Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 230gr | Hornady A-TIP bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 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% | 55,941 psi | 88% | 2618 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,723 psi | 86% | 2720 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 57,145 psi | 90% | 2697 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 55,463 psi | 87% | 2713 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 57,682 psi | 90% | 2749 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,766 psi | 84% | 2802 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2769 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,696 psi | 90% | 2677 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,710 psi | 89% | 2687 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,912 psi | 88% | 2707 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,682 psi | 90% | 2667 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 53,983 psi | 85% | 2690 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,447 psi | 85% | 2703 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,245 psi | 87% | 2785 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 2710 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,898 psi | 88% | 2680 fps | 98.7% |
| Bofors RP15 | <<locked>> | 90% | 55,303 psi | 87% | 2700 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 57,508 psi | 90% | 2762 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 55,912 psi | 88% | 2707 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 55,303 psi | 87% | 2713 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,650 psi | 86% | 2651 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,334 psi | 90% | 2690 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,725 psi | 90% | 2602 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,971 psi | 89% | 2828 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,869 psi | 88% | 2618 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,724 psi | 89% | 2621 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,216 psi | 87% | 2631 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 88% | 53,882 psi | 84% | 2700 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 94% | 57,101 psi | 89% | 2631 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,576 psi | 81% | 2697 fps | 99.9% |
| Lovex S071 | <<locked>> | 94% | 57,624 psi | 90% | 2641 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,188 psi | 90% | 2677 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 2713 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,970 psi | 88% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,027 psi | 86% | 2723 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,188 psi | 90% | 2671 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,101 psi | 89% | 2707 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,667 psi | 61% | 1699 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,595 psi | 90% | 2818 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,695 psi | 89% | 2792 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 84% | 54,172 psi | 85% | 2618 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 56,637 psi | 89% | 2680 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,231 psi | 88% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,477 psi | 87% | 2615 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 55,912 psi | 88% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,971 psi | 89% | 2654 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,623 psi | 89% | 2641 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,463 psi | 87% | 2667 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 86% | 56,202 psi | 88% | 2648 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,448 psi | 87% | 2730 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 56,217 psi | 88% | 2723 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 57,435 psi | 90% | 2789 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 54,520 psi | 85% | 2789 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,725 psi | 90% | 2759 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,492 psi | 89% | 2651 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% | 42,975 psi | 67% | 2421 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,396 psi | 70% | 2546 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 80% | 46,963 psi | 74% | 2539 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 42,105 psi | 66% | 2487 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 80% | 31,473 psi | 49% | 2254 fps | 95% |
| ADI AR 2218 | <<locked>> | 94% | 43,337 psi | 68% | 2602 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 28,892 psi | 45% | 2228 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,099 psi | 85% | 2631 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,891 psi | 73% | 2533 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,830 psi | 67% | 2493 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,800 psi | 66% | 2434 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,071 psi | 57% | 2385 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,934 psi | 74% | 2592 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 41,089 psi | 64% | 2536 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 43,627 psi | 68% | 2582 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 40,886 psi | 64% | 2411 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 39,958 psi | 63% | 2434 fps | 98.7% |
| Bofors RP30 | <<locked>> | 80% | 33,634 psi | 53% | 2326 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 42,830 psi | 67% | 2493 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 34,214 psi | 54% | 2323 fps | 97% |
| Hodgdon H4831 | <<locked>> | 80% | 44,744 psi | 70% | 2487 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,932 psi | 69% | 2474 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,807 psi | 80% | 2513 fps | 100% |
| Hodgdon Retumbo | 70.4 gr | 80% | 35,288 psi | 55% | 2428 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1483 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,576 psi | 82% | 2569 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,142 psi | 83% | 2572 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,803 psi | 72% | 2477 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 40,973 psi | 64% | 2474 fps | 98.2% |
| IMR 7977 Enduron | <<locked>> | 92% | 53,664 psi | 84% | 2582 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 32,256 psi | 51% | 2316 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 37,130 psi | 58% | 2313 fps | 99.7% |
| Norma 204 | <<locked>> | 80% | 53,519 psi | 84% | 2625 fps | 100% |
| Norma 217 | <<locked>> | 82% | 28,340 psi | 44% | 2228 fps | 96% |
| Norma MRP | <<locked>> | 80% | 45,455 psi | 71% | 2559 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,944 psi | 64% | 2487 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 80% | 53,606 psi | 84% | 2621 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,825 psi | 58% | 2375 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,080 psi | 46% | 1516 fps | 100% |
| ReloadSwiss RS 76 | 75.3 gr | 80% | 34,316 psi | 54% | 2402 fps | 99.1% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,230 psi | 57% | 2421 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 47,819 psi | 75% | 2513 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 46,601 psi | 73% | 2526 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,267 psi | 73% | 2523 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 48,515 psi | 76% | 2507 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 52,431 psi | 82% | 2566 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,804 psi | 73% | 2500 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,002 psi | 64% | 2392 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 90% | 48,660 psi | 76% | 2556 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 46,311 psi | 73% | 2503 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,165 psi | 71% | 2556 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 37,623 psi | 59% | 2392 fps | 96.9% |
| Vihtavuori N568 | <<locked>> | 84% | 37,681 psi | 59% | 2441 fps | 95.5% |
| Vihtavuori N570 | 82.2 gr | 90% | 44,237 psi | 69% | 2608 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,784 psi | 62% | 2493 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,163 psi | 68% | 2441 fps | 99.3% |
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 56 powders for .300 Norma Mag. loaded with the .308 | 230gr | Hornady A-TIP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,828 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,828 fps. ADI AR 2218 gives the best case fill at 100 %, and 56 of the 56 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 230.0 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. Hodgdon Retumbo, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for .300 Norma Mag. with the .308 | 230gr | Hornady A-TIP 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.