Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 139gr | Prvi Partizan FMJ bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Hodgdon H414.
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 2700 | <<locked>> | 82% | 56,115 psi | 88% | 3219 fps | 98.3% |
| Accurate 3100 | <<locked>> | 98% | 55,695 psi | 87% | 3268 fps | 99.4% |
| Accurate 4064 | <<locked>> | 82% | 55,782 psi | 87% | 3215 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,217 psi | 90% | 3327 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 55,390 psi | 87% | 3245 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,476 psi | 85% | 3307 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 98% | 55,970 psi | 88% | 3363 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,405 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,681 psi | 89% | 3294 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,114 psi | 85% | 3327 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,463 psi | 87% | 3350 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,537 psi | 90% | 3356 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,448 psi | 87% | 3356 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3346 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 3261 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,956 psi | 89% | 3438 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,389 psi | 85% | 3333 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 57,653 psi | 90% | 3291 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,448 psi | 87% | 3356 fps | 97.7% |
| Bofors RP7 | <<locked>> | 88% | 56,623 psi | 89% | 3268 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 54,085 psi | 85% | 3241 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 88% | 55,477 psi | 87% | 3317 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 86% | 54,897 psi | 86% | 3274 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,650 psi | 86% | 3248 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,659 psi | 75% | 3294 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 88% | 56,072 psi | 88% | 3350 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 2113 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,810 psi | 86% | 3225 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,246 psi | 90% | 3261 fps | 99% |
| IMR 4350 | <<locked>> | 90% | 54,563 psi | 86% | 3245 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,694 psi | 86% | 3235 fps | 98.6% |
| IMR 4831 | <<locked>> | 92% | 57,522 psi | 90% | 3314 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,435 psi | 90% | 3291 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,319 psi | 90% | 3399 fps | 96.8% |
| Lovex S062 | <<locked>> | 82% | 55,216 psi | 87% | 3222 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,172 psi | 86% | 3238 fps | 99.5% |
| Lovex S070 | <<locked>> | 90% | 56,637 psi | 89% | 3284 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,458 psi | 78% | 3156 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 55,999 psi | 88% | 3278 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,492 psi | 87% | 3297 fps | 97.4% |
| Norma MRP | <<locked>> | 96% | 55,158 psi | 86% | 3383 fps | 98.8% |
| Norma URP | <<locked>> | 90% | 55,666 psi | 87% | 3307 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 57,101 psi | 89% | 3304 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,027 psi | 85% | 3346 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,694 psi | 86% | 3304 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3278 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 58% | 2162 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,682 psi | 90% | 3287 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,940 psi | 86% | 3343 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,435 psi | 90% | 3350 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,666 psi | 87% | 3376 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,153 psi | 75% | 3291 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 57,000 psi | 89% | 3235 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,725 psi | 90% | 3287 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,912 psi | 88% | 3274 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 96% | 57,058 psi | 89% | 3343 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 56,623 psi | 89% | 3268 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,172 psi | 86% | 3238 fps | 99.5% |
| Shooters World Precision | <<locked>> | 82% | 55,216 psi | 87% | 3222 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,637 psi | 89% | 3284 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,695 psi | 87% | 3287 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,650 psi | 86% | 3107 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,607 psi | 86% | 3182 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,579 psi | 89% | 3337 fps | 97.9% |
| Somchem S355 | <<locked>> | 86% | 57,537 psi | 90% | 3281 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 55,521 psi | 87% | 3314 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,653 psi | 90% | 3314 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 57,493 psi | 90% | 3189 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,653 psi | 90% | 3205 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,245 psi | 87% | 3192 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,696 psi | 90% | 3301 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3287 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 55,956 psi | 88% | 3196 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,058 psi | 89% | 3307 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 54,940 psi | 86% | 3317 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,638 psi | 90% | 3261 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,666 psi | 87% | 3320 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,663 psi | 83% | 3415 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,041 psi | 85% | 3241 fps | 97.3% |
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 2700 | <<locked>> | 80% | 52,402 psi | 82% | 3153 fps | 97.7% |
| Accurate 3100 | <<locked>> | 86% | 36,782 psi | 58% | 2877 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 52,373 psi | 82% | 3156 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,451 psi | 63% | 2995 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 48,936 psi | 77% | 3123 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 47,645 psi | 75% | 3173 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 52,243 psi | 82% | 3287 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,792 psi | 78% | 3153 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,098 psi | 83% | 3232 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,885 psi | 61% | 3005 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,614 psi | 70% | 3150 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 47,297 psi | 74% | 3159 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,063 psi | 71% | 3146 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,805 psi | 45% | 2713 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 37,318 psi | 58% | 2986 fps | 96.1% |
| Alliant Reloder-26 | 82.4 gr | 82% | 33,446 psi | 52% | 2907 fps | 95% |
| Bofors RP15 | <<locked>> | 96% | 47,601 psi | 75% | 3199 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,386 psi | 79% | 3166 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,063 psi | 71% | 3146 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,947 psi | 69% | 3015 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 50,604 psi | 79% | 3179 fps | 99.4% |
| Hodgdon H414 | 76.7 gr | 80% | 42,250 psi | 66% | 3048 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 45,049 psi | 71% | 3074 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,637 psi | 57% | 2884 fps | 98.5% |
| Hodgdon Retumbo | <<locked>> | 98% | 44,527 psi | 70% | 3215 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 41,452 psi | 65% | 3054 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 43% | 1893 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,430 psi | 81% | 3166 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,679 psi | 84% | 3199 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 42,148 psi | 66% | 2989 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,382 psi | 71% | 3051 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 38,682 psi | 61% | 2940 fps | 97.6% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,824 psi | 84% | 3225 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 53,461 psi | 84% | 3327 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 51,880 psi | 81% | 3166 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,960 psi | 67% | 2995 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 41,234 psi | 65% | 2969 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 38,029 psi | 60% | 2910 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,431 psi | 82% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 86% | 48,269 psi | 76% | 3159 fps | 95.7% |
| Norma MRP | 85.8 gr | 88% | 41,321 psi | 65% | 3094 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,987 psi | 63% | 2989 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 53,287 psi | 84% | 3241 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 50,256 psi | 79% | 3271 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,827 psi | 61% | 2966 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 44,947 psi | 70% | 3127 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 44% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,517 psi | 79% | 3156 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,369 psi | 74% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,379 psi | 63% | 3012 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,957 psi | 61% | 3018 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 41,626 psi | 65% | 3127 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 53,548 psi | 84% | 3179 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,456 psi | 74% | 3104 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,533 psi | 82% | 3212 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 46,543 psi | 73% | 3140 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,947 psi | 69% | 3015 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,960 psi | 67% | 2995 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 51,880 psi | 81% | 3166 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,234 psi | 65% | 2969 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,617 psi | 76% | 3159 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,138 psi | 75% | 3002 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,105 psi | 66% | 2930 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 46,137 psi | 72% | 3136 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 47,558 psi | 75% | 3104 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 36,579 psi | 57% | 2940 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 44,251 psi | 69% | 3058 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 53,925 psi | 85% | 3136 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,201 psi | 85% | 3153 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,484 psi | 71% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,394 psi | 65% | 2989 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 43,627 psi | 68% | 3028 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,460 psi | 82% | 3140 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,857 psi | 64% | 2986 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,966 psi | 50% | 2802 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,611 psi | 64% | 2953 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 42,395 psi | 66% | 3051 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,340 psi | 43% | 2740 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 92% | 46,963 psi | 74% | 3107 fps | 95.5% |
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 .308 | 139gr | Prvi Partizan FMJ. Alliant Reloder-26 delivers the highest muzzle velocity at 3,438 fps; across all powders the maximum-charge window runs from 2,113 fps to 3,438 fps. ADI AR 2217 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. The 139.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Norma MRP, Alliant Reloder-26, Hodgdon H414 rank at the top here: for .300 Norma Mag. with the .308 | 139gr | Prvi Partizan FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, ADI AR 2225 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.