Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 175gr | Prvi Partizan FMJ BT bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Accurate MAGPRO and Ramshot Grand.
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% | 56,579 psi | 89% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,114 psi | 85% | 2963 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,215 psi | 85% | 3074 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 92% | 55,114 psi | 86% | 3074 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 90% | 54,723 psi | 86% | 3015 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 94% | 56,304 psi | 88% | 3081 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,691 psi | 79% | 2976 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,208 psi | 71% | 2927 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,085 psi | 86% | 3015 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,868 psi | 86% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,043 psi | 88% | 3031 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,433 psi | 85% | 3005 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,391 psi | 88% | 3074 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,653 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,346 psi | 85% | 3077 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 55,550 psi | 87% | 3058 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 3045 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 56,391 psi | 88% | 3074 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 56,130 psi | 88% | 2959 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3064 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 55,550 psi | 87% | 3015 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,476 psi | 85% | 2969 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 92% | 56,144 psi | 88% | 3015 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,071 psi | 86% | 2999 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,288 psi | 87% | 2940 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,956 psi | 88% | 3182 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 56,144 psi | 88% | 3051 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,346 psi | 85% | 2946 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,522 psi | 90% | 2986 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 54,491 psi | 85% | 2956 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,029 psi | 89% | 2999 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 94% | 54,288 psi | 85% | 3058 fps | 98.4% |
| Lovex S065 | <<locked>> | 84% | 54,853 psi | 86% | 2930 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,536 psi | 89% | 2979 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,332 psi | 87% | 2999 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 40,973 psi | 64% | 2851 fps | 97.8% |
| Norma MRP | <<locked>> | 92% | 56,333 psi | 88% | 3097 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 56,014 psi | 88% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,027 psi | 86% | 3077 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 86% | 54,940 psi | 86% | 3002 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,479 psi | 90% | 3071 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 60% | 1939 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,056 psi | 85% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,115 psi | 88% | 3068 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 3179 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,793 psi | 81% | 3054 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 82% | 57,595 psi | 90% | 2963 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,912 psi | 88% | 2986 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 57,667 psi | 90% | 3054 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 56,130 psi | 88% | 2959 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,853 psi | 86% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,536 psi | 89% | 2979 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,174 psi | 90% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,566 psi | 90% | 2936 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,217 psi | 90% | 3051 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 57,159 psi | 90% | 2956 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,609 psi | 90% | 2979 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 56,594 psi | 89% | 2999 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,505 psi | 85% | 2969 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 54,810 psi | 86% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,302 psi | 85% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,653 psi | 90% | 3005 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 57,087 psi | 89% | 2995 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,333 psi | 88% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,101 psi | 88% | 3091 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 56,014 psi | 88% | 3068 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 3064 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,435 psi | 90% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,753 psi | 87% | 3015 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,738 psi | 87% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,259 psi | 85% | 2959 fps | 99.1% |
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% | 35,201 psi | 55% | 2579 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 47,079 psi | 74% | 2844 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 41,031 psi | 64% | 2808 fps | 95.1% |
| Accurate MAGPRO | 84.7 gr | 88% | 47,921 psi | 75% | 2943 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 39,160 psi | 61% | 2707 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 42,888 psi | 67% | 2822 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 41,423 psi | 65% | 2779 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 34,766 psi | 54% | 2671 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,595 psi | 62% | 2710 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,962 psi | 70% | 2848 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,199 psi | 82% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,233 psi | 61% | 2703 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,536 psi | 59% | 2700 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,881 psi | 53% | 2608 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,385 psi | 46% | 2503 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,202 psi | 58% | 2749 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 39,943 psi | 63% | 2756 fps | 95.9% |
| Bofors RP30 | <<locked>> | 92% | 40,379 psi | 63% | 2792 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 37,536 psi | 59% | 2700 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 49,588 psi | 78% | 2848 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,624 psi | 62% | 2743 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 48,631 psi | 76% | 2894 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,111 psi | 80% | 2910 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,818 psi | 72% | 2828 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,991 psi | 71% | 2812 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,583 psi | 67% | 2730 fps | 100% |
| Hodgdon Retumbo | 80.1 gr | 88% | 37,420 psi | 59% | 2779 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 48,443 psi | 76% | 2920 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1696 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,933 psi | 70% | 2772 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,952 psi | 80% | 2874 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,831 psi | 70% | 2789 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,353 psi | 70% | 2762 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 86% | 41,292 psi | 65% | 2795 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,573 psi | 76% | 2822 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,760 psi | 73% | 2808 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 30,371 psi | 48% | 2448 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 45,136 psi | 71% | 2815 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 35,737 psi | 56% | 2720 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 36,796 psi | 58% | 2710 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 46,035 psi | 72% | 2828 fps | 99.9% |
| Ramshot Grand | 80.6 gr | 86% | 41,118 psi | 64% | 2805 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,976 psi | 70% | 2825 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 36,753 psi | 58% | 2677 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,500 psi | 45% | 1736 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,094 psi | 74% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,324 psi | 71% | 2881 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,243 psi | 54% | 2687 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,498 psi | 70% | 2913 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 53,998 psi | 85% | 2907 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,308 psi | 68% | 2753 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 38,624 psi | 61% | 2690 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,588 psi | 78% | 2848 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,573 psi | 76% | 2822 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,760 psi | 73% | 2808 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,809 psi | 84% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,471 psi | 74% | 2766 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,319 psi | 60% | 2684 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 53,838 psi | 84% | 2904 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,179 psi | 69% | 2736 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 43,120 psi | 68% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,146 psi | 61% | 2671 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,401 psi | 81% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,485 psi | 74% | 2825 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,274 psi | 57% | 2598 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 46,905 psi | 74% | 2828 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,927 psi | 59% | 2684 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 45,484 psi | 71% | 2894 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 42,714 psi | 67% | 2818 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 49,240 psi | 77% | 2995 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,615 psi | 73% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,820 psi | 77% | 2897 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,110 psi | 47% | 2618 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,319 psi | 60% | 2654 fps | 95.5% |
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 74 powders for .300 Norma Mag. loaded with the .308 | 175gr | Prvi Partizan FMJ BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,182 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,182 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 175.0 gr projectile in 0.308" calls for a 1:12.0 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. Hodgdon Retumbo, Accurate MAGPRO, Ramshot Grand rank at the top here: for .300 Norma Mag. with the .308 | 175gr | Prvi Partizan FMJ BT 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.