Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 170gr | Remington SP Core-Lokt bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 55,230 psi | 87% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,579 psi | 89% | 3041 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,695 psi | 89% | 3153 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 92% | 53,722 psi | 84% | 3087 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 57,363 psi | 90% | 2999 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,203 psi | 90% | 3094 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 54,998 psi | 86% | 3094 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,487 psi | 78% | 2982 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,048 psi | 69% | 2936 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,508 psi | 90% | 3091 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,508 psi | 90% | 3091 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,319 psi | 90% | 3097 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,737 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,782 psi | 89% | 3081 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,027 psi | 86% | 3087 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,217 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,826 psi | 89% | 3156 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 54,215 psi | 85% | 3074 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 3054 fps | 98.1% |
| Bofors RP5 | <<locked>> | 94% | 55,027 psi | 86% | 3087 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 55,100 psi | 86% | 2979 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 3077 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 54,375 psi | 85% | 3031 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 57,101 psi | 89% | 3048 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 54,911 psi | 86% | 3028 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,580 psi | 90% | 3074 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,566 psi | 90% | 3015 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3196 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 54,824 psi | 86% | 3068 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,057 psi | 58% | 1919 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,724 psi | 89% | 3022 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,507 psi | 89% | 3005 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 56,855 psi | 89% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,927 psi | 88% | 3015 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 56,710 psi | 89% | 3133 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 57,319 psi | 90% | 3005 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,448 psi | 87% | 2999 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,304 psi | 88% | 3018 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,172 psi | 85% | 3018 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 39,740 psi | 62% | 2858 fps | 97.1% |
| Norma MRP | <<locked>> | 92% | 54,882 psi | 86% | 3110 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,824 psi | 86% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,522 psi | 90% | 3156 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 57,464 psi | 90% | 3081 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,869 psi | 88% | 3084 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1965 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,550 psi | 89% | 3061 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,737 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,347 psi | 87% | 3192 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,227 psi | 79% | 3061 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 56,449 psi | 88% | 2982 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,795 psi | 86% | 3002 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 56,362 psi | 88% | 3071 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 55,100 psi | 86% | 2979 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,319 psi | 90% | 3005 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,448 psi | 87% | 2999 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,231 psi | 88% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,507 psi | 89% | 2956 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,927 psi | 88% | 3064 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 56,086 psi | 88% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,449 psi | 88% | 2995 fps | 97.8% |
| Somchem S365 | <<locked>> | 88% | 55,230 psi | 87% | 3022 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,811 psi | 89% | 3041 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 57,363 psi | 90% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,710 psi | 89% | 3015 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,362 psi | 88% | 3018 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 55,927 psi | 88% | 3018 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,969 psi | 86% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,723 psi | 86% | 3104 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 98% | 54,578 psi | 86% | 3081 fps | 97.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 3071 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,231 psi | 88% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,563 psi | 86% | 3035 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,882 psi | 84% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,724 psi | 89% | 3035 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% | 34,301 psi | 54% | 2585 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 45,977 psi | 72% | 2861 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 42,902 psi | 67% | 2884 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 88% | 46,688 psi | 73% | 2953 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 53,838 psi | 84% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,973 psi | 64% | 2782 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 88% | 44,802 psi | 70% | 2897 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 96% | 43,221 psi | 68% | 2854 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 92% | 33,910 psi | 53% | 2674 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,696 psi | 61% | 2723 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,696 psi | 61% | 2723 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,932 psi | 69% | 2864 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,966 psi | 80% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,348 psi | 60% | 2717 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,305 psi | 62% | 2776 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,996 psi | 52% | 2618 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,603 psi | 48% | 2569 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,114 psi | 57% | 2756 fps | 98.4% |
| Bofors RP15 | <<locked>> | 86% | 38,943 psi | 61% | 2766 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 41,989 psi | 66% | 2864 fps | 95.6% |
| Bofors RP5 | <<locked>> | 84% | 39,305 psi | 62% | 2776 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 48,675 psi | 76% | 2864 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 41,336 psi | 65% | 2815 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 47,587 psi | 75% | 2910 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 50,111 psi | 79% | 2930 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 44,788 psi | 70% | 2841 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 88% | 47,007 psi | 74% | 2884 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,611 psi | 65% | 2749 fps | 100% |
| Hodgdon Retumbo | 81.9 gr | 90% | 38,928 psi | 61% | 2851 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,268 psi | 74% | 2933 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 1716 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,034 psi | 69% | 2792 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,038 psi | 78% | 2894 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 43,830 psi | 69% | 2805 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,311 psi | 73% | 2838 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 88% | 43,105 psi | 68% | 2871 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,659 psi | 75% | 2841 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 45,832 psi | 72% | 2828 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 31,575 psi | 49% | 2516 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 44,150 psi | 69% | 2828 fps | 96.7% |
| Norma 217 | <<locked>> | 98% | 37,130 psi | 58% | 2789 fps | 96% |
| Norma MRP | 75.6 gr | 80% | 35,810 psi | 56% | 2717 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 45,020 psi | 71% | 2848 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 42,931 psi | 67% | 2881 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 43,976 psi | 69% | 2841 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 86% | 35,781 psi | 56% | 2684 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 45% | 1759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,977 psi | 72% | 2881 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,222 psi | 69% | 2897 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,752 psi | 56% | 2759 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,441 psi | 73% | 2989 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,910 psi | 83% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,409 psi | 66% | 2766 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 37,710 psi | 59% | 2700 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 48,675 psi | 76% | 2864 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,659 psi | 75% | 2841 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 45,832 psi | 72% | 2828 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,895 psi | 83% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,572 psi | 73% | 2785 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,001 psi | 63% | 2756 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,823 psi | 83% | 2927 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,195 psi | 72% | 2812 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 42,032 psi | 66% | 2802 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,247 psi | 60% | 2684 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,415 psi | 79% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,485 psi | 73% | 2844 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 37,971 psi | 60% | 2671 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 45,919 psi | 72% | 2844 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 36,956 psi | 58% | 2700 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 44,338 psi | 69% | 2904 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 92% | 44,614 psi | 70% | 2890 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 47,848 psi | 75% | 3002 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,600 psi | 71% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,761 psi | 75% | 2913 fps | 99% |
| Winchester StaBALL HD | 74.8 gr | 80% | 29,312 psi | 46% | 2621 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 40,190 psi | 63% | 2726 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 76 powders for .300 Norma Mag. loaded with the .308 | 170gr | Remington SP Core-Lokt. Hodgdon Retumbo delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,196 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 170.0 gr projectile in 0.308" calls for a 1:6.0 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, Hodgdon Retumbo, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 170gr | Remington SP Core-Lokt 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.