Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 220gr | Nosler Ballistic Tip Hunting bullet and 55 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% | 56,028 psi | 88% | 2680 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,795 psi | 86% | 2782 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 86% | 57,203 psi | 90% | 2762 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 55,463 psi | 87% | 2776 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 96% | 54,056 psi | 85% | 2759 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,012 psi | 85% | 2864 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,638 psi | 90% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,884 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,912 psi | 88% | 2772 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,172 psi | 85% | 2684 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,288 psi | 85% | 2756 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,592 psi | 86% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,506 psi | 87% | 2848 fps | 98.3% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 2769 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,970 psi | 88% | 2743 fps | 98.5% |
| Bofors RP15 | <<locked>> | 90% | 55,332 psi | 87% | 2762 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 57,580 psi | 90% | 2825 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 55,912 psi | 88% | 2772 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 55,608 psi | 87% | 2779 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,737 psi | 86% | 2713 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,363 psi | 90% | 2753 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 54,143 psi | 85% | 2621 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,087 psi | 89% | 2894 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,927 psi | 88% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,797 psi | 89% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,230 psi | 87% | 2690 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 53,940 psi | 85% | 2762 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,692 psi | 81% | 2756 fps | 99.8% |
| Lovex S071 | <<locked>> | 94% | 57,653 psi | 90% | 2703 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,261 psi | 90% | 2740 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 2779 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,159 psi | 88% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,114 psi | 86% | 2782 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 57,276 psi | 90% | 2736 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,305 psi | 90% | 2772 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 61% | 1749 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,740 psi | 90% | 2884 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,942 psi | 89% | 2854 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 84% | 54,375 psi | 85% | 2680 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 86% | 56,695 psi | 89% | 2743 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,304 psi | 88% | 2743 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,463 psi | 87% | 2674 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 55,985 psi | 88% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,884 psi | 89% | 2713 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,768 psi | 89% | 2703 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,608 psi | 87% | 2726 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 86% | 56,115 psi | 88% | 2707 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,637 psi | 87% | 2792 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 56,333 psi | 88% | 2785 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 57,609 psi | 90% | 2854 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 96% | 54,737 psi | 86% | 2851 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,751 psi | 84% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,681 psi | 89% | 2713 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% | 42,917 psi | 67% | 2477 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,454 psi | 70% | 2602 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 46,934 psi | 74% | 2598 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,192 psi | 66% | 2546 fps | 98.1% |
| ADI AR 2217 | <<locked>> | 82% | 33,663 psi | 53% | 2359 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 94% | 43,511 psi | 68% | 2657 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 28,848 psi | 45% | 2274 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,969 psi | 85% | 2690 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,847 psi | 73% | 2592 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,917 psi | 67% | 2549 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,858 psi | 66% | 2493 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,056 psi | 56% | 2438 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,123 psi | 74% | 2654 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 44,440 psi | 70% | 2654 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,253 psi | 74% | 2703 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,569 psi | 68% | 2523 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 39,958 psi | 63% | 2490 fps | 98.4% |
| Bofors RP30 | <<locked>> | 80% | 33,605 psi | 53% | 2375 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 42,917 psi | 67% | 2549 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 34,156 psi | 54% | 2372 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 80% | 44,802 psi | 70% | 2546 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,005 psi | 69% | 2530 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,894 psi | 80% | 2575 fps | 100% |
| Hodgdon Retumbo | 72.9 gr | 80% | 35,244 psi | 55% | 2477 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 44% | 1526 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,547 psi | 82% | 2631 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,301 psi | 84% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,788 psi | 72% | 2533 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 40,930 psi | 64% | 2526 fps | 97.8% |
| IMR 8133 Enduron | <<locked>> | 86% | 32,343 psi | 51% | 2362 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 37,173 psi | 58% | 2365 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 53,519 psi | 84% | 2687 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 28,398 psi | 45% | 2274 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 45,556 psi | 71% | 2618 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 41,089 psi | 64% | 2543 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 80% | 53,577 psi | 84% | 2684 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,767 psi | 58% | 2425 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 46% | 1562 fps | 100% |
| ReloadSwiss RS 76 | 78 gr | 80% | 34,316 psi | 54% | 2451 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,332 psi | 57% | 2474 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 47,819 psi | 75% | 2572 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 46,572 psi | 73% | 2582 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,238 psi | 72% | 2579 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 48,733 psi | 76% | 2569 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 52,402 psi | 82% | 2628 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,891 psi | 73% | 2559 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 40,988 psi | 64% | 2444 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 48,646 psi | 76% | 2612 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 46,340 psi | 73% | 2562 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,266 psi | 71% | 2615 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 37,623 psi | 59% | 2444 fps | 96.5% |
| Vihtavuori N568 | <<locked>> | 84% | 37,739 psi | 59% | 2490 fps | 95.1% |
| Vihtavuori N570 | 85.1 gr | 90% | 44,193 psi | 69% | 2661 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,813 psi | 62% | 2549 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,236 psi | 68% | 2497 fps | 99.1% |
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 62 powders for .300 Norma Mag. loaded with the .308 | 220gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 2,894 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,894 fps. Accurate 8700 gives the best case fill at 100 %, and 62 of the 62 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 220.0 gr projectile in 0.308" calls for a 1:11.5 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Norma Mag. with the .308 | 220gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, Lovex D100, Ramshot LRT 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.