Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 190gr | Nosler AccuBond Long Range bullet and 70 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 76 and Vihtavuori N560.
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% | 56,420 psi | 88% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,406 psi | 90% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 55,013 psi | 86% | 2969 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 88% | 54,317 psi | 85% | 2904 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 56,043 psi | 88% | 2972 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2936 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,530 psi | 76% | 2897 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,665 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,624 psi | 90% | 2953 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,289 psi | 88% | 2966 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,653 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,305 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,288 psi | 85% | 2966 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,217 psi | 90% | 2930 fps | 97.2% |
| Bofors RP15 | <<locked>> | 94% | 55,274 psi | 87% | 2949 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3009 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 56,289 psi | 88% | 2966 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 55,405 psi | 87% | 2844 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 55,550 psi | 87% | 2959 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 55,085 psi | 86% | 2900 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,493 psi | 90% | 2910 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,709 psi | 87% | 2907 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,505 psi | 85% | 2887 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,766 psi | 86% | 2825 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,028 psi | 88% | 3077 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,521 psi | 87% | 2933 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,159 psi | 90% | 2887 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,782 psi | 89% | 2867 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,421 psi | 90% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,420 psi | 88% | 2887 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 92% | 53,998 psi | 85% | 2949 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,990 psi | 69% | 2799 fps | 97.4% |
| Lovex S065 | <<locked>> | 84% | 57,580 psi | 90% | 2864 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,825 psi | 87% | 2864 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,682 psi | 90% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,592 psi | 86% | 2887 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2825 fps | 99.2% |
| Norma MRP | <<locked>> | 90% | 56,246 psi | 88% | 2986 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,477 psi | 87% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,752 psi | 86% | 2969 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 84% | 54,389 psi | 85% | 2884 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,464 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,189 psi | 60% | 1867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,450 psi | 90% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,782 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,058 psi | 89% | 3074 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3028 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 88% | 55,259 psi | 87% | 2874 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 57,087 psi | 89% | 2940 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 55,405 psi | 87% | 2844 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,580 psi | 90% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,825 psi | 87% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,695 psi | 89% | 2818 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,666 psi | 89% | 2936 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 56,724 psi | 89% | 2867 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 56,347 psi | 88% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,580 psi | 90% | 2910 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,551 psi | 90% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,305 psi | 90% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,377 psi | 90% | 2897 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 56,376 psi | 88% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,260 psi | 88% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,869 psi | 88% | 2982 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 96% | 56,043 psi | 88% | 2966 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3028 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,637 psi | 89% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,288 psi | 87% | 2900 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,434 psi | 88% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,450 psi | 90% | 2907 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% | 37,739 psi | 59% | 2546 fps | 98.6% |
| Accurate 4350 | <<locked>> | 80% | 50,183 psi | 79% | 2792 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,454 psi | 70% | 2776 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 41,669 psi | 65% | 2667 fps | 97.4% |
| ADI AR 2213 | <<locked>> | 82% | 39,871 psi | 62% | 2661 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 38,566 psi | 60% | 2628 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 86% | 30,632 psi | 48% | 2467 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,950 psi | 75% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,727 psi | 65% | 2664 fps | 97.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,492 psi | 59% | 2605 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,303 psi | 57% | 2566 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,444 psi | 49% | 2484 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,277 psi | 63% | 2717 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,531 psi | 79% | 2812 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 34,998 psi | 55% | 2543 fps | 95.1% |
| Bofors RP30 | <<locked>> | 88% | 37,971 psi | 60% | 2644 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 37,492 psi | 59% | 2605 fps | 96.3% |
| Bofors RP7 | <<locked>> | 80% | 51,967 psi | 81% | 2789 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 36,782 psi | 58% | 2589 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 51,474 psi | 81% | 2838 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,780 psi | 84% | 2851 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 42,380 psi | 66% | 2664 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,771 psi | 65% | 2651 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,121 psi | 71% | 2674 fps | 100% |
| Hodgdon Retumbo | 76.1 gr | 84% | 35,056 psi | 55% | 2628 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 51,619 psi | 81% | 2871 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,442 psi | 74% | 2723 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,345 psi | 84% | 2812 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 47,456 psi | 74% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,249 psi | 65% | 2608 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 82% | 38,435 psi | 60% | 2638 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,464 psi | 60% | 2677 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,937 psi | 80% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,356 psi | 77% | 2756 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 32,445 psi | 51% | 2418 fps | 97.1% |
| Norma 204 | <<locked>> | 80% | 47,732 psi | 75% | 2766 fps | 98.6% |
| Norma 217 | <<locked>> | 90% | 31,575 psi | 49% | 2520 fps | 95% |
| Norma MRP | <<locked>> | 80% | 39,494 psi | 62% | 2677 fps | 98.2% |
| Norma URP | <<locked>> | 80% | 48,849 psi | 77% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,072 psi | 60% | 2644 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,645 psi | 75% | 2772 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 82% | 33,982 psi | 53% | 2520 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 45% | 1670 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,067 psi | 78% | 2812 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,167 psi | 75% | 2828 fps | 100% |
| ReloadSwiss RS 76 | 79.5 gr | 82% | 31,850 psi | 50% | 2533 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,466 psi | 65% | 2753 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 42,772 psi | 67% | 2644 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 41,060 psi | 64% | 2651 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 80% | 51,967 psi | 81% | 2789 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,937 psi | 80% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,356 psi | 77% | 2756 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,835 psi | 78% | 2713 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,727 psi | 64% | 2644 fps | 97.3% |
| Somchem S361 | <<locked>> | 80% | 43,497 psi | 68% | 2635 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 46,180 psi | 72% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,553 psi | 65% | 2631 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 80% | 54,172 psi | 85% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,314 psi | 79% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,216 psi | 57% | 2507 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 80% | 49,530 psi | 78% | 2769 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,538 psi | 64% | 2641 fps | 100% |
| Vihtavuori N560 | 77.1 gr | 82% | 42,424 psi | 66% | 2730 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 40,016 psi | 63% | 2664 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,977 psi | 72% | 2835 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,356 psi | 77% | 2723 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,619 psi | 81% | 2844 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,851 psi | 51% | 2598 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,101 psi | 60% | 2559 fps | 96.4% |
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 | 190gr | Nosler AccuBond Long Range. Hodgdon Retumbo delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,077 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 190.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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 76, Vihtavuori N560 rank at the top here: for .300 Norma Mag. with the .308 | 190gr | Nosler AccuBond Long Range they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.