Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 201gr | Apex Outdoors Afterburner bullet and 71 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 Accurate MAGPRO.
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% | 57,159 psi | 90% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,389 psi | 85% | 2769 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,636 psi | 86% | 2890 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 90% | 55,477 psi | 87% | 2894 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 88% | 54,723 psi | 86% | 2825 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 56,289 psi | 88% | 2890 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,360 psi | 85% | 2858 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,187 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,549 psi | 85% | 2818 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,652 psi | 89% | 2887 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,708 psi | 86% | 2805 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,580 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,911 psi | 86% | 2887 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 2874 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,290 psi | 90% | 2848 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 55,825 psi | 87% | 2874 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 2927 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 56,652 psi | 89% | 2887 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,912 psi | 88% | 2762 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,927 psi | 88% | 2884 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 55,680 psi | 87% | 2818 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,086 psi | 88% | 2828 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,013 psi | 86% | 2812 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,347 psi | 87% | 2743 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,449 psi | 88% | 2999 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,854 psi | 88% | 2854 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 59% | 1759 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,566 psi | 90% | 2802 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,203 psi | 90% | 2782 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,694 psi | 86% | 2759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,768 psi | 89% | 2808 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 92% | 54,447 psi | 85% | 2871 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2733 fps | 97.9% |
| Lovex S065 | <<locked>> | 82% | 54,795 psi | 86% | 2733 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,637 psi | 89% | 2785 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,824 psi | 86% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,201 psi | 87% | 2808 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,005 psi | 71% | 2762 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 56,695 psi | 89% | 2907 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,231 psi | 88% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,288 psi | 87% | 2894 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 54,969 psi | 86% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,711 psi | 90% | 2884 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,331 psi | 85% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,144 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,450 psi | 90% | 2995 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 2953 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 55,825 psi | 87% | 2795 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 88% | 54,172 psi | 85% | 2808 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 55,912 psi | 88% | 2762 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,795 psi | 86% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,637 psi | 89% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,290 psi | 90% | 2740 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,348 psi | 90% | 2858 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 57,319 psi | 90% | 2792 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 56,971 psi | 89% | 2802 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,737 psi | 86% | 2782 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 84% | 57,682 psi | 90% | 2789 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,288 psi | 85% | 2766 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,014 psi | 89% | 2799 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,029 psi | 89% | 2831 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,318 psi | 88% | 2904 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 56,594 psi | 89% | 2890 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 2953 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,172 psi | 85% | 2946 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,072 psi | 89% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,680 psi | 87% | 2818 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,869 psi | 89% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,230 psi | 85% | 2776 fps | 99.7% |
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% | 38,609 psi | 61% | 2487 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 50,923 psi | 80% | 2717 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,669 psi | 65% | 2651 fps | 96.8% |
| Accurate MAGPRO | 74.4 gr | 82% | 42,076 psi | 66% | 2648 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 42,119 psi | 66% | 2598 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 37,869 psi | 59% | 2536 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 88% | 36,666 psi | 57% | 2510 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 29,428 psi | 46% | 2362 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,385 psi | 76% | 2717 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,250 psi | 66% | 2595 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,319 psi | 60% | 2549 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,985 psi | 58% | 2507 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,068 psi | 50% | 2431 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,915 psi | 64% | 2654 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 47,572 psi | 75% | 2808 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,732 psi | 75% | 2680 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 35,723 psi | 56% | 2487 fps | 95.9% |
| Bofors RP30 | <<locked>> | 86% | 36,114 psi | 57% | 2526 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 38,319 psi | 60% | 2549 fps | 97% |
| Bofors RP7 | <<locked>> | 80% | 52,736 psi | 83% | 2713 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,998 psi | 55% | 2470 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 52,112 psi | 82% | 2766 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,234 psi | 63% | 2543 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,653 psi | 62% | 2526 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,832 psi | 72% | 2602 fps | 100% |
| Hodgdon Retumbo | 70.4 gr | 82% | 33,489 psi | 52% | 2513 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 51,982 psi | 81% | 2792 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1568 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,863 psi | 75% | 2648 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,809 psi | 84% | 2733 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,182 psi | 76% | 2661 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,684 psi | 65% | 2539 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 39,001 psi | 61% | 2575 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,651 psi | 57% | 2562 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 51,532 psi | 81% | 2684 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,053 psi | 78% | 2684 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,504 psi | 53% | 2372 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 48,211 psi | 76% | 2690 fps | 98.9% |
| Norma 217 | <<locked>> | 88% | 30,414 psi | 48% | 2418 fps | 95% |
| Norma MRP | <<locked>> | 80% | 40,219 psi | 63% | 2618 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 49,501 psi | 78% | 2697 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,172 psi | 57% | 2523 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 48,182 psi | 76% | 2700 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,430 psi | 51% | 2411 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1608 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,792 psi | 80% | 2736 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,878 psi | 77% | 2756 fps | 100% |
| ReloadSwiss RS 76 | 73.5 gr | 80% | 30,429 psi | 48% | 2425 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,003 psi | 66% | 2694 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 43,482 psi | 68% | 2582 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 41,785 psi | 65% | 2585 fps | 98% |
| Rottweil R 907 | <<locked>> | 80% | 52,736 psi | 83% | 2713 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,532 psi | 81% | 2684 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,053 psi | 78% | 2684 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,575 psi | 79% | 2638 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,452 psi | 65% | 2582 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 44,208 psi | 69% | 2569 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 46,760 psi | 73% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,424 psi | 66% | 2569 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 50,792 psi | 80% | 2687 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,840 psi | 58% | 2448 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 80% | 50,183 psi | 79% | 2694 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,524 psi | 65% | 2582 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,147 psi | 63% | 2605 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 38,189 psi | 60% | 2549 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 43,381 psi | 68% | 2707 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 50,502 psi | 79% | 2881 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,835 psi | 78% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,315 psi | 82% | 2769 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,576 psi | 53% | 2546 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,783 psi | 61% | 2497 fps | 97% |
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 77 powders for .300 Norma Mag. loaded with the .308 | 201gr | Apex Outdoors Afterburner. Hodgdon Retumbo delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,759 fps to 2,999 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 1:8.5 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, Accurate MAGPRO rank at the top here: for .300 Norma Mag. with the .308 | 201gr | Apex Outdoors Afterburner 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.