Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 185gr | Lapua Mega bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,898 psi | 89% | 2710 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,273 psi | 85% | 2733 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2831 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 57,261 psi | 90% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,476 psi | 85% | 2825 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,273 psi | 85% | 2913 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 56,927 psi | 89% | 2795 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,332 psi | 87% | 2871 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 2923 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,739 psi | 89% | 2923 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,535 psi | 87% | 2867 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,535 psi | 87% | 2867 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,447 psi | 85% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,752 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,158 psi | 86% | 2881 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,579 psi | 89% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,781 psi | 86% | 2861 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2920 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 2848 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,759 psi | 72% | 2779 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,768 psi | 89% | 2989 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 2841 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 55,361 psi | 87% | 2789 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2920 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 54,520 psi | 85% | 2772 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,506 psi | 87% | 2805 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,536 psi | 89% | 2877 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 56,101 psi | 88% | 2835 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 98% | 56,869 psi | 89% | 2867 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,550 psi | 87% | 2848 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,608 psi | 87% | 2805 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,869 psi | 89% | 2838 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,831 psi | 70% | 2812 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 90% | 56,840 psi | 89% | 2917 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 57% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,508 psi | 90% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,449 psi | 88% | 2779 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,390 psi | 87% | 2766 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 55,666 psi | 87% | 2812 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,304 psi | 88% | 2802 fps | 99.5% |
| IMR 4831 | <<locked>> | 92% | 54,839 psi | 86% | 2815 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,188 psi | 88% | 2822 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,723 psi | 86% | 2799 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2894 fps | 97.3% |
| Lovex S062 | <<locked>> | 84% | 56,855 psi | 89% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,463 psi | 88% | 2799 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 57,711 psi | 90% | 2841 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,586 psi | 73% | 2687 fps | 99% |
| Norma 203B | <<locked>> | 84% | 57,450 psi | 90% | 2828 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,376 psi | 88% | 2861 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 55,230 psi | 87% | 2940 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 56,637 psi | 89% | 2861 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,766 psi | 86% | 2805 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,418 psi | 85% | 2910 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,361 psi | 87% | 2864 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,588 psi | 76% | 2785 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 58% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,535 psi | 87% | 2792 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,840 psi | 88% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,215 psi | 85% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,376 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,643 psi | 70% | 2805 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,245 psi | 87% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,448 psi | 87% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,014 psi | 89% | 2841 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 98% | 57,682 psi | 90% | 2900 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 54,520 psi | 85% | 2772 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,463 psi | 88% | 2799 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,855 psi | 89% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,711 psi | 90% | 2841 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,971 psi | 89% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,333 psi | 88% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,927 psi | 88% | 2753 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,188 psi | 90% | 2897 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 55,317 psi | 87% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,129 psi | 86% | 2782 fps | 96.7% |
| Somchem S365 | <<locked>> | 94% | 56,159 psi | 88% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,520 psi | 85% | 2818 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 55,724 psi | 87% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,825 psi | 87% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,536 psi | 89% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,216 psi | 87% | 2805 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2799 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 84% | 57,421 psi | 90% | 2753 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,244 psi | 85% | 2808 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,201 psi | 87% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,506 psi | 87% | 2933 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,723 psi | 86% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,782 psi | 89% | 2881 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,066 psi | 75% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,752 psi | 86% | 2818 fps | 98.4% |
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 2495 | <<locked>> | 80% | 53,229 psi | 83% | 2661 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,647 psi | 79% | 2674 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,590 psi | 51% | 2398 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,444 psi | 79% | 2671 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,725 psi | 61% | 2549 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 50,691 psi | 79% | 2854 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,442 psi | 74% | 2648 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,641 psi | 67% | 2644 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 46,427 psi | 73% | 2743 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,736 psi | 83% | 2864 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,714 psi | 67% | 2641 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,714 psi | 67% | 2641 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,964 psi | 75% | 2671 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,300 psi | 80% | 2740 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,637 psi | 59% | 2559 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,772 psi | 67% | 2684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,250 psi | 66% | 2635 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,885 psi | 63% | 2628 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,586 psi | 43% | 2320 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,299 psi | 49% | 2438 fps | 95% |
| Alliant Reloder-26 | 62.8 gr | 80% | 29,501 psi | 46% | 2428 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 42,090 psi | 66% | 2674 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,443 psi | 76% | 2684 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,885 psi | 63% | 2628 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,511 psi | 67% | 2562 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,878 psi | 77% | 2697 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,582 psi | 64% | 2592 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,424 psi | 68% | 2615 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 49,588 psi | 78% | 2749 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,733 psi | 76% | 2736 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,143 psi | 55% | 2454 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,258 psi | 83% | 2785 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,436 psi | 62% | 2687 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 39,407 psi | 62% | 2602 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 43% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,867 psi | 84% | 2749 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,922 psi | 78% | 2680 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,199 psi | 82% | 2713 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 38,232 psi | 60% | 2493 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,961 psi | 69% | 2592 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 37,159 psi | 58% | 2503 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 52,620 psi | 82% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,327 psi | 76% | 2690 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 47,355 psi | 74% | 2776 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 50,183 psi | 79% | 2677 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,452 psi | 65% | 2543 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 39,813 psi | 62% | 2526 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 33,852 psi | 53% | 2428 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 50,647 psi | 79% | 2726 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,076 psi | 68% | 2631 fps | 95.7% |
| Norma MRP | 65.5 gr | 86% | 36,521 psi | 57% | 2579 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,479 psi | 60% | 2546 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 51,082 psi | 80% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,034 psi | 69% | 2720 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,231 psi | 58% | 2530 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 39,146 psi | 61% | 2602 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 44% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,617 psi | 76% | 2680 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,440 psi | 71% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,450 psi | 60% | 2569 fps | 98.5% |
| ReloadSwiss RS 70 | 62.2 gr | 80% | 37,202 psi | 58% | 2575 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,245 psi | 57% | 2605 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 51,982 psi | 81% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,803 psi | 72% | 2635 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,166 psi | 74% | 2677 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 41,350 psi | 65% | 2618 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,511 psi | 67% | 2562 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,452 psi | 65% | 2543 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 50,183 psi | 79% | 2677 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,813 psi | 62% | 2526 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,804 psi | 73% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,731 psi | 73% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,567 psi | 64% | 2487 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,959 psi | 64% | 2612 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 45,876 psi | 72% | 2631 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,341 psi | 76% | 2667 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 34,954 psi | 55% | 2503 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,985 psi | 58% | 2493 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 52,286 psi | 82% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,533 psi | 82% | 2664 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,932 psi | 69% | 2562 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,798 psi | 62% | 2543 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,783 psi | 61% | 2526 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 50,749 psi | 80% | 2661 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,305 psi | 62% | 2543 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,632 psi | 48% | 2398 fps | 97% |
| Vihtavuori N560 | <<locked>> | 94% | 48,486 psi | 76% | 2812 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,798 psi | 61% | 2510 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,741 psi | 64% | 2598 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,410 psi | 38% | 2290 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,437 psi | 65% | 2585 fps | 95.4% |
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 91 powders for .308 Norma Mag. loaded with the .308 | 185gr | Lapua Mega. Alliant Reloder-26 delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,739 fps to 2,989 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .308 Norma Mag. with the .308 | 185gr | Lapua Mega 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.