Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 225gr | Hornady ELD-Match bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo 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>> | 88% | 54,882 psi | 86% | 2631 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,537 psi | 90% | 2792 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 56,376 psi | 88% | 2713 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 54,563 psi | 86% | 2726 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 56,478 psi | 89% | 2759 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,591 psi | 82% | 2808 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,911 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,681 psi | 89% | 2694 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,927 psi | 88% | 2703 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,027 psi | 86% | 2726 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,768 psi | 89% | 2684 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,608 psi | 89% | 2756 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,276 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,896 psi | 84% | 2792 fps | 98.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 49,458 psi | 78% | 2717 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,172 psi | 86% | 2697 fps | 98.4% |
| Bofors RP15 | <<locked>> | 90% | 54,244 psi | 85% | 2710 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 56,333 psi | 88% | 2772 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 55,027 psi | 86% | 2726 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 54,346 psi | 85% | 2726 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,609 psi | 90% | 2720 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,536 psi | 89% | 2703 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,739 psi | 89% | 2621 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,637 psi | 87% | 2838 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,739 psi | 59% | 1677 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,201 psi | 87% | 2638 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,767 psi | 87% | 2638 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,520 psi | 85% | 2644 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 90% | 56,623 psi | 89% | 2766 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,372 psi | 79% | 2703 fps | 99.7% |
| Lovex S070 | <<locked>> | 82% | 57,392 psi | 90% | 2661 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,536 psi | 89% | 2654 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,246 psi | 88% | 2690 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 2726 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,839 psi | 86% | 2736 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,348 psi | 90% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 53,824 psi | 84% | 2733 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 56,217 psi | 88% | 2687 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,101 psi | 88% | 2723 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 1719 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,173 psi | 88% | 2831 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,361 psi | 87% | 2799 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 86% | 56,913 psi | 89% | 2684 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 55,637 psi | 87% | 2697 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,392 psi | 90% | 2661 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,245 psi | 87% | 2690 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 54,578 psi | 86% | 2628 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 55,071 psi | 86% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,970 psi | 88% | 2667 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,796 psi | 87% | 2657 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 54,636 psi | 86% | 2677 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 86% | 55,129 psi | 86% | 2661 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,375 psi | 85% | 2740 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 92% | 55,056 psi | 86% | 2736 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 56,144 psi | 88% | 2799 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 98% | 57,319 psi | 90% | 2861 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,275 psi | 88% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,709 psi | 87% | 2667 fps | 100% |
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% | 42,134 psi | 66% | 2434 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,482 psi | 68% | 2552 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 46,122 psi | 72% | 2552 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 41,452 psi | 65% | 2500 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 33,054 psi | 52% | 2316 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 96% | 45,629 psi | 72% | 2674 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 28,282 psi | 44% | 2231 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,156 psi | 83% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,079 psi | 72% | 2546 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,148 psi | 66% | 2507 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,959 psi | 64% | 2448 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,302 psi | 55% | 2395 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,050 psi | 72% | 2605 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 43,337 psi | 68% | 2605 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 98% | 45,905 psi | 72% | 2651 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 42,931 psi | 67% | 2477 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 39,320 psi | 62% | 2448 fps | 98.4% |
| Bofors RP30 | <<locked>> | 80% | 32,880 psi | 52% | 2329 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,148 psi | 66% | 2507 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 33,547 psi | 53% | 2329 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 43,947 psi | 69% | 2497 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,294 psi | 68% | 2487 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,908 psi | 78% | 2530 fps | 100% |
| Hodgdon Retumbo | 70.4 gr | 80% | 34,548 psi | 54% | 2431 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,340 psi | 44% | 1496 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,750 psi | 81% | 2585 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,417 psi | 82% | 2592 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,078 psi | 71% | 2490 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 40,147 psi | 63% | 2484 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 33,649 psi | 53% | 2372 fps | 95.8% |
| Lovex S070 | <<locked>> | 80% | 53,998 psi | 85% | 2615 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,434 psi | 57% | 2323 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 52,605 psi | 82% | 2638 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 27,746 psi | 43% | 2234 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 44,672 psi | 70% | 2572 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 53,882 psi | 84% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,190 psi | 63% | 2497 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 52,678 psi | 83% | 2635 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,984 psi | 56% | 2382 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1535 fps | 100% |
| ReloadSwiss RS 76 | 75.3 gr | 80% | 33,547 psi | 53% | 2405 fps | 98.6% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 35,462 psi | 56% | 2428 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 47,021 psi | 74% | 2526 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 45,745 psi | 72% | 2536 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 53,998 psi | 85% | 2615 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,397 psi | 71% | 2533 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 47,892 psi | 75% | 2523 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 51,445 psi | 81% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,166 psi | 72% | 2516 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 40,248 psi | 63% | 2402 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 47,761 psi | 75% | 2566 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 45,585 psi | 71% | 2520 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,425 psi | 70% | 2569 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 36,796 psi | 58% | 2398 fps | 96.3% |
| Vihtavuori N568 | <<locked>> | 86% | 39,595 psi | 62% | 2503 fps | 95.9% |
| Vihtavuori N570 | 82.2 gr | 90% | 43,149 psi | 68% | 2612 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,711 psi | 61% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,380 psi | 66% | 2451 fps | 99% |
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 58 powders for .300 Norma Mag. loaded with the .308 | 225gr | Hornady ELD-Match. Vihtavuori N570 delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,861 fps. ADI AR 2218 gives the best case fill at 100 %, and 58 of the 58 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 225.0 gr projectile in 0.308" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Norma Mag. with the .308 | 225gr | Hornady ELD-Match 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.