Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 167gr | MRR Green Hunting bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Winchester StaBALL HD and Norma MRP.
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 3100 | <<locked>> | 96% | 55,579 psi | 87% | 3031 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 57,174 psi | 90% | 3077 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,464 psi | 90% | 3192 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 54,375 psi | 85% | 3123 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 55,071 psi | 86% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,505 psi | 85% | 3071 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 56,130 psi | 88% | 3136 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,659 psi | 73% | 2946 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,408 psi | 65% | 2894 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,839 psi | 86% | 3071 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,839 psi | 86% | 3071 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,101 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,447 psi | 85% | 3081 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,724 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,128 psi | 85% | 3061 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,840 psi | 88% | 3130 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,768 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 3100 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,450 psi | 90% | 3196 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,752 psi | 86% | 3107 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 57,101 psi | 89% | 3025 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 3022 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 55,840 psi | 88% | 3130 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,260 psi | 88% | 3025 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3051 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 82% | 57,246 psi | 90% | 3048 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,405 psi | 87% | 3074 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,549 psi | 85% | 3031 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 56,014 psi | 88% | 3071 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,969 psi | 86% | 3054 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,882 psi | 86% | 3002 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,387 psi | 81% | 3159 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 56,115 psi | 88% | 3114 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 58% | 1929 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,418 psi | 85% | 3009 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,346 psi | 85% | 2992 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 57,667 psi | 90% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,159 psi | 90% | 3058 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 57,609 psi | 90% | 3173 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 54,665 psi | 86% | 2989 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,260 psi | 88% | 3038 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,069 psi | 83% | 2992 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 55,361 psi | 87% | 3061 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 55,608 psi | 87% | 3153 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 55,637 psi | 87% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,259 psi | 85% | 3123 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 88% | 54,752 psi | 86% | 3064 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3127 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 59% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,116 psi | 90% | 3035 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,143 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,479 psi | 90% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,825 psi | 87% | 3130 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 3159 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,363 psi | 90% | 3025 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,883 psi | 88% | 3045 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 57,130 psi | 90% | 3107 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,260 psi | 88% | 3025 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,665 psi | 86% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,260 psi | 88% | 3038 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,405 psi | 87% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,435 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,099 psi | 85% | 2940 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,666 psi | 89% | 3104 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 57,116 psi | 90% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,566 psi | 90% | 3035 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 55,883 psi | 88% | 3061 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,667 psi | 90% | 3081 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 54,853 psi | 86% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,696 psi | 90% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,174 psi | 90% | 3058 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 56,768 psi | 89% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,245 psi | 87% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,535 psi | 87% | 3143 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 3114 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,522 psi | 90% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,608 psi | 87% | 3077 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,259 psi | 85% | 3182 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,998 psi | 85% | 3015 fps | 98.7% |
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 3100 | <<locked>> | 80% | 31,734 psi | 50% | 2543 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 43,120 psi | 68% | 2831 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 43,076 psi | 68% | 2913 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 92% | 50,575 psi | 79% | 3054 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 51,764 psi | 81% | 2936 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,553 psi | 65% | 2818 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 45,600 psi | 71% | 2936 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 43,671 psi | 68% | 2884 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 36,245 psi | 57% | 2762 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,843 psi | 66% | 2818 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,843 psi | 66% | 2818 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,721 psi | 83% | 2956 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,698 psi | 65% | 2844 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,109 psi | 75% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,437 psi | 65% | 2812 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,407 psi | 62% | 2802 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,719 psi | 48% | 2582 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,589 psi | 48% | 2595 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,402 psi | 52% | 2710 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 41,829 psi | 66% | 2858 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 53,388 psi | 84% | 2969 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,945 psi | 66% | 2887 fps | 95.3% |
| Bofors RP5 | <<locked>> | 86% | 39,407 psi | 62% | 2802 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 46,354 psi | 73% | 2844 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 41,872 psi | 66% | 2848 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 53,577 psi | 84% | 2989 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,165 psi | 71% | 2887 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 47,834 psi | 75% | 2907 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 48,820 psi | 77% | 2943 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,906 psi | 75% | 2927 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,146 psi | 61% | 2726 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,102 psi | 61% | 2877 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 44,599 psi | 70% | 2907 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,032 psi | 66% | 2769 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,921 psi | 75% | 2877 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 41,292 psi | 65% | 2779 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,210 psi | 74% | 2877 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 90% | 43,584 psi | 68% | 2904 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 45,295 psi | 71% | 2822 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 43,598 psi | 68% | 2805 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 33,286 psi | 52% | 2585 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 41,872 psi | 66% | 2802 fps | 95.7% |
| Norma MRP | 76.4 gr | 82% | 35,882 psi | 56% | 2743 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 42,699 psi | 67% | 2825 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 43,511 psi | 68% | 2913 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 41,597 psi | 65% | 2815 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 38,624 psi | 61% | 2776 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 44% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,374 psi | 84% | 2972 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,140 psi | 80% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,308 psi | 68% | 2854 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,655 psi | 65% | 2867 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,897 psi | 56% | 2782 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 50,343 psi | 79% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,047 psi | 67% | 2802 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 40,741 psi | 64% | 2795 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 46,354 psi | 73% | 2844 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,295 psi | 71% | 2822 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 43,598 psi | 68% | 2805 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,895 psi | 81% | 2976 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,836 psi | 80% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,309 psi | 69% | 2766 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,393 psi | 63% | 2792 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 50,241 psi | 79% | 2913 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,963 psi | 74% | 2848 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 39,523 psi | 62% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,897 psi | 56% | 2651 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 48,153 psi | 75% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,048 psi | 69% | 2822 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 38,130 psi | 60% | 2697 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 43,482 psi | 68% | 2825 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 34,432 psi | 54% | 2664 fps | 98.3% |
| Vihtavuori N560 | 83.9 gr | 90% | 48,240 psi | 76% | 3009 fps | 96% |
| Vihtavuori N565 | <<locked>> | 94% | 44,556 psi | 70% | 2917 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,308 psi | 68% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,295 psi | 71% | 2890 fps | 98.3% |
| Winchester StaBALL HD | 73.8 gr | 80% | 27,137 psi | 43% | 2566 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,654 psi | 64% | 2759 fps | 95.6% |
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 79 powders for .300 Norma Mag. loaded with the .308 | 167gr | MRR Green Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,196 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 167.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Vihtavuori N560, Winchester StaBALL HD, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 167gr | MRR Green 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.