Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 180gr | Winchester Silvertip bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Accurate High Country and ReloadSwiss RS 76.
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>> | 92% | 54,172 psi | 85% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,332 psi | 87% | 2943 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,593 psi | 87% | 3061 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 92% | 56,507 psi | 89% | 3061 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 90% | 55,927 psi | 88% | 2999 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 57,609 psi | 90% | 3064 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2963 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,369 psi | 73% | 2920 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,260 psi | 88% | 2999 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,101 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,334 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,593 psi | 87% | 2989 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,725 psi | 90% | 3058 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,492 psi | 87% | 2976 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,752 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,883 psi | 88% | 3064 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,376 psi | 87% | 2959 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 56,869 psi | 89% | 3045 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 3035 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 57,725 psi | 90% | 3058 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 57,130 psi | 90% | 2940 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3051 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 56,710 psi | 89% | 2995 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,521 psi | 87% | 2949 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 57,363 psi | 90% | 2999 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,275 psi | 88% | 2982 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,478 psi | 89% | 2923 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3169 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,450 psi | 90% | 3035 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 58% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,376 psi | 87% | 2927 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,187 psi | 86% | 2910 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 55,651 psi | 87% | 2936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,607 psi | 86% | 2923 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 94% | 55,622 psi | 87% | 3041 fps | 98.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,974 psi | 66% | 2818 fps | 96.1% |
| Lovex S065 | <<locked>> | 84% | 55,869 psi | 88% | 2910 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,624 psi | 90% | 2959 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,405 psi | 87% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,492 psi | 89% | 2982 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 42,221 psi | 66% | 2844 fps | 98.4% |
| Norma MRP | <<locked>> | 90% | 53,853 psi | 84% | 3018 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 57,174 psi | 90% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,507 psi | 89% | 3064 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 56,115 psi | 88% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,737 psi | 86% | 2995 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1916 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,288 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,493 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,447 psi | 85% | 3100 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3051 fps | 97.7% |
| Rottweil R 904 | <<locked>> | 90% | 57,029 psi | 89% | 2969 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 55,230 psi | 87% | 2979 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 57,130 psi | 90% | 2940 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,869 psi | 88% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,624 psi | 90% | 2959 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,013 psi | 86% | 2861 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,795 psi | 86% | 2976 fps | 99.4% |
| Somchem S361 | <<locked>> | 88% | 55,027 psi | 86% | 2904 fps | 98.1% |
| Somchem S365 | <<locked>> | 86% | 54,172 psi | 85% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,680 psi | 87% | 2949 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 55,825 psi | 87% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,419 psi | 87% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,216 psi | 87% | 2930 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 84% | 54,549 psi | 85% | 2920 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,682 psi | 90% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,464 psi | 90% | 3077 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 98% | 57,450 psi | 90% | 3054 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3054 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,650 psi | 86% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,913 psi | 89% | 2999 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,566 psi | 90% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,477 psi | 87% | 2946 fps | 99.4% |
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% | 36,085 psi | 57% | 2566 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 48,167 psi | 75% | 2828 fps | 100% |
| Accurate High Country | 77.5 gr | 82% | 42,105 psi | 66% | 2799 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 86% | 45,832 psi | 72% | 2864 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 40,030 psi | 63% | 2694 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 41,031 psi | 64% | 2746 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 92% | 39,639 psi | 62% | 2710 fps | 95% |
| ADI AR 2225 | <<locked>> | 90% | 33,402 psi | 52% | 2605 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,480 psi | 63% | 2697 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,006 psi | 72% | 2831 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,432 psi | 84% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,103 psi | 63% | 2690 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,479 psi | 60% | 2690 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,766 psi | 54% | 2595 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,095 psi | 47% | 2497 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,319 psi | 60% | 2740 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,069 psi | 82% | 2900 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 38,305 psi | 60% | 2684 fps | 95.7% |
| Bofors RP30 | <<locked>> | 90% | 38,783 psi | 61% | 2723 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 38,479 psi | 60% | 2690 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 50,488 psi | 79% | 2828 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 37,927 psi | 59% | 2674 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 49,676 psi | 78% | 2877 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 52,112 psi | 82% | 2894 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 43,816 psi | 69% | 2753 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,018 psi | 67% | 2740 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,555 psi | 68% | 2713 fps | 100% |
| Hodgdon Retumbo | 78.3 gr | 86% | 35,911 psi | 56% | 2707 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 49,603 psi | 78% | 2907 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 44% | 1673 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,803 psi | 72% | 2756 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,837 psi | 81% | 2854 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,818 psi | 72% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,438 psi | 67% | 2694 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 86% | 42,279 psi | 66% | 2785 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,233 psi | 61% | 2753 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 49,472 psi | 78% | 2802 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,674 psi | 75% | 2792 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 31,154 psi | 49% | 2441 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 46,108 psi | 72% | 2799 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 34,360 psi | 54% | 2654 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 37,782 psi | 59% | 2700 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 47,021 psi | 74% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,218 psi | 61% | 2730 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 45,977 psi | 72% | 2808 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 35,099 psi | 55% | 2605 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,196 psi | 76% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,427 psi | 73% | 2867 fps | 100% |
| ReloadSwiss RS 76 | 81.8 gr | 84% | 32,663 psi | 51% | 2608 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,847 psi | 72% | 2907 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 41,379 psi | 65% | 2677 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 39,537 psi | 62% | 2677 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 50,488 psi | 79% | 2828 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,472 psi | 78% | 2802 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,674 psi | 75% | 2792 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,356 psi | 76% | 2753 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,233 psi | 61% | 2671 fps | 96.2% |
| Somchem S361 | <<locked>> | 80% | 42,206 psi | 66% | 2667 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 44,208 psi | 69% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,030 psi | 63% | 2661 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 52,373 psi | 82% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,486 psi | 76% | 2805 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,737 psi | 54% | 2530 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,877 psi | 75% | 2808 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,899 psi | 61% | 2674 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 43,642 psi | 68% | 2818 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 88% | 40,901 psi | 64% | 2743 fps | 95% |
| Vihtavuori N568 | <<locked>> | 96% | 47,152 psi | 74% | 2920 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,630 psi | 75% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,864 psi | 78% | 2881 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,937 psi | 48% | 2615 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,637 psi | 57% | 2582 fps | 95.2% |
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 73 powders for .300 Norma Mag. loaded with the .308 | 180gr | Winchester Silvertip. Hodgdon Retumbo delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,169 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 180.0 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, Bofors RP30 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 High Country, ReloadSwiss RS 76 rank at the top here: for .300 Norma Mag. with the .308 | 180gr | Winchester Silvertip 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.