Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 125gr | Hornady SST bullet and 91 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-16 and Alliant Reloder-26.
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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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>> | 84% | 56,550 psi | 89% | 3323 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,578 psi | 86% | 3314 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 3337 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 56,985 psi | 89% | 3379 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,230 psi | 85% | 3415 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 55,767 psi | 87% | 3406 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 57,116 psi | 90% | 3409 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 55,434 psi | 87% | 3448 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,565 psi | 89% | 3547 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,506 psi | 87% | 3445 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,506 psi | 87% | 3445 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,404 psi | 85% | 3379 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,679 psi | 86% | 3399 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,926 psi | 86% | 3484 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,521 psi | 89% | 3517 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,723 psi | 86% | 3432 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,052 psi | 77% | 3363 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,714 psi | 67% | 3241 fps | 96.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 3583 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,086 psi | 88% | 3419 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 55,274 psi | 87% | 3396 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 54,824 psi | 86% | 3363 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 86% | 55,869 psi | 88% | 3409 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 56,652 psi | 89% | 3471 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 90% | 56,347 psi | 88% | 3425 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,420 psi | 88% | 3419 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,303 psi | 87% | 3399 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,884 psi | 89% | 3455 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,290 psi | 90% | 3507 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 56% | 2198 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,638 psi | 90% | 3422 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,913 psi | 89% | 3402 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,608 psi | 89% | 3396 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,869 psi | 88% | 3363 fps | 97.8% |
| IMR 4350 | <<locked>> | 94% | 55,753 psi | 87% | 3389 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,478 psi | 89% | 3399 fps | 97.9% |
| IMR 4831 | <<locked>> | 94% | 54,621 psi | 86% | 3402 fps | 99.5% |
| IMR 4895 | <<locked>> | 84% | 56,144 psi | 88% | 3435 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,405 psi | 88% | 3379 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,636 psi | 86% | 3323 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 56,652 psi | 89% | 3386 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,565 psi | 89% | 3392 fps | 98.9% |
| Lovex S070 | <<locked>> | 92% | 54,389 psi | 85% | 3373 fps | 97.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,221 psi | 68% | 3153 fps | 95.9% |
| Norma 201 | <<locked>> | 82% | 54,520 psi | 85% | 3343 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,216 psi | 87% | 3346 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,566 psi | 90% | 3448 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,869 psi | 89% | 3448 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3527 fps | 97.9% |
| Norma URP | <<locked>> | 94% | 56,623 psi | 89% | 3465 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 54,737 psi | 86% | 3406 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 55,622 psi | 87% | 3455 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 57% | 2247 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,782 psi | 87% | 3383 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,521 psi | 87% | 3478 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,898 psi | 88% | 3514 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,259 psi | 85% | 3432 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,898 psi | 89% | 3533 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 55,187 psi | 86% | 3346 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,288 psi | 87% | 3386 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3481 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 90% | 54,824 psi | 86% | 3363 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,565 psi | 89% | 3392 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,405 psi | 88% | 3379 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,652 psi | 89% | 3386 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,389 psi | 85% | 3373 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,145 psi | 90% | 3451 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,305 psi | 90% | 3406 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,520 psi | 85% | 3369 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,332 psi | 87% | 3278 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,318 psi | 88% | 3274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,536 psi | 89% | 3337 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3474 fps | 96.8% |
| Somchem S335 | <<locked>> | 82% | 55,071 psi | 86% | 3271 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,087 psi | 89% | 3392 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,216 psi | 87% | 3383 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,753 psi | 87% | 3465 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,752 psi | 86% | 3392 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 82% | 55,825 psi | 87% | 3261 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,361 psi | 87% | 3310 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,869 psi | 88% | 3323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,797 psi | 89% | 3360 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,143 psi | 86% | 3396 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 54,244 psi | 85% | 3310 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,389 psi | 85% | 3396 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3458 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,114 psi | 86% | 3360 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,840 psi | 89% | 3474 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,425 psi | 70% | 3402 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,650 psi | 86% | 3376 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 3383 fps | 96.1% |
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% | 49,690 psi | 78% | 3212 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,703 psi | 75% | 3179 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 42,380 psi | 66% | 3133 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 46,992 psi | 74% | 3205 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 38,014 psi | 60% | 3064 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 52,315 psi | 82% | 3343 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 44,454 psi | 70% | 3159 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 96% | 51,837 psi | 81% | 3379 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,066 psi | 77% | 3396 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,938 psi | 81% | 3373 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,938 psi | 81% | 3373 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,715 psi | 70% | 3186 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,877 psi | 75% | 3268 fps | 99% |
| Alliant Reloder-16 | 72.3 gr | 82% | 37,101 psi | 58% | 3074 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,465 psi | 62% | 3159 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,271 psi | 80% | 3363 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,909 psi | 52% | 2963 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 40,059 psi | 63% | 3169 fps | 95.4% |
| Alliant Reloder-26 | 87.6 gr | 90% | 39,001 psi | 61% | 3189 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,286 psi | 82% | 3350 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 45,092 psi | 71% | 3199 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 48,196 psi | 76% | 3228 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,571 psi | 71% | 3202 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 46,180 psi | 72% | 3261 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 49,385 psi | 77% | 3291 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,939 psi | 83% | 3356 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,285 psi | 51% | 2890 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,719 psi | 78% | 3323 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 45,759 psi | 72% | 3274 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 42% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,647 psi | 79% | 3297 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 53,374 psi | 84% | 3346 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,731 psi | 73% | 3205 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,037 psi | 77% | 3232 fps | 96.4% |
| IMR 4350 | <<locked>> | 88% | 45,992 psi | 72% | 3196 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,717 psi | 73% | 3202 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 36,666 psi | 57% | 3012 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 49,124 psi | 77% | 3304 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 52,591 psi | 82% | 3317 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,488 psi | 81% | 3264 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 46,992 psi | 74% | 3209 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 41,234 psi | 65% | 3074 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 44,875 psi | 70% | 3176 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 40,451 psi | 63% | 3087 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,285 psi | 80% | 3287 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,721 psi | 81% | 3287 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,253 psi | 74% | 3251 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 52,997 psi | 83% | 3376 fps | 95.4% |
| Norma MRP | <<locked>> | 94% | 44,773 psi | 70% | 3297 fps | 95% |
| Norma URP | <<locked>> | 82% | 37,840 psi | 59% | 3061 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,747 psi | 75% | 3271 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 42,308 psi | 66% | 3176 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 43% | 2018 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,600 psi | 71% | 3179 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,692 psi | 81% | 3406 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,959 psi | 66% | 3238 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 37,942 psi | 59% | 3081 fps | 95.5% |
| ReloadSwiss RS 70 | 81 gr | 84% | 39,784 psi | 62% | 3156 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,660 psi | 76% | 3228 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 42,308 psi | 66% | 3133 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 96% | 50,430 psi | 79% | 3346 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 48,196 psi | 76% | 3228 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 41,234 psi | 65% | 3074 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,591 psi | 82% | 3317 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,992 psi | 74% | 3209 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 44,875 psi | 70% | 3176 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,555 psi | 68% | 3189 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,534 psi | 84% | 3337 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,937 psi | 80% | 3304 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,996 psi | 81% | 3222 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,830 psi | 69% | 3058 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,296 psi | 73% | 3140 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,966 psi | 78% | 3340 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 51,895 psi | 81% | 3219 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,142 psi | 83% | 3323 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 42,844 psi | 67% | 3136 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 31,807 psi | 50% | 2933 fps | 97.1% |
| Somchem S385 | <<locked>> | 94% | 47,776 psi | 75% | 3255 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,475 psi | 82% | 3209 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,762 psi | 76% | 3202 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,095 psi | 77% | 3205 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,770 psi | 64% | 3054 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 36,738 psi | 58% | 2999 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,601 psi | 75% | 3192 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 39,015 psi | 61% | 3068 fps | 96% |
| Vihtavuori N555 | <<locked>> | 86% | 34,040 psi | 53% | 2989 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,245 psi | 57% | 2966 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 46,340 psi | 73% | 3264 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 31,386 psi | 49% | 2995 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,053 psi | 80% | 3310 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,372 psi | 81% | 3314 fps | 95.2% |
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 91 powders for .300 Norma Mag. loaded with the .308 | 125gr | Hornady SST. Alliant Reloder-26 delivers the highest muzzle velocity at 3,583 fps; across all powders the maximum-charge window runs from 2,198 fps to 3,583 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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-16, Alliant Reloder-26 rank at the top here: for .300 Norma Mag. with the .308 | 125gr | Hornady SST 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.