Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 170gr | Sako Powerhead Blade bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Ramshot Grand, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 96% | 55,985 psi | 88% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,421 psi | 90% | 3054 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,653 psi | 90% | 3169 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 94% | 54,810 psi | 86% | 3107 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 55,332 psi | 87% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,795 psi | 86% | 3051 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 56,275 psi | 88% | 3114 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,007 psi | 74% | 2933 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,597 psi | 65% | 2881 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,911 psi | 86% | 3048 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,391 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,882 psi | 86% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,970 psi | 88% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,230 psi | 85% | 3038 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,028 psi | 88% | 3107 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,159 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,634 psi | 82% | 3081 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,740 psi | 90% | 3173 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,955 psi | 86% | 3087 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 57,421 psi | 90% | 3005 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,588 psi | 76% | 3002 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 56,028 psi | 88% | 3107 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 56,420 psi | 88% | 3002 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3031 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 57,624 psi | 90% | 3028 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,637 psi | 87% | 3054 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,882 psi | 86% | 3012 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 56,376 psi | 88% | 3051 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,085 psi | 86% | 3031 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,085 psi | 86% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,619 psi | 81% | 3140 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 56,246 psi | 88% | 3094 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 58% | 1909 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,636 psi | 86% | 2986 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,636 psi | 86% | 2972 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 57,711 psi | 90% | 3045 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,421 psi | 90% | 3038 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 53,853 psi | 84% | 3087 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 54,984 psi | 86% | 2969 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,449 psi | 88% | 3015 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2969 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,405 psi | 87% | 3038 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 55,825 psi | 87% | 3130 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,840 psi | 88% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,534 psi | 85% | 3107 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 54,781 psi | 86% | 3038 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3104 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,290 psi | 90% | 3012 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,361 psi | 87% | 3061 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,609 psi | 90% | 3077 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,144 psi | 88% | 3110 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 3140 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 57,522 psi | 90% | 3002 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,101 psi | 88% | 3025 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 57,435 psi | 90% | 3091 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 56,420 psi | 88% | 3002 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,984 psi | 86% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,449 psi | 88% | 3015 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,782 psi | 87% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,711 psi | 90% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,288 psi | 85% | 2920 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,985 psi | 89% | 3084 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 57,217 psi | 90% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,711 psi | 90% | 3012 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 56,144 psi | 88% | 3038 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,085 psi | 85% | 2999 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 54,969 psi | 86% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,157 psi | 85% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,334 psi | 90% | 3035 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 57,000 psi | 89% | 3035 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,535 psi | 87% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,767 psi | 87% | 3123 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3094 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,653 psi | 90% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,840 psi | 88% | 3054 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,636 psi | 86% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,157 psi | 85% | 2992 fps | 98.8% |
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% | 31,952 psi | 50% | 2533 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 43,366 psi | 68% | 2812 fps | 99.7% |
| Accurate High Country | <<locked>> | 86% | 43,294 psi | 68% | 2897 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 90% | 47,355 psi | 74% | 2969 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 51,808 psi | 81% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,015 psi | 61% | 2740 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 45,658 psi | 72% | 2913 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 43,801 psi | 69% | 2864 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 94% | 34,127 psi | 53% | 2684 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,349 psi | 62% | 2740 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,982 psi | 83% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,945 psi | 66% | 2828 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,443 psi | 76% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,972 psi | 61% | 2733 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,755 psi | 62% | 2789 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,893 psi | 48% | 2566 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,690 psi | 48% | 2579 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,576 psi | 53% | 2697 fps | 97.5% |
| Bofors RP15 | <<locked>> | 88% | 39,218 psi | 61% | 2776 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 53,693 psi | 84% | 2949 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,235 psi | 66% | 2874 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 39,755 psi | 62% | 2789 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 46,557 psi | 73% | 2825 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 41,959 psi | 66% | 2828 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 53,896 psi | 84% | 2969 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,426 psi | 71% | 2867 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 48,080 psi | 75% | 2887 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 45,614 psi | 71% | 2858 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,935 psi | 75% | 2904 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,363 psi | 62% | 2707 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,334 psi | 62% | 2864 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 44,817 psi | 70% | 2887 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 43% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,105 psi | 66% | 2753 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,153 psi | 75% | 2858 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 41,524 psi | 65% | 2762 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,382 psi | 70% | 2799 fps | 95% |
| IMR 7828 SSC | 80 gr | 90% | 43,801 psi | 69% | 2887 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 45,484 psi | 71% | 2802 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,656 psi | 68% | 2782 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 31,314 psi | 49% | 2513 fps | 95% |
| Norma 204 | <<locked>> | 80% | 41,989 psi | 66% | 2785 fps | 95.9% |
| Norma MRP | <<locked>> | 82% | 36,056 psi | 56% | 2730 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 42,786 psi | 67% | 2802 fps | 99.6% |
| Ramshot Grand | 82.4 gr | 90% | 43,613 psi | 68% | 2894 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 41,727 psi | 65% | 2795 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 36,042 psi | 56% | 2694 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,664 psi | 84% | 2956 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,547 psi | 81% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,453 psi | 68% | 2835 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,814 psi | 66% | 2848 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,998 psi | 56% | 2769 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 50,372 psi | 79% | 2894 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,178 psi | 68% | 2782 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 38,072 psi | 60% | 2713 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 46,557 psi | 73% | 2825 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,484 psi | 71% | 2802 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,656 psi | 68% | 2782 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,011 psi | 82% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,010 psi | 80% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,541 psi | 70% | 2746 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,509 psi | 63% | 2772 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 50,502 psi | 79% | 2890 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,210 psi | 74% | 2831 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 39,639 psi | 62% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,114 psi | 57% | 2638 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 48,211 psi | 76% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,280 psi | 69% | 2805 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,276 psi | 60% | 2680 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 43,743 psi | 69% | 2805 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,505 psi | 54% | 2644 fps | 98.5% |
| Vihtavuori N560 | <<locked>> | 88% | 45,136 psi | 71% | 2923 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 44,875 psi | 70% | 2900 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,482 psi | 68% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,426 psi | 71% | 2867 fps | 98.5% |
| Winchester StaBALL HD | 73.1 gr | 80% | 27,224 psi | 43% | 2552 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,857 psi | 64% | 2743 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 78 powders for .300 Norma Mag. loaded with the .308 | 170gr | Sako Powerhead Blade. Alliant Reloder-26 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,173 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 170.0 gr projectile in 0.308" calls for a 1:10.5 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. Ramshot Grand, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .300 Norma Mag. with the .308 | 170gr | Sako Powerhead Blade 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.