Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 154gr | Hasler Hunting 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 Accurate High Country.
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% | 56,869 psi | 89% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,708 psi | 86% | 3054 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3159 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 57,479 psi | 90% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,376 psi | 87% | 3156 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,100 psi | 86% | 3251 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 98% | 56,086 psi | 88% | 3251 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 57,696 psi | 90% | 3133 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,637 psi | 89% | 3205 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 54,288 psi | 85% | 3196 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,637 psi | 89% | 3202 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,637 psi | 89% | 3202 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,114 psi | 86% | 3104 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,114 psi | 86% | 3123 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,318 psi | 88% | 3222 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,780 psi | 84% | 3182 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,869 psi | 88% | 3189 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3258 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,114 psi | 85% | 3176 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 3094 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,578 psi | 86% | 3264 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 3169 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 55,782 psi | 87% | 3117 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3258 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 55,230 psi | 87% | 3104 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,173 psi | 88% | 3136 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,667 psi | 90% | 3215 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 56,971 psi | 89% | 3169 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 54,375 psi | 85% | 3136 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,043 psi | 89% | 3182 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,710 psi | 89% | 3140 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,890 psi | 72% | 3133 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 88% | 54,273 psi | 85% | 3186 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 57% | 1985 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,014 psi | 89% | 3114 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,014 psi | 88% | 3097 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 56,724 psi | 89% | 3143 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,971 psi | 89% | 3133 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 55,898 psi | 88% | 3150 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,565 psi | 89% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,840 psi | 88% | 3127 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3232 fps | 97.1% |
| Lovex S062 | <<locked>> | 84% | 57,290 psi | 90% | 3107 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,188 psi | 90% | 3130 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 55,013 psi | 86% | 3117 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,384 psi | 74% | 2992 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 54,418 psi | 85% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,882 psi | 84% | 3133 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 57,246 psi | 90% | 3284 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 57,696 psi | 90% | 3196 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,593 psi | 87% | 3136 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3251 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 56,753 psi | 89% | 3199 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,198 psi | 79% | 3110 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 58% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,231 psi | 88% | 3120 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,203 psi | 90% | 3235 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,492 psi | 87% | 3179 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,882 psi | 84% | 3209 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 3127 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 82% | 55,579 psi | 87% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,043 psi | 88% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,549 psi | 85% | 3114 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,158 psi | 86% | 3176 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 55,230 psi | 87% | 3104 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,188 psi | 90% | 3130 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 57,290 psi | 90% | 3107 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,013 psi | 86% | 3117 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,114 psi | 85% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,739 psi | 89% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,695 psi | 89% | 3077 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,694 psi | 86% | 3169 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 55,985 psi | 88% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,260 psi | 88% | 3104 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 57,638 psi | 90% | 3202 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,869 psi | 88% | 3150 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 56,144 psi | 88% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,478 psi | 89% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,406 psi | 90% | 3084 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,246 psi | 88% | 3136 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,230 psi | 87% | 3123 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 54,636 psi | 86% | 3031 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,158 psi | 86% | 3136 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,478 psi | 89% | 3202 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,348 psi | 90% | 3274 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,057 psi | 88% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,070 psi | 85% | 3156 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,154 psi | 79% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,086 psi | 88% | 3143 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% | 53,185 psi | 83% | 2979 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,140 psi | 80% | 2992 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 35,041 psi | 55% | 2720 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,473 psi | 79% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,783 psi | 61% | 2838 fps | 98.2% |
| Accurate High Country | 83.1 gr | 92% | 47,558 psi | 75% | 3107 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 96% | 52,199 psi | 82% | 3179 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,834 psi | 75% | 2966 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 43,178 psi | 68% | 2946 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 50,720 psi | 79% | 3127 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,352 psi | 68% | 2943 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,352 psi | 68% | 2943 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,443 psi | 76% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,677 psi | 81% | 3064 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,782 psi | 59% | 2851 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,250 psi | 68% | 2989 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,873 psi | 67% | 2936 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,366 psi | 68% | 2989 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,514 psi | 43% | 2566 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,562 psi | 53% | 2766 fps | 95.2% |
| Alliant Reloder-26 | 76.3 gr | 82% | 31,807 psi | 50% | 2753 fps | 95.2% |
| Bofors RP15 | <<locked>> | 94% | 42,772 psi | 67% | 2972 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 48,675 psi | 76% | 2999 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,366 psi | 68% | 2989 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 42,656 psi | 67% | 2861 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 49,124 psi | 77% | 3012 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 40,915 psi | 64% | 2890 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 43,772 psi | 69% | 2917 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 94% | 50,633 psi | 79% | 3068 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,301 psi | 84% | 3117 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,215 psi | 55% | 2730 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,786 psi | 67% | 3054 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 39,972 psi | 63% | 2897 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1775 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,328 psi | 79% | 3002 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,591 psi | 82% | 3035 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 40,944 psi | 64% | 2838 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,309 psi | 69% | 2897 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 37,202 psi | 58% | 2782 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 53,055 psi | 83% | 3097 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,402 psi | 82% | 3064 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 96% | 48,269 psi | 76% | 3094 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 50,386 psi | 79% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,582 psi | 65% | 2835 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 39,755 psi | 62% | 2812 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 36,347 psi | 57% | 2756 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 51,053 psi | 80% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,642 psi | 68% | 2933 fps | 95.1% |
| Norma MRP | 79.5 gr | 88% | 39,697 psi | 62% | 2933 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,551 psi | 60% | 2831 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 51,750 psi | 81% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,356 psi | 76% | 3104 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 37,449 psi | 59% | 2812 fps | 96% |
| Ramshot Magnum | <<locked>> | 94% | 39,914 psi | 63% | 2890 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,211 psi | 77% | 2995 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,021 psi | 72% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,769 psi | 61% | 2854 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,550 psi | 59% | 2861 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,813 psi | 62% | 2972 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,112 psi | 82% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,759 psi | 72% | 2936 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,703 psi | 75% | 2986 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 45,049 psi | 71% | 2982 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 42,656 psi | 67% | 2861 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,582 psi | 65% | 2835 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 50,386 psi | 79% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,755 psi | 62% | 2812 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,210 psi | 74% | 2995 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,963 psi | 74% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,640 psi | 64% | 2776 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,643 psi | 70% | 2976 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,122 psi | 72% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,649 psi | 83% | 3041 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 35,041 psi | 55% | 2782 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 39,784 psi | 62% | 2835 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 52,533 psi | 82% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,779 psi | 83% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,019 psi | 69% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,059 psi | 63% | 2835 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 42,105 psi | 66% | 2877 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,140 psi | 80% | 2976 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,494 psi | 62% | 2831 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,458 psi | 48% | 2648 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 94% | 49,763 psi | 78% | 3136 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,334 psi | 62% | 2802 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 41,089 psi | 64% | 2894 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,918 psi | 41% | 2589 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,252 psi | 71% | 2946 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 | 154gr | Hasler Hunting. Norma MRP delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,284 fps. Accurate 3100 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 154.0 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. Alliant Reloder-26, Norma MRP, Accurate High Country rank at the top here: for .300 Norma Mag. with the .308 | 154gr | Hasler Hunting 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.