3133 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 54,288 psi | 84% | 3366 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 84% | 48,211 psi | 74% | 3225 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 47,297 psi | 73% | 3205 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,326 psi | 73% | 3173 fps | 100% |
| Hodgdon Retumbo | 74.3 gr | 86% | 40,016 psi | 62% | 3169 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 43% | 2021 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,559 psi | 76% | 3228 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 49,806 psi | 77% | 3238 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 46,050 psi | 71% | 3150 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 47,036 psi | 72% | 3264 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 45,092 psi | 69% | 3225 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 53,142 psi | 82% | 3281 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 51,532 psi | 79% | 3268 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 34,214 psi | 53% | 2854 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 50,256 psi | 77% | 3274 fps | 97.9% |
| Norma 217 | <<locked>> | 92% | 36,854 psi | 57% | 3038 fps | 95% |
| Norma MRP | 71.8 gr | 80% | 42,279 psi | 65% | 3159 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 51,213 psi | 79% | 3291 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 43,845 psi | 67% | 3199 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 50,270 psi | 77% | 3281 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 39,523 psi | 61% | 3051 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 44% | 2064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,127 psi | 82% | 3330 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,561 psi | 79% | 3350 fps | 100% |
| ReloadSwiss RS 76 | 77.7 gr | 84% | 36,912 psi | 57% | 3061 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 49,763 psi | 77% | 3333 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 44,860 psi | 69% | 3133 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,424 psi | 67% | 3136 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 54,201 psi | 83% | 3314 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,142 psi | 82% | 3281 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 51,532 psi | 79% | 3268 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,040 psi | 80% | 3219 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,091 psi | 66% | 3130 fps | 96.3% |
| Somchem S361 | <<locked>> | 80% | 46,021 psi | 71% | 3120 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 48,791 psi | 75% | 3238 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,859 psi | 68% | 3110 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 80% | 52,765 psi | 81% | 3287 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,218 psi | 59% | 2963 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 52,170 psi | 80% | 3284 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,917 psi | 66% | 3127 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 48,660 psi | 75% | 3301 fps | 96% |
| Vihtavuori N565 | <<locked>> | 88% | 46,079 psi | 71% | 3212 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 94% | 50,488 psi | 78% | 3346 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,257 psi | 80% | 3228 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,288 psi | 84% | 3366 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,839 psi | 55% | 3058 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,248 psi | 62% | 3018 fps | 95.3% |
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 67 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 100gr | Norma HP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,563 fps; across all powders the maximum-charge window runs from 2,251 fps to 3,563 fps. ADI AR 2217 gives the best case fill at 100 %, and 67 of the 67 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 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Hodgdon TrailBoss 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, Norma MRP rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 100gr | Norma HP 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.