Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 168gr | Sierra MatchKing bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 55,434 psi | 87% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,710 psi | 89% | 3061 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,012 psi | 85% | 3107 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 57,363 psi | 90% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,435 psi | 90% | 3117 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 55,332 psi | 87% | 3117 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,574 psi | 78% | 3002 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,280 psi | 69% | 2956 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,464 psi | 90% | 3117 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,868 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,000 psi | 89% | 3104 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,405 psi | 87% | 3114 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,623 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,145 psi | 90% | 3179 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 54,389 psi | 85% | 3094 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3077 fps | 98.1% |
| Bofors RP5 | <<locked>> | 94% | 55,405 psi | 87% | 3114 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 55,274 psi | 87% | 3002 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3100 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 54,679 psi | 86% | 3054 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 57,232 psi | 90% | 3071 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 55,274 psi | 87% | 3054 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,099 psi | 85% | 3031 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,215 psi | 85% | 2986 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3215 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 55,013 psi | 86% | 3087 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 58% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,971 psi | 89% | 3045 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,666 psi | 89% | 3025 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 57,000 psi | 89% | 3051 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,115 psi | 88% | 3038 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 56,840 psi | 89% | 3156 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 57,464 psi | 90% | 3028 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,550 psi | 87% | 3018 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,433 psi | 85% | 3041 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 39,856 psi | 62% | 2874 fps | 97% |
| Norma MRP | <<locked>> | 92% | 55,259 psi | 87% | 3136 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,969 psi | 86% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,693 psi | 84% | 3110 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 57,711 psi | 90% | 3100 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,318 psi | 88% | 3110 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,927 psi | 59% | 1982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,826 psi | 89% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,984 psi | 86% | 3107 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 3215 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,589 psi | 79% | 3084 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 56,681 psi | 89% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,013 psi | 86% | 3025 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 56,608 psi | 89% | 3094 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 55,274 psi | 87% | 3002 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,464 psi | 90% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,550 psi | 87% | 3018 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,463 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,782 psi | 89% | 2979 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,159 psi | 88% | 3087 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 56,304 psi | 88% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,565 psi | 89% | 3015 fps | 97.8% |
| Somchem S365 | <<locked>> | 88% | 55,535 psi | 87% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,043 psi | 89% | 3064 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 57,522 psi | 90% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,855 psi | 89% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,724 psi | 89% | 3045 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 56,014 psi | 88% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,042 psi | 86% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,071 psi | 86% | 3127 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,868 psi | 86% | 3100 fps | 97.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,648 psi | 81% | 3094 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,449 psi | 88% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,868 psi | 86% | 3058 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,288 psi | 85% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,058 psi | 89% | 3058 fps | 99.2% |
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 3100 | <<locked>> | 80% | 34,490 psi | 54% | 2605 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 46,180 psi | 72% | 2881 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 88% | 46,847 psi | 73% | 2972 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 54,070 psi | 85% | 2966 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 41,089 psi | 64% | 2802 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 88% | 45,020 psi | 71% | 2920 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 96% | 43,352 psi | 68% | 2874 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 92% | 34,156 psi | 54% | 2697 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,179 psi | 69% | 2887 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,184 psi | 80% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,508 psi | 60% | 2736 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,421 psi | 62% | 2795 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,054 psi | 52% | 2638 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,748 psi | 48% | 2589 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,245 psi | 57% | 2776 fps | 98.4% |
| Bofors RP15 | <<locked>> | 86% | 39,073 psi | 61% | 2782 fps | 95.1% |
| Bofors RP30 | <<locked>> | 94% | 42,192 psi | 66% | 2884 fps | 95.6% |
| Bofors RP5 | <<locked>> | 84% | 39,421 psi | 62% | 2795 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 48,718 psi | 76% | 2884 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 41,481 psi | 65% | 2835 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 47,761 psi | 75% | 2930 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 50,314 psi | 79% | 2949 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 45,049 psi | 71% | 2864 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 88% | 47,239 psi | 74% | 2907 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,684 psi | 65% | 2769 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 39,131 psi | 61% | 2874 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,543 psi | 75% | 2956 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,222 psi | 69% | 2812 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,067 psi | 78% | 2913 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 43,888 psi | 69% | 2825 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,601 psi | 73% | 2861 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 88% | 43,323 psi | 68% | 2894 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,718 psi | 75% | 2861 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 46,035 psi | 72% | 2848 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 31,763 psi | 50% | 2533 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 44,309 psi | 69% | 2848 fps | 96.7% |
| Norma 217 | <<locked>> | 98% | 37,231 psi | 58% | 2808 fps | 96% |
| Norma MRP | 76.5 gr | 80% | 35,969 psi | 56% | 2736 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 45,252 psi | 71% | 2867 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 43,120 psi | 68% | 2900 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 44,135 psi | 69% | 2861 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 86% | 35,955 psi | 56% | 2703 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,122 psi | 72% | 2900 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,324 psi | 69% | 2917 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,998 psi | 56% | 2779 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,818 psi | 73% | 3012 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 53,142 psi | 83% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,583 psi | 67% | 2785 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 40,524 psi | 64% | 2785 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 48,718 psi | 76% | 2884 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,718 psi | 75% | 2861 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 46,035 psi | 72% | 2848 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,011 psi | 83% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,804 psi | 73% | 2808 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,190 psi | 63% | 2779 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,852 psi | 83% | 2946 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,427 psi | 73% | 2831 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 42,264 psi | 66% | 2822 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,435 psi | 60% | 2703 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 50,647 psi | 79% | 2867 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,659 psi | 73% | 2864 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 38,101 psi | 60% | 2687 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 46,093 psi | 72% | 2864 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 37,188 psi | 58% | 2720 fps | 99.1% |
| Vihtavuori N560 | 82.2 gr | 86% | 44,585 psi | 70% | 2927 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 92% | 44,744 psi | 70% | 2910 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 48,124 psi | 75% | 3025 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,847 psi | 72% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,935 psi | 75% | 2933 fps | 99% |
| Winchester StaBALL HD | 75.7 gr | 80% | 29,428 psi | 46% | 2641 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 40,277 psi | 63% | 2746 fps | 95.7% |
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 78 powders for .300 Norma Mag. loaded with the .308 | 168gr | Sierra MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,215 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 168.0 gr projectile in 0.308" calls for a 1:13.5 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Norma Mag. with the .308 | 168gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 8133 Enduron, Vihtavuori N170 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.