Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 201gr | RWS UNI Classic bullet and 65 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 ReloadSwiss RS 80.
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>> | 90% | 56,797 psi | 89% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,508 psi | 90% | 2831 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,593 psi | 87% | 2913 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 86% | 54,650 psi | 86% | 2844 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 56,434 psi | 88% | 2913 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 98% | 54,839 psi | 86% | 2887 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 2913 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,071 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,230 psi | 85% | 2831 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,797 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,839 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,766 psi | 86% | 2887 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,288 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,188 psi | 88% | 2972 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,116 psi | 90% | 2871 fps | 97.9% |
| Bofors RP15 | <<locked>> | 92% | 56,188 psi | 88% | 2897 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 54,462 psi | 85% | 2897 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 56,797 psi | 89% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,405 psi | 88% | 2910 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,869 psi | 88% | 2848 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,868 psi | 86% | 2831 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,027 psi | 86% | 2756 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,508 psi | 90% | 3028 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 1791 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,276 psi | 90% | 2822 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,128 psi | 85% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,391 psi | 88% | 2825 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 90% | 54,752 psi | 86% | 2894 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2818 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 57,479 psi | 90% | 2795 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,854 psi | 88% | 2799 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,839 psi | 86% | 2785 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,694 psi | 86% | 2825 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 49,327 psi | 77% | 2844 fps | 100% |
| Norma MRP | <<locked>> | 88% | 56,884 psi | 89% | 2923 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,738 psi | 87% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,724 psi | 87% | 2917 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 54,621 psi | 86% | 2822 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,085 psi | 85% | 2848 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,522 psi | 60% | 1834 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,217 psi | 88% | 2884 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,186 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,522 psi | 90% | 2982 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 55,390 psi | 87% | 2815 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 57,682 psi | 90% | 2881 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,479 psi | 90% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,854 psi | 88% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,391 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,276 psi | 90% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,710 psi | 89% | 2808 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 57,043 psi | 89% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,346 psi | 85% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,203 psi | 90% | 2802 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,056 psi | 85% | 2782 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,681 psi | 89% | 2854 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 82% | 56,492 psi | 89% | 2808 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,942 psi | 89% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,405 psi | 88% | 2923 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 57,000 psi | 89% | 2913 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 96% | 54,186 psi | 85% | 2917 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 98% | 55,288 psi | 87% | 2976 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,594 psi | 89% | 2756 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,143 psi | 85% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 53,925 psi | 85% | 2792 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% | 40,814 psi | 64% | 2546 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 53,882 psi | 84% | 2779 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,090 psi | 66% | 2664 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 44,788 psi | 70% | 2671 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,089 psi | 63% | 2608 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 36,535 psi | 57% | 2530 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 98% | 47,485 psi | 74% | 2841 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 82% | 29,109 psi | 46% | 2369 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,387 psi | 81% | 2779 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,759 psi | 70% | 2664 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,756 psi | 64% | 2615 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,523 psi | 62% | 2566 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,098 psi | 53% | 2497 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,179 psi | 69% | 2723 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,196 psi | 76% | 2835 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,442 psi | 74% | 2703 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 37,942 psi | 59% | 2552 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 36,303 psi | 57% | 2543 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 40,756 psi | 64% | 2615 fps | 98% |
| Hodgdon H1000 | <<locked>> | 82% | 34,766 psi | 54% | 2484 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 80% | 42,728 psi | 67% | 2612 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,945 psi | 66% | 2595 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,544 psi | 76% | 2661 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 80% | 33,315 psi | 52% | 2523 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,502 psi | 79% | 2713 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 50,821 psi | 80% | 2720 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,961 psi | 69% | 2605 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 38,812 psi | 61% | 2589 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,985 psi | 58% | 2579 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 54,085 psi | 85% | 2746 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,562 psi | 82% | 2746 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,244 psi | 55% | 2428 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 51,126 psi | 80% | 2766 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 30,429 psi | 48% | 2428 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 43,033 psi | 67% | 2684 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 52,286 psi | 82% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,682 psi | 61% | 2598 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 51,140 psi | 80% | 2766 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,635 psi | 54% | 2480 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 45% | 1637 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,286 psi | 82% | 2825 fps | 100% |
| ReloadSwiss RS 76 | 79.7 gr | 80% | 32,329 psi | 51% | 2497 fps | 97% |
| ReloadSwiss RS 80 | 88.4 gr | 88% | 39,494 psi | 62% | 2648 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 45,701 psi | 72% | 2644 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 44,266 psi | 69% | 2654 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,085 psi | 85% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,562 psi | 82% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,837 psi | 83% | 2697 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,918 psi | 69% | 2648 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 46,572 psi | 73% | 2638 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 49,922 psi | 78% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,759 psi | 70% | 2635 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 53,722 psi | 84% | 2753 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,015 psi | 61% | 2510 fps | 98% |
| Vihtavuori N170 | <<locked>> | 94% | 52,910 psi | 83% | 2792 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 52,982 psi | 83% | 2756 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,947 psi | 69% | 2638 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,859 psi | 67% | 2677 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 38,014 psi | 60% | 2559 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 40,886 psi | 64% | 2664 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 94% | 47,834 psi | 75% | 2841 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,852 psi | 83% | 2707 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,941 psi | 58% | 2612 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,118 psi | 64% | 2562 fps | 98% |
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 71 powders for .300 Norma Mag. loaded with the .308 | 201gr | RWS UNI Classic. Hodgdon Retumbo delivers the highest muzzle velocity at 3,028 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,028 fps. Accurate 8700 gives the best case fill at 100 %, and 71 of the 71 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 201.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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, ReloadSwiss RS 80 rank at the top here: for .300 Norma Mag. with the .308 | 201gr | RWS UNI Classic they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, 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.