Load Specifications
Load data in caliber .300 Norma Mag. with .310 | 125gr | Speer HP TNT bullet and 90 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 Alliant Reloder-17.
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>> | 84% | 56,637 psi | 89% | 3323 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,621 psi | 86% | 3317 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3340 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 57,029 psi | 89% | 3383 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,259 psi | 85% | 3415 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 56,028 psi | 88% | 3412 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 57,334 psi | 90% | 3415 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 55,622 psi | 87% | 3451 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,608 psi | 89% | 3547 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,709 psi | 87% | 3448 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,418 psi | 85% | 3379 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,723 psi | 86% | 3399 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,984 psi | 86% | 3484 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,536 psi | 89% | 3517 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,969 psi | 86% | 3435 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 3363 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,888 psi | 67% | 3245 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3589 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,115 psi | 88% | 3419 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 55,303 psi | 87% | 3396 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 54,882 psi | 86% | 3363 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 86% | 55,898 psi | 88% | 3409 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 56,710 psi | 89% | 3471 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 90% | 56,333 psi | 88% | 3425 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,666 psi | 89% | 3425 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,317 psi | 87% | 3399 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,116 psi | 90% | 3458 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,479 psi | 90% | 3510 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 57% | 2201 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,653 psi | 90% | 3425 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,217 psi | 90% | 3406 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,623 psi | 89% | 3396 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,869 psi | 88% | 3366 fps | 97.9% |
| IMR 4350 | <<locked>> | 94% | 55,941 psi | 88% | 3396 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,507 psi | 89% | 3399 fps | 97.9% |
| IMR 4831 | <<locked>> | 94% | 54,839 psi | 86% | 3409 fps | 99.6% |
| IMR 4895 | <<locked>> | 84% | 56,159 psi | 88% | 3438 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,405 psi | 88% | 3379 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,679 psi | 86% | 3327 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 56,855 psi | 89% | 3392 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,579 psi | 89% | 3396 fps | 99% |
| Lovex S070 | <<locked>> | 92% | 54,404 psi | 85% | 3373 fps | 97.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,395 psi | 68% | 3156 fps | 96% |
| Norma 201 | <<locked>> | 82% | 54,534 psi | 85% | 3343 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,419 psi | 87% | 3350 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,638 psi | 90% | 3448 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,869 psi | 89% | 3451 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 55,579 psi | 87% | 3524 fps | 97.9% |
| Norma URP | <<locked>> | 94% | 56,681 psi | 89% | 3465 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 54,810 psi | 86% | 3406 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 55,666 psi | 87% | 3455 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 57% | 2247 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,811 psi | 87% | 3386 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,564 psi | 87% | 3478 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,927 psi | 88% | 3517 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,302 psi | 85% | 3435 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,898 psi | 89% | 3533 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 55,259 psi | 87% | 3346 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,361 psi | 87% | 3389 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 54,012 psi | 85% | 3415 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 90% | 54,882 psi | 86% | 3363 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,579 psi | 89% | 3396 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,405 psi | 88% | 3379 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,855 psi | 89% | 3392 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,404 psi | 85% | 3373 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,159 psi | 90% | 3451 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,537 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% | 55,347 psi | 87% | 3278 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,550 psi | 89% | 3278 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,565 psi | 89% | 3337 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3481 fps | 96.8% |
| Somchem S335 | <<locked>> | 82% | 55,143 psi | 86% | 3271 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,072 psi | 89% | 3392 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,448 psi | 87% | 3386 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,014 psi | 88% | 3468 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,781 psi | 86% | 3392 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 82% | 55,854 psi | 88% | 3261 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,419 psi | 87% | 3310 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,101 psi | 88% | 3323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,811 psi | 89% | 3360 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,201 psi | 87% | 3396 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 54,259 psi | 85% | 3310 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,404 psi | 85% | 3396 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3458 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,361 psi | 87% | 3363 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,898 psi | 89% | 3474 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,454 psi | 70% | 3402 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,650 psi | 86% | 3376 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3386 fps | 96.2% |
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 2495 | <<locked>> | 80% | 49,705 psi | 78% | 3212 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,718 psi | 75% | 3182 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 42,380 psi | 66% | 3133 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,021 psi | 74% | 3205 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,621 psi | 56% | 2999 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 52,576 psi | 82% | 3346 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 44,483 psi | 70% | 3159 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 96% | 52,025 psi | 82% | 3379 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,081 psi | 77% | 3396 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 52,185 psi | 82% | 3379 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,933 psi | 70% | 3192 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,080 psi | 75% | 3271 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 82% | 37,173 psi | 58% | 3077 fps | 95.9% |
| Alliant Reloder-17 | 76.1 gr | 80% | 39,523 psi | 62% | 3163 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,488 psi | 81% | 3369 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 33,098 psi | 52% | 2969 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 98% | 40,190 psi | 63% | 3173 fps | 95.5% |
| Alliant Reloder-26 | 87.7 gr | 90% | 39,001 psi | 61% | 3189 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,489 psi | 82% | 3350 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 45,107 psi | 71% | 3199 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 48,428 psi | 76% | 3232 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,585 psi | 71% | 3202 fps | 97.7% |
| 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% | 53,142 psi | 83% | 3360 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,314 psi | 51% | 2890 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,763 psi | 78% | 3327 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 45,963 psi | 72% | 3281 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 42% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,720 psi | 79% | 3301 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 53,447 psi | 84% | 3346 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,760 psi | 73% | 3205 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,269 psi | 77% | 3235 fps | 96.5% |
| IMR 4350 | <<locked>> | 88% | 46,180 psi | 72% | 3199 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,934 psi | 74% | 3205 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 36,709 psi | 58% | 3012 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 49,327 psi | 77% | 3307 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 52,837 psi | 83% | 3320 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,503 psi | 81% | 3264 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 47,021 psi | 74% | 3209 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 41,278 psi | 65% | 3077 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 44,875 psi | 70% | 3176 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 40,495 psi | 63% | 3087 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,343 psi | 80% | 3287 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,938 psi | 81% | 3291 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,456 psi | 74% | 3258 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 53,185 psi | 83% | 3379 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 44,947 psi | 70% | 3301 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 38,029 psi | 60% | 3064 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,761 psi | 75% | 3274 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 42,337 psi | 66% | 3179 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 43% | 2018 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,803 psi | 72% | 3186 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,750 psi | 81% | 3406 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,003 psi | 66% | 3241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 37,956 psi | 59% | 3081 fps | 95.5% |
| ReloadSwiss RS 70 | 81.1 gr | 84% | 39,813 psi | 62% | 3156 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,689 psi | 76% | 3228 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 42,511 psi | 67% | 3136 fps | 99% |
| Rottweil R 905 | <<locked>> | 96% | 50,444 psi | 79% | 3350 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 48,428 psi | 76% | 3232 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 41,278 psi | 65% | 3077 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,837 psi | 83% | 3320 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,021 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% | 43,584 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% | 51,010 psi | 80% | 3304 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,025 psi | 82% | 3225 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,888 psi | 69% | 3061 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,456 psi | 73% | 3143 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,980 psi | 78% | 3340 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,924 psi | 81% | 3222 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,388 psi | 84% | 3330 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 42,873 psi | 67% | 3136 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 31,981 psi | 50% | 2940 fps | 97.2% |
| Somchem S385 | <<locked>> | 94% | 47,964 psi | 75% | 3258 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,518 psi | 82% | 3209 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,820 psi | 77% | 3202 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,298 psi | 77% | 3209 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,988 psi | 64% | 3061 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 36,912 psi | 58% | 3002 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 47,616 psi | 75% | 3192 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,405 psi | 57% | 2999 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 34,243 psi | 54% | 2995 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,376 psi | 57% | 2966 fps | 97.8% |
| Winchester 760 | <<locked>> | 86% | 46,354 psi | 73% | 3268 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 31,502 psi | 49% | 2999 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,068 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 90 powders for .300 Norma Mag. loaded with the .310 | 125gr | Speer HP TNT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,589 fps; across all powders the maximum-charge window runs from 2,201 fps to 3,589 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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. 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-26, Alliant Reloder-17 rank at the top here: for .300 Norma Mag. with the .310 | 125gr | Speer HP TNT 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.