Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 185gr | Berger Juggernaut Target bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Hodgdon Retumbo and Winchester StaBALL HD.
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% | 56,971 psi | 89% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,317 psi | 85% | 2887 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,665 psi | 86% | 3005 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 92% | 55,535 psi | 87% | 3009 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 55,027 psi | 86% | 2946 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 56,724 psi | 89% | 3012 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2910 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,498 psi | 71% | 2864 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,405 psi | 87% | 2943 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,274 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,405 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,766 psi | 86% | 2936 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,811 psi | 89% | 3005 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,433 psi | 85% | 2920 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,694 psi | 86% | 3009 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,592 psi | 86% | 2907 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 55,767 psi | 87% | 2986 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 2976 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 56,811 psi | 89% | 3005 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 56,565 psi | 89% | 2890 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 2999 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 55,854 psi | 88% | 2940 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,969 psi | 86% | 2900 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 56,449 psi | 88% | 2946 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,390 psi | 87% | 2930 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,535 psi | 87% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,434 psi | 88% | 2979 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,752 psi | 86% | 2877 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,375 psi | 85% | 2858 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 54,795 psi | 86% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,435 psi | 90% | 2930 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 54,520 psi | 85% | 2986 fps | 98.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,002 psi | 64% | 2762 fps | 96% |
| Lovex S065 | <<locked>> | 84% | 55,114 psi | 86% | 2858 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,942 psi | 89% | 2907 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,418 psi | 85% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,564 psi | 87% | 2930 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 41,191 psi | 65% | 2792 fps | 98.3% |
| Norma MRP | <<locked>> | 92% | 56,652 psi | 89% | 3025 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,463 psi | 88% | 2927 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,230 psi | 87% | 3009 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 55,187 psi | 86% | 2930 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,664 psi | 84% | 2940 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 1877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,302 psi | 85% | 2910 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,565 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,025 psi | 82% | 2992 fps | 97.6% |
| Rottweil R 904 | <<locked>> | 90% | 56,347 psi | 88% | 2917 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 54,317 psi | 85% | 2923 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 56,565 psi | 89% | 2890 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,114 psi | 86% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,942 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,551 psi | 90% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,331 psi | 85% | 2812 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,435 psi | 90% | 2976 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 57,493 psi | 90% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,099 psi | 85% | 2851 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 57,000 psi | 89% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,665 psi | 86% | 2897 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 55,201 psi | 87% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,491 psi | 85% | 2864 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,375 psi | 85% | 2877 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,305 psi | 90% | 2920 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,521 psi | 89% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,420 psi | 88% | 3022 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 56,420 psi | 88% | 3002 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2995 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,725 psi | 90% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,072 psi | 88% | 2943 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,130 psi | 88% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,418 psi | 85% | 2890 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% | 35,476 psi | 56% | 2520 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 47,413 psi | 74% | 2776 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 41,321 psi | 65% | 2746 fps | 95.8% |
| Accurate MAGPRO | 79.9 gr | 86% | 44,904 psi | 70% | 2812 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 39,407 psi | 62% | 2644 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 40,306 psi | 63% | 2694 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 41,626 psi | 65% | 2720 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 90% | 32,837 psi | 51% | 2556 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,871 psi | 62% | 2651 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,368 psi | 71% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,417 psi | 82% | 2897 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,508 psi | 62% | 2644 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,956 psi | 59% | 2644 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,084 psi | 53% | 2546 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,573 psi | 46% | 2451 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,492 psi | 59% | 2690 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,416 psi | 81% | 2851 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 37,637 psi | 59% | 2635 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 38,029 psi | 60% | 2674 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 37,956 psi | 59% | 2644 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 49,806 psi | 78% | 2779 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,740 psi | 62% | 2684 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 48,907 psi | 77% | 2825 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,503 psi | 81% | 2841 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 43,105 psi | 68% | 2703 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,279 psi | 66% | 2687 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,772 psi | 67% | 2661 fps | 100% |
| Hodgdon Retumbo | 75.6 gr | 86% | 35,288 psi | 55% | 2657 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 48,689 psi | 76% | 2851 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 44% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,165 psi | 71% | 2707 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,198 psi | 80% | 2805 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,107 psi | 71% | 2720 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,930 psi | 66% | 2644 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 86% | 41,568 psi | 65% | 2736 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,392 psi | 60% | 2703 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,776 psi | 76% | 2749 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,166 psi | 74% | 2743 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,574 psi | 48% | 2395 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 45,382 psi | 71% | 2749 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 33,649 psi | 53% | 2605 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 37,101 psi | 58% | 2651 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 46,470 psi | 73% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 38,551 psi | 60% | 2677 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 45,252 psi | 71% | 2759 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,389 psi | 54% | 2556 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 45% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,442 psi | 74% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,585 psi | 71% | 2815 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,082 psi | 50% | 2562 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,672 psi | 70% | 2851 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 40,756 psi | 64% | 2628 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,899 psi | 61% | 2628 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 49,806 psi | 78% | 2779 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,776 psi | 76% | 2749 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,166 psi | 74% | 2743 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,056 psi | 85% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,776 psi | 75% | 2700 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,566 psi | 60% | 2625 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 54,041 psi | 85% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,324 psi | 69% | 2674 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 43,482 psi | 68% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,494 psi | 62% | 2612 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 51,851 psi | 81% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,805 psi | 75% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,156 psi | 54% | 2484 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 47,108 psi | 74% | 2756 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,305 psi | 60% | 2628 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 42,743 psi | 67% | 2766 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 42,975 psi | 67% | 2756 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 96% | 46,006 psi | 72% | 2864 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,876 psi | 73% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,095 psi | 77% | 2828 fps | 99.5% |
| Winchester StaBALL HD | 72.2 gr | 80% | 30,327 psi | 48% | 2566 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,013 psi | 56% | 2533 fps | 95.1% |
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 75 powders for .300 Norma Mag. loaded with the .308 | 185gr | Berger Juggernaut Target. Hodgdon Retumbo delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,114 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 185.0 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. Accurate MAGPRO, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for .300 Norma Mag. with the .308 | 185gr | Berger Juggernaut Target 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.