Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 185gr | Berger JUG bullet and 76 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 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>> | 94% | 57,043 psi | 89% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,375 psi | 85% | 2887 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,679 psi | 86% | 3005 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 92% | 55,550 psi | 87% | 3009 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 55,303 psi | 87% | 2949 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 56,811 psi | 89% | 3012 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 2910 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2867 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,463 psi | 87% | 2946 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,463 psi | 87% | 2946 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,332 psi | 87% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,449 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,810 psi | 86% | 2936 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,869 psi | 89% | 3005 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,462 psi | 85% | 2923 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,781 psi | 86% | 3009 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,810 psi | 86% | 2910 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 55,811 psi | 87% | 2989 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 2979 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 56,869 psi | 89% | 3005 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 56,608 psi | 89% | 2890 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 2999 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 56,130 psi | 88% | 2946 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,013 psi | 86% | 2900 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 56,521 psi | 89% | 2946 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,463 psi | 87% | 2927 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,593 psi | 87% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,376 psi | 88% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,521 psi | 89% | 2979 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 58% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,824 psi | 86% | 2877 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,476 psi | 85% | 2858 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 54,839 psi | 86% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,450 psi | 90% | 2930 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 54,563 psi | 86% | 2986 fps | 98.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,031 psi | 64% | 2762 fps | 96% |
| Lovex S065 | <<locked>> | 84% | 55,172 psi | 86% | 2858 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,985 psi | 89% | 2910 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,433 psi | 85% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,608 psi | 87% | 2930 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 41,220 psi | 65% | 2792 fps | 98.3% |
| Norma MRP | <<locked>> | 92% | 56,710 psi | 89% | 3025 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,507 psi | 89% | 2927 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,288 psi | 87% | 3009 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 55,245 psi | 87% | 2930 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,737 psi | 84% | 2940 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1880 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,346 psi | 85% | 2910 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,652 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,301 psi | 82% | 2995 fps | 97.6% |
| Rottweil R 904 | <<locked>> | 90% | 56,376 psi | 88% | 2917 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 54,346 psi | 85% | 2923 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 56,608 psi | 89% | 2890 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,172 psi | 86% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,985 psi | 89% | 2910 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,609 psi | 90% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,346 psi | 85% | 2812 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,522 psi | 90% | 2976 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 57,551 psi | 90% | 2881 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,302 psi | 85% | 2854 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 57,072 psi | 89% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,752 psi | 86% | 2897 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 55,259 psi | 87% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,534 psi | 85% | 2864 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,418 psi | 85% | 2877 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,363 psi | 90% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,782 psi | 89% | 2953 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,434 psi | 88% | 3022 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 56,420 psi | 88% | 3002 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2999 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,911 psi | 84% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,130 psi | 88% | 2946 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,434 psi | 88% | 3061 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,679 psi | 86% | 2894 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% | 35,520 psi | 56% | 2523 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 47,471 psi | 74% | 2776 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 41,365 psi | 65% | 2749 fps | 95.8% |
| Accurate MAGPRO | 80 gr | 86% | 44,933 psi | 70% | 2812 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 39,624 psi | 62% | 2651 fps | 96.4% |
| ADI AR 2213 | <<locked>> | 84% | 40,364 psi | 63% | 2697 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 41,684 psi | 65% | 2723 fps | 96% |
| ADI AR 2225 | <<locked>> | 90% | 32,880 psi | 52% | 2556 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,914 psi | 63% | 2648 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,914 psi | 63% | 2648 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,426 psi | 71% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,678 psi | 83% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,552 psi | 62% | 2641 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,000 psi | 60% | 2644 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,127 psi | 53% | 2549 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,747 psi | 47% | 2454 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,536 psi | 59% | 2690 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,416 psi | 81% | 2851 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 37,681 psi | 59% | 2638 fps | 95.7% |
| Bofors RP30 | <<locked>> | 90% | 38,058 psi | 60% | 2677 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 38,000 psi | 60% | 2644 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 49,850 psi | 78% | 2779 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,929 psi | 63% | 2687 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 49,153 psi | 77% | 2828 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,547 psi | 81% | 2841 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 43,134 psi | 68% | 2703 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,322 psi | 66% | 2687 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,830 psi | 67% | 2661 fps | 100% |
| Hodgdon Retumbo | 75.7 gr | 86% | 35,317 psi | 55% | 2657 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 48,733 psi | 76% | 2851 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,397 psi | 71% | 2710 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,256 psi | 80% | 2802 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,165 psi | 71% | 2720 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,959 psi | 66% | 2648 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 86% | 41,611 psi | 65% | 2736 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,406 psi | 60% | 2703 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,834 psi | 77% | 2753 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,224 psi | 74% | 2746 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,632 psi | 48% | 2395 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,426 psi | 71% | 2749 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 33,678 psi | 53% | 2605 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 37,144 psi | 58% | 2654 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 46,528 psi | 73% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 38,580 psi | 60% | 2680 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 45,295 psi | 71% | 2759 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,418 psi | 54% | 2559 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,500 psi | 74% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,643 psi | 72% | 2815 fps | 100% |
| ReloadSwiss RS 76 | 79.1 gr | 84% | 32,111 psi | 50% | 2562 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,875 psi | 70% | 2858 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 40,799 psi | 64% | 2628 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,943 psi | 61% | 2631 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 49,850 psi | 78% | 2779 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,834 psi | 77% | 2753 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,224 psi | 74% | 2746 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,114 psi | 85% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,819 psi | 75% | 2700 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,609 psi | 61% | 2625 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 54,099 psi | 85% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,527 psi | 70% | 2677 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 43,685 psi | 68% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,537 psi | 62% | 2615 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 51,909 psi | 81% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,863 psi | 75% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,229 psi | 54% | 2487 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,340 psi | 74% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,363 psi | 60% | 2628 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 42,830 psi | 67% | 2769 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 43,018 psi | 67% | 2759 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 96% | 46,064 psi | 72% | 2864 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,094 psi | 74% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,153 psi | 77% | 2828 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,385 psi | 48% | 2569 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,056 psi | 56% | 2536 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 76 powders for .300 Norma Mag. loaded with the .308 | 185gr | Berger JUG. 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 76 of the 76 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. Hodgdon Retumbo, Accurate MAGPRO, ReloadSwiss RS 76 rank at the top here: for .300 Norma Mag. with the .308 | 185gr | Berger JUG 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.