Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 142gr | IBEX TRD bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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 2495 | <<locked>> | 82% | 57,363 psi | 90% | 3100 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,029 psi | 89% | 3140 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3186 fps | 98.9% |
| Accurate 4064 | <<locked>> | 84% | 57,493 psi | 90% | 3156 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,740 psi | 90% | 3251 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,072 psi | 88% | 3166 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 54,143 psi | 85% | 3212 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,172 psi | 86% | 3294 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,447 psi | 85% | 3212 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,174 psi | 90% | 3199 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,377 psi | 90% | 3219 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,261 psi | 90% | 3301 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,998 psi | 86% | 3271 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,072 psi | 89% | 3261 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3261 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,735 psi | 81% | 3205 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,339 psi | 71% | 3107 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,361 psi | 87% | 3346 fps | 99.8% |
| Bofors RP3 | <<locked>> | 84% | 55,071 psi | 86% | 3166 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3261 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 57,522 psi | 90% | 3189 fps | 98% |
| Hodgdon H380 | <<locked>> | 84% | 55,071 psi | 86% | 3169 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 90% | 55,579 psi | 87% | 3235 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 88% | 55,100 psi | 86% | 3186 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,404 psi | 85% | 3169 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,912 psi | 88% | 3212 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,637 psi | 87% | 3268 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 2024 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,521 psi | 89% | 3176 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,637 psi | 87% | 3150 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,607 psi | 86% | 3120 fps | 98% |
| IMR 4350 | <<locked>> | 92% | 54,737 psi | 86% | 3156 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,245 psi | 87% | 3156 fps | 98.1% |
| IMR 4831 | <<locked>> | 94% | 57,624 psi | 90% | 3235 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 55,390 psi | 87% | 3196 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,884 psi | 89% | 3133 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,188 psi | 88% | 3150 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,869 psi | 88% | 3159 fps | 99.1% |
| Lovex S070 | <<locked>> | 92% | 57,319 psi | 90% | 3202 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 3028 fps | 97.4% |
| Norma 201 | <<locked>> | 82% | 57,653 psi | 90% | 3166 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,695 psi | 89% | 3205 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,288 psi | 87% | 3205 fps | 96.5% |
| Norma MRP | <<locked>> | 98% | 54,230 psi | 85% | 3294 fps | 98.1% |
| Norma URP | <<locked>> | 92% | 55,796 psi | 87% | 3228 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 84% | 57,348 psi | 90% | 3228 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 54,317 psi | 85% | 3215 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 2073 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,795 psi | 86% | 3146 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,563 psi | 86% | 3268 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,101 psi | 89% | 3268 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,274 psi | 87% | 3287 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 82% | 55,085 psi | 86% | 3114 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,114 psi | 86% | 3159 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 56,478 psi | 89% | 3248 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 90% | 57,522 psi | 90% | 3189 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,869 psi | 88% | 3159 fps | 99.1% |
| Shooters World Precision | <<locked>> | 84% | 56,188 psi | 88% | 3150 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,319 psi | 90% | 3202 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,057 psi | 88% | 3212 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,000 psi | 89% | 3186 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,419 psi | 87% | 3038 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,593 psi | 87% | 3104 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,970 psi | 88% | 3241 fps | 97% |
| Somchem S355 | <<locked>> | 86% | 54,853 psi | 86% | 3153 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,042 psi | 86% | 3235 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,537 psi | 90% | 3228 fps | 98% |
| Vihtavuori N135 | <<locked>> | 82% | 55,013 psi | 86% | 3074 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,013 psi | 86% | 3081 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,941 psi | 88% | 3123 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,143 psi | 85% | 3163 fps | 99.6% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 3133 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 56,840 psi | 89% | 3130 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,116 psi | 90% | 3225 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 98% | 54,433 psi | 85% | 3235 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,334 psi | 90% | 3179 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,579 psi | 87% | 3235 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,137 psi | 74% | 3261 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,130 psi | 90% | 3196 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,421 psi | 90% | 3215 fps | 97% |
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 2495 | <<locked>> | 80% | 53,998 psi | 85% | 3051 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,343 psi | 79% | 3018 fps | 96.4% |
| Accurate 3100 | <<locked>> | 90% | 40,379 psi | 63% | 2890 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 51,068 psi | 80% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,044 psi | 61% | 2887 fps | 97% |
| ADI AR 2208 | <<locked>> | 80% | 46,862 psi | 73% | 2999 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 50,908 psi | 80% | 3150 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,430 psi | 81% | 3225 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 50,981 psi | 80% | 3146 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,805 psi | 75% | 3035 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,720 psi | 79% | 3104 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,347 psi | 59% | 2881 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,119 psi | 66% | 3022 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 50,386 psi | 79% | 3140 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 48,022 psi | 75% | 3136 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,994 psi | 47% | 2680 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 37,927 psi | 59% | 2920 fps | 95.2% |
| Alliant Reloder-26 | 75.8 gr | 86% | 36,622 psi | 57% | 2933 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,443 psi | 76% | 3048 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 48,022 psi | 75% | 3136 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 45,179 psi | 71% | 2953 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,660 psi | 76% | 3054 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 42,975 psi | 67% | 2982 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 48,791 psi | 76% | 3068 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,186 psi | 55% | 2776 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,460 psi | 82% | 3153 fps | 100% |
| Hodgdon Superformance | 76.4 gr | 84% | 45,121 psi | 71% | 3058 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,997 psi | 83% | 3117 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,298 psi | 77% | 3038 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,488 psi | 81% | 3061 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 45,687 psi | 72% | 2982 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,497 psi | 68% | 2920 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 37,333 psi | 59% | 2831 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 51,953 psi | 81% | 3136 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 53,650 psi | 84% | 3081 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,864 psi | 78% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,684 psi | 65% | 2881 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 42,453 psi | 67% | 2913 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 38,972 psi | 61% | 2858 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 54,346 psi | 85% | 3114 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,125 psi | 79% | 3087 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 51,808 psi | 81% | 3143 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 44,570 psi | 70% | 3094 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,305 psi | 60% | 2871 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 50,256 psi | 79% | 3107 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 39,639 psi | 62% | 2913 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 44% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,399 psi | 76% | 3028 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,541 psi | 70% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,464 psi | 60% | 2897 fps | 96.5% |
| ReloadSwiss RS 70 | 69.9 gr | 80% | 37,217 psi | 58% | 2890 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 51,953 psi | 81% | 3061 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,730 psi | 72% | 2989 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 94% | 49,647 psi | 78% | 3123 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 45,179 psi | 71% | 2953 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,684 psi | 65% | 2881 fps | 96.4% |
| Shooters World Precision | <<locked>> | 80% | 49,864 psi | 78% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 42,453 psi | 67% | 2913 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,296 psi | 73% | 3035 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,563 psi | 84% | 3130 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,470 psi | 73% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 43,439 psi | 68% | 2871 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 49,197 psi | 77% | 3117 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 45,890 psi | 72% | 2986 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 35,012 psi | 55% | 2831 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 44,730 psi | 70% | 2989 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 51,953 psi | 81% | 3028 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,808 psi | 81% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,729 psi | 69% | 2910 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 39,581 psi | 62% | 2871 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 46,702 psi | 73% | 3015 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 50,401 psi | 79% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,378 psi | 62% | 2874 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 33,228 psi | 52% | 2776 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,769 psi | 61% | 2835 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 43,134 psi | 68% | 2986 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,660 psi | 45% | 2713 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,664 psi | 84% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 50,256 psi | 79% | 3087 fps | 95.4% |
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 80 powders for .300 Weath. Mag. loaded with the .308 | 142gr | IBEX TRD. Alliant Reloder-26 delivers the highest muzzle velocity at 3,346 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,346 fps. Accurate 3100 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 142.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 Weath. Mag. with the .308 | 142gr | 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.