Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 200gr | Barnes X S bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N570.
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>> | 88% | 55,796 psi | 87% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,435 psi | 90% | 2930 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 56,028 psi | 88% | 2851 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 53,983 psi | 85% | 2861 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 98% | 56,043 psi | 88% | 2890 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2927 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2920 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,289 psi | 88% | 2848 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,391 psi | 88% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,724 psi | 87% | 2841 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,839 psi | 86% | 2864 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,579 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,144 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,246 psi | 90% | 2923 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2989 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,708 psi | 86% | 2818 fps | 97.3% |
| Bofors RP15 | <<locked>> | 92% | 57,740 psi | 90% | 2907 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 56,304 psi | 88% | 2913 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 54,839 psi | 86% | 2864 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 57,566 psi | 90% | 2913 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 57,334 psi | 90% | 2854 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,159 psi | 88% | 2838 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,739 psi | 89% | 2766 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,013 psi | 86% | 2976 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1785 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,143 psi | 86% | 2776 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,115 psi | 88% | 2785 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,433 psi | 85% | 2779 fps | 99% |
| IMR 7828 SSC | <<locked>> | 90% | 56,072 psi | 88% | 2904 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,444 psi | 79% | 2841 fps | 99.1% |
| Lovex S070 | <<locked>> | 82% | 57,725 psi | 90% | 2808 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,319 psi | 90% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,130 psi | 88% | 2831 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 51,343 psi | 80% | 2871 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,795 psi | 86% | 2881 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,406 psi | 90% | 2822 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,246 psi | 90% | 2927 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 56,188 psi | 88% | 2831 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,854 psi | 88% | 2861 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 61% | 1827 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,580 psi | 90% | 2890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,608 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,274 psi | 87% | 2936 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 86% | 56,782 psi | 89% | 2818 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 55,666 psi | 87% | 2838 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 57,725 psi | 90% | 2808 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,259 psi | 87% | 2831 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 54,665 psi | 86% | 2759 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 55,259 psi | 87% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,202 psi | 88% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,782 psi | 87% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 55,738 psi | 87% | 2815 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,230 psi | 85% | 2877 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 55,347 psi | 87% | 2874 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 96% | 55,956 psi | 88% | 2936 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 98% | 56,811 psi | 89% | 2992 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,898 psi | 88% | 2923 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,651 psi | 87% | 2802 fps | 99.8% |
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% | 43,482 psi | 68% | 2579 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 44,048 psi | 69% | 2690 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 46,296 psi | 73% | 2687 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 41,829 psi | 66% | 2631 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 84% | 36,129 psi | 57% | 2500 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 49,008 psi | 77% | 2858 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 29,544 psi | 46% | 2365 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,789 psi | 73% | 2687 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,924 psi | 83% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,369 psi | 73% | 2680 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,699 psi | 67% | 2644 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,539 psi | 65% | 2592 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,129 psi | 57% | 2530 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,456 psi | 73% | 2753 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,630 psi | 73% | 2795 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,788 psi | 72% | 2651 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 39,914 psi | 63% | 2582 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 36,158 psi | 57% | 2526 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,699 psi | 67% | 2644 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 80% | 34,389 psi | 54% | 2457 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 44,266 psi | 69% | 2628 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,627 psi | 68% | 2615 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,169 psi | 79% | 2671 fps | 100% |
| Hodgdon Retumbo | 72.4 gr | 80% | 35,375 psi | 55% | 2566 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,587 psi | 45% | 1594 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,895 psi | 81% | 2723 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 52,765 psi | 83% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,455 psi | 71% | 2621 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 40,596 psi | 64% | 2615 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,912 psi | 58% | 2566 fps | 95.7% |
| Lovex S070 | <<locked>> | 80% | 54,375 psi | 85% | 2756 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,058 psi | 60% | 2470 fps | 99.1% |
| Norma 204 | <<locked>> | 80% | 52,518 psi | 82% | 2772 fps | 99.6% |
| Norma 217 | <<locked>> | 84% | 30,966 psi | 49% | 2431 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 45,005 psi | 71% | 2710 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 54,012 psi | 85% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,553 psi | 64% | 2625 fps | 97% |
| Ramshot Hunter | <<locked>> | 80% | 52,678 psi | 83% | 2776 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,825 psi | 58% | 2516 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,283 psi | 46% | 1631 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,838 psi | 84% | 2835 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,606 psi | 54% | 2543 fps | 97.8% |
| ReloadSwiss RS 80 | 85.9 gr | 88% | 41,713 psi | 65% | 2687 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 47,384 psi | 74% | 2661 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 46,093 psi | 72% | 2674 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 54,375 psi | 85% | 2756 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,730 psi | 72% | 2667 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 48,283 psi | 76% | 2651 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 51,837 psi | 81% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,876 psi | 73% | 2654 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 80% | 40,944 psi | 64% | 2536 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 46,470 psi | 73% | 2671 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,643 psi | 70% | 2700 fps | 97.2% |
| Vihtavuori N565 | <<locked>> | 80% | 37,869 psi | 59% | 2539 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 88% | 42,931 psi | 67% | 2697 fps | 95.7% |
| Vihtavuori N570 | 88.3 gr | 94% | 49,763 psi | 78% | 2867 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,088 psi | 61% | 2651 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,917 psi | 67% | 2582 fps | 98.3% |
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 58 powders for .300 Norma Mag. loaded with the .308 | 200gr | Barnes X S. Vihtavuori N570 delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,785 fps to 2,992 fps. ADI AR 2218 gives the best case fill at 100 %, and 58 of the 58 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for .300 Norma Mag. with the .308 | 200gr | Barnes X S 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.