Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 175gr | Nosler Custom Competition bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Alliant Reloder-26 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% | 55,056 psi | 86% | 2959 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,246 psi | 88% | 2992 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,550 psi | 89% | 3110 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 94% | 57,392 psi | 90% | 3110 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 82% | 57,261 psi | 90% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,116 psi | 90% | 3051 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 54,853 psi | 86% | 3051 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 2940 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,903 psi | 69% | 2900 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,217 psi | 90% | 3045 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,217 psi | 90% | 3045 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,246 psi | 90% | 3051 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,447 psi | 85% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,507 psi | 89% | 3035 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,839 psi | 86% | 3045 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,014 psi | 88% | 3022 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,507 psi | 89% | 3110 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,739 psi | 89% | 3009 fps | 95.9% |
| Bofors RP15 | <<locked>> | 98% | 57,580 psi | 90% | 3091 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 3015 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 54,839 psi | 86% | 3045 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 55,071 psi | 86% | 2936 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 3038 fps | 99% |
| Hodgdon H414 | <<locked>> | 84% | 54,288 psi | 85% | 2989 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 57,000 psi | 89% | 3005 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 54,708 psi | 86% | 2989 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,421 psi | 90% | 3031 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,493 psi | 90% | 2969 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,288 psi | 85% | 3153 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 54,578 psi | 86% | 3025 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1886 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,710 psi | 89% | 2979 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,521 psi | 89% | 2963 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 56,652 psi | 89% | 2986 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,883 psi | 88% | 2976 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 56,376 psi | 88% | 3091 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 57,174 psi | 90% | 2963 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,332 psi | 87% | 2956 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 2976 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,682 psi | 90% | 3035 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,363 psi | 62% | 2815 fps | 97.2% |
| Norma MRP | <<locked>> | 92% | 54,737 psi | 86% | 3071 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,723 psi | 86% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,290 psi | 90% | 3114 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 57,174 psi | 90% | 3035 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,593 psi | 87% | 3041 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,956 psi | 59% | 1932 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,434 psi | 88% | 3018 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,607 psi | 86% | 3045 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3146 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 3022 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 82% | 56,391 psi | 88% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,621 psi | 86% | 2959 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 56,057 psi | 88% | 3025 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 55,071 psi | 86% | 2936 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,174 psi | 90% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,332 psi | 87% | 2956 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,028 psi | 88% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,492 psi | 89% | 2917 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,622 psi | 87% | 3022 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 55,985 psi | 88% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,144 psi | 88% | 2949 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 55,172 psi | 86% | 2979 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,637 psi | 89% | 2999 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 57,159 psi | 90% | 2904 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,434 psi | 88% | 2969 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,260 psi | 88% | 2979 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 55,724 psi | 87% | 2972 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,650 psi | 86% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,592 psi | 86% | 3061 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 98% | 54,433 psi | 85% | 3041 fps | 98.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 3028 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,999 psi | 88% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,476 psi | 85% | 2992 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,621 psi | 84% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,608 psi | 89% | 2995 fps | 99.3% |
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% | 34,229 psi | 54% | 2552 fps | 96.7% |
| Accurate 4350 | <<locked>> | 80% | 45,890 psi | 72% | 2822 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 42,728 psi | 67% | 2844 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 88% | 46,485 psi | 73% | 2910 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 53,664 psi | 84% | 2897 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,203 psi | 60% | 2680 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 44,657 psi | 70% | 2858 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 42,960 psi | 67% | 2812 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 33,852 psi | 53% | 2644 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,624 psi | 61% | 2687 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,624 psi | 61% | 2687 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,961 psi | 69% | 2828 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,792 psi | 80% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,276 psi | 60% | 2677 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,204 psi | 61% | 2740 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,866 psi | 52% | 2582 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,589 psi | 48% | 2543 fps | 95.8% |
| Alliant Reloder-26 | 76 gr | 80% | 35,897 psi | 56% | 2720 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,243 psi | 83% | 2949 fps | 95% |
| Bofors RP15 | <<locked>> | 86% | 38,812 psi | 61% | 2730 fps | 95.4% |
| Bofors RP30 | <<locked>> | 94% | 41,829 psi | 66% | 2825 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 39,204 psi | 61% | 2740 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,515 psi | 76% | 2825 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 41,162 psi | 65% | 2776 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 47,572 psi | 75% | 2871 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 50,082 psi | 78% | 2887 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 44,614 psi | 70% | 2802 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,847 psi | 73% | 2844 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,437 psi | 65% | 2707 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,347 psi | 57% | 2746 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 47,079 psi | 74% | 2890 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,932 psi | 69% | 2749 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,922 psi | 78% | 2851 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 43,729 psi | 69% | 2766 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,337 psi | 68% | 2740 fps | 95% |
| IMR 7828 SSC | <<locked>> | 88% | 42,931 psi | 67% | 2831 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,500 psi | 74% | 2802 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 45,701 psi | 72% | 2785 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 31,415 psi | 49% | 2480 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 43,961 psi | 69% | 2785 fps | 96.9% |
| Norma 217 | <<locked>> | 96% | 34,563 psi | 54% | 2690 fps | 95.1% |
| Norma MRP | 73.8 gr | 80% | 35,679 psi | 56% | 2680 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 44,889 psi | 70% | 2805 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 42,844 psi | 67% | 2841 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 43,787 psi | 69% | 2799 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 35,549 psi | 56% | 2644 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 45% | 1726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,818 psi | 72% | 2838 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,947 psi | 69% | 2854 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,607 psi | 56% | 2723 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,282 psi | 73% | 2949 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 52,779 psi | 83% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,337 psi | 66% | 2726 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 37,608 psi | 59% | 2664 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 48,515 psi | 76% | 2825 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,500 psi | 74% | 2802 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 45,701 psi | 72% | 2785 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,852 psi | 83% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,528 psi | 73% | 2746 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,304 psi | 58% | 2661 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 52,663 psi | 83% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,093 psi | 72% | 2772 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 41,916 psi | 66% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,218 psi | 60% | 2651 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 50,285 psi | 79% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,398 psi | 73% | 2802 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 37,840 psi | 59% | 2631 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 45,861 psi | 72% | 2805 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,840 psi | 58% | 2661 fps | 99.2% |
| Vihtavuori N560 | <<locked>> | 86% | 44,222 psi | 69% | 2864 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 92% | 44,280 psi | 69% | 2851 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 98% | 47,587 psi | 75% | 2959 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,513 psi | 71% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,572 psi | 75% | 2871 fps | 99.1% |
| Winchester StaBALL HD | 73 gr | 80% | 29,167 psi | 46% | 2589 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,972 psi | 63% | 2687 fps | 95.9% |
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 77 powders for .300 Norma Mag. loaded with the .308 | 175gr | Nosler Custom Competition. Hodgdon Retumbo delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,153 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 1:13.5 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, Alliant Reloder-26, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 175gr | Nosler Custom Competition 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.