Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 150gr | Nosler Expansion Tip bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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>> | 82% | 57,290 psi | 90% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,172 psi | 86% | 3104 fps | 98.5% |
| Accurate 3100 | <<locked>> | 98% | 54,273 psi | 85% | 3150 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 54,273 psi | 85% | 3084 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,825 psi | 87% | 3202 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,811 psi | 87% | 3301 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 98% | 57,029 psi | 89% | 3304 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 54,650 psi | 86% | 3127 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,217 psi | 90% | 3255 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 54,897 psi | 86% | 3245 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,406 psi | 90% | 3251 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,406 psi | 90% | 3251 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,564 psi | 87% | 3150 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,608 psi | 87% | 3173 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,942 psi | 89% | 3268 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,433 psi | 85% | 3228 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,623 psi | 89% | 3241 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,186 psi | 85% | 3238 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,543 psi | 75% | 3143 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,434 psi | 87% | 3314 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 3219 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 56,405 psi | 88% | 3166 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,186 psi | 85% | 3238 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 55,724 psi | 87% | 3150 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,739 psi | 89% | 3182 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,462 psi | 85% | 3199 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 57,609 psi | 90% | 3219 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,085 psi | 86% | 3186 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,725 psi | 90% | 3228 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,290 psi | 90% | 3186 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,427 psi | 73% | 3176 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 88% | 55,027 psi | 86% | 3235 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 57% | 2021 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,522 psi | 90% | 3163 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,405 psi | 88% | 3143 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 57,203 psi | 90% | 3189 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,435 psi | 90% | 3182 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 56,463 psi | 88% | 3196 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,072 psi | 89% | 3202 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,347 psi | 88% | 3173 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3281 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 54,099 psi | 85% | 3097 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,595 psi | 90% | 3176 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 55,637 psi | 87% | 3166 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,993 psi | 75% | 3038 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 54,911 psi | 86% | 3156 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,549 psi | 85% | 3182 fps | 97.7% |
| Norma MRP | <<locked>> | 96% | 53,925 psi | 85% | 3264 fps | 99% |
| Norma URP | <<locked>> | 90% | 54,708 psi | 86% | 3189 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,072 psi | 88% | 3186 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,884 psi | 89% | 3301 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 57,377 psi | 90% | 3248 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,010 psi | 80% | 3159 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 2070 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,666 psi | 89% | 3169 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,954 psi | 85% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,173 psi | 88% | 3228 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,679 psi | 86% | 3258 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,760 psi | 73% | 3173 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 82% | 55,970 psi | 88% | 3114 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,463 psi | 88% | 3159 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,984 psi | 86% | 3159 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,767 psi | 87% | 3225 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 55,724 psi | 87% | 3150 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,595 psi | 90% | 3176 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 54,099 psi | 85% | 3097 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,637 psi | 87% | 3166 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,621 psi | 86% | 3166 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,203 psi | 90% | 3038 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,276 psi | 90% | 3127 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,303 psi | 87% | 3219 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 56,376 psi | 88% | 3156 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,000 psi | 89% | 3153 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 54,447 psi | 85% | 3189 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,420 psi | 88% | 3196 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 56,420 psi | 88% | 3068 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,753 psi | 89% | 3084 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,157 psi | 85% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,652 psi | 89% | 3182 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3169 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 55,027 psi | 86% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,898 psi | 88% | 3186 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,319 psi | 90% | 3255 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,085 psi | 85% | 3255 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,594 psi | 89% | 3143 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,650 psi | 86% | 3202 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,111 psi | 80% | 3291 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,927 psi | 89% | 3196 fps | 98.2% |
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% | 53,635 psi | 84% | 3025 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,488 psi | 81% | 3038 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 35,491 psi | 56% | 2762 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,923 psi | 80% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,117 psi | 61% | 2877 fps | 98.1% |
| Accurate High Country | <<locked>> | 92% | 48,298 psi | 76% | 3159 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 96% | 52,997 psi | 83% | 3228 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 48,066 psi | 75% | 3009 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 43,584 psi | 68% | 2989 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 51,198 psi | 80% | 3173 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,932 psi | 69% | 2992 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,932 psi | 69% | 2992 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,849 psi | 77% | 3035 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,054 psi | 82% | 3110 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,159 psi | 60% | 2894 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,685 psi | 68% | 3035 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,453 psi | 68% | 2982 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,990 psi | 69% | 3035 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,804 psi | 44% | 2605 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,968 psi | 53% | 2808 fps | 95.2% |
| Alliant Reloder-26 | 78.5 gr | 82% | 32,300 psi | 51% | 2795 fps | 95.2% |
| Bofors RP15 | <<locked>> | 94% | 43,381 psi | 68% | 3022 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,211 psi | 77% | 3045 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,990 psi | 69% | 3035 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,033 psi | 67% | 2900 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 80% | 49,603 psi | 78% | 3058 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 41,336 psi | 65% | 2933 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 44,208 psi | 69% | 2963 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 94% | 51,401 psi | 81% | 3120 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,809 psi | 84% | 3163 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,621 psi | 56% | 2776 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 98% | 43,337 psi | 68% | 3100 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 40,480 psi | 63% | 2943 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 43% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,560 psi | 79% | 3048 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,895 psi | 83% | 3081 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 41,336 psi | 65% | 2881 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,614 psi | 70% | 2940 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 37,695 psi | 59% | 2828 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 53,403 psi | 84% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,779 psi | 83% | 3107 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 48,965 psi | 77% | 3143 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 50,807 psi | 80% | 3045 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,974 psi | 66% | 2881 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 40,234 psi | 63% | 2858 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 36,796 psi | 58% | 2795 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 51,387 psi | 81% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,077 psi | 69% | 2979 fps | 95% |
| Norma MRP | 81.8 gr | 88% | 40,306 psi | 63% | 2982 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,044 psi | 61% | 2874 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 52,286 psi | 82% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 49,139 psi | 77% | 3156 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,985 psi | 60% | 2858 fps | 96% |
| Ramshot Magnum | <<locked>> | 94% | 40,451 psi | 63% | 2936 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 43% | 1854 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,574 psi | 78% | 3041 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,456 psi | 73% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,146 psi | 61% | 2897 fps | 97.8% |
| ReloadSwiss RS 70 | 75.9 gr | 80% | 38,000 psi | 60% | 2907 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,350 psi | 63% | 3015 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 52,576 psi | 82% | 3058 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,311 psi | 73% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,283 psi | 76% | 3035 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 42,511 psi | 67% | 2963 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,033 psi | 67% | 2900 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,974 psi | 66% | 2881 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 50,807 psi | 80% | 3045 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,234 psi | 63% | 2858 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,819 psi | 75% | 3048 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,427 psi | 74% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,089 psi | 64% | 2818 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,020 psi | 71% | 3022 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,514 psi | 73% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,258 psi | 83% | 3087 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 35,418 psi | 56% | 2822 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 40,190 psi | 63% | 2877 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 53,098 psi | 83% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,330 psi | 84% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,527 psi | 70% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,393 psi | 63% | 2877 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 42,554 psi | 67% | 2920 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,561 psi | 81% | 3022 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,885 psi | 63% | 2874 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 30,806 psi | 48% | 2690 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 94% | 50,256 psi | 79% | 3179 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,755 psi | 62% | 2844 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 41,510 psi | 65% | 2936 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,252 psi | 41% | 2628 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,832 psi | 72% | 2995 fps | 95.8% |
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 89 powders for .300 Norma Mag. loaded with the .308 | 150gr | Nosler Expansion Tip. Alliant Reloder-26 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 2,021 fps to 3,314 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 89 of the 89 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 150.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Norma Mag. with the .308 | 150gr | Nosler Expansion Tip 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.