Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Woodleigh HS 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 56,420 psi | 90% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,969 psi | 88% | 2769 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2863 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 53,388 psi | 86% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,809 psi | 86% | 2854 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,434 psi | 90% | 2827 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,926 psi | 88% | 2900 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 53,069 psi | 85% | 2890 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,115 psi | 90% | 2954 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,969 psi | 87% | 2802 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,259 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,563 psi | 87% | 2909 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,883 psi | 90% | 2934 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,085 psi | 87% | 2885 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,724 psi | 89% | 2948 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,344 psi | 84% | 2877 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,440 psi | 73% | 2806 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 51,953 psi | 83% | 2957 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2867 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 54,853 psi | 88% | 2819 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2946 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 54,259 psi | 87% | 2807 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 55,216 psi | 89% | 2837 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 53,476 psi | 86% | 2868 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 54,114 psi | 87% | 2841 fps | 98.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2821 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,172 psi | 88% | 2877 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,940 psi | 88% | 2834 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,229 psi | 85% | 2825 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,382 psi | 71% | 2838 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 56,275 psi | 90% | 2946 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 60% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,086 psi | 90% | 2818 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,550 psi | 89% | 2788 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,506 psi | 89% | 2802 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,230 psi | 87% | 2783 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 55,085 psi | 88% | 2838 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,811 psi | 89% | 2831 fps | 99.3% |
| IMR 4831 | <<locked>> | 96% | 55,448 psi | 89% | 2863 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,680 psi | 89% | 2852 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,404 psi | 87% | 2828 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 98% | 55,347 psi | 89% | 2929 fps | 97.1% |
| Lovex S062 | <<locked>> | 84% | 56,434 psi | 90% | 2807 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,970 psi | 90% | 2830 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 53,838 psi | 86% | 2818 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,963 psi | 75% | 2714 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 53,563 psi | 86% | 2810 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,970 psi | 90% | 2893 fps | 98.3% |
| Norma MRP | <<locked>> | 98% | 54,694 psi | 88% | 2972 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 56,231 psi | 90% | 2894 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,201 psi | 87% | 2836 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,621 psi | 86% | 2934 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 54,926 psi | 88% | 2894 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,679 psi | 88% | 2914 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 60% | 1805 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,984 psi | 88% | 2820 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,448 psi | 89% | 2926 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,795 psi | 86% | 2879 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,927 psi | 90% | 2962 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,498 psi | 71% | 2832 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 54,824 psi | 88% | 2768 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,940 psi | 88% | 2815 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,391 psi | 90% | 2868 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 53,417 psi | 86% | 2874 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,259 psi | 87% | 2807 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,970 psi | 90% | 2830 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,434 psi | 90% | 2807 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,838 psi | 86% | 2818 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,852 psi | 85% | 2821 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,883 psi | 90% | 2701 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,579 psi | 89% | 2783 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,953 psi | 85% | 2867 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 54,795 psi | 88% | 2809 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,708 psi | 88% | 2808 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 55,637 psi | 89% | 2895 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,128 psi | 87% | 2850 fps | 98.9% |
| Unknown powder | <<locked>> | 88% | 53,258 psi | 85% | 2845 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,129 psi | 88% | 2679 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 55,230 psi | 89% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,665 psi | 88% | 2734 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,185 psi | 85% | 2748 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,548 psi | 86% | 2813 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,040 psi | 85% | 2795 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,288 psi | 87% | 2759 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,085 psi | 87% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,535 psi | 89% | 2902 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,374 psi | 86% | 2911 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,273 psi | 87% | 2803 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,476 psi | 86% | 2868 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,616 psi | 76% | 2941 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,101 psi | 90% | 2872 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% | 52,765 psi | 85% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,368 psi | 73% | 2608 fps | 97.2% |
| Accurate 3100 | <<locked>> | 86% | 34,505 psi | 55% | 2476 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 50,009 psi | 80% | 2700 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,290 psi | 61% | 2575 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,094 psi | 76% | 2679 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,206 psi | 68% | 2667 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 49,095 psi | 79% | 2828 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,141 psi | 84% | 2893 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,572 psi | 76% | 2701 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,865 psi | 82% | 2772 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,246 psi | 60% | 2586 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,279 psi | 68% | 2709 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,989 psi | 67% | 2662 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,134 psi | 68% | 2711 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,311 psi | 44% | 2341 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,011 psi | 53% | 2518 fps | 95.8% |
| Alliant Reloder-26 | 64.7 gr | 82% | 31,314 psi | 50% | 2513 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 41,553 psi | 67% | 2697 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,979 psi | 77% | 2713 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,134 psi | 68% | 2710 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,177 psi | 68% | 2589 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 48,414 psi | 78% | 2726 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 43,685 psi | 70% | 2693 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 39,581 psi | 63% | 2569 fps | 95% |
| Hodgdon H4831 | <<locked>> | 98% | 48,892 psi | 78% | 2766 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,488 psi | 83% | 2817 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,795 psi | 56% | 2480 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,835 psi | 80% | 2772 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,568 psi | 67% | 2772 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 39,175 psi | 63% | 2630 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 44% | 1576 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,661 psi | 80% | 2720 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,315 psi | 84% | 2744 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,151 psi | 74% | 2654 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,324 psi | 73% | 2628 fps | 97.9% |
| IMR 4350 | <<locked>> | 80% | 37,898 psi | 61% | 2516 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,613 psi | 70% | 2618 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 33,402 psi | 54% | 2449 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 52,170 psi | 84% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,819 psi | 77% | 2717 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 46,949 psi | 75% | 2801 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,792 psi | 80% | 2707 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,104 psi | 66% | 2569 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,465 psi | 63% | 2552 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 33,402 psi | 54% | 2449 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 50,212 psi | 81% | 2757 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,612 psi | 68% | 2655 fps | 95.3% |
| Norma MRP | 65.8 gr | 86% | 36,056 psi | 58% | 2603 fps | 95% |
| Norma URP | <<locked>> | 80% | 38,101 psi | 61% | 2571 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,560 psi | 81% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 46,137 psi | 74% | 2798 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 36,825 psi | 59% | 2554 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 92% | 40,016 psi | 64% | 2651 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 45% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,399 psi | 78% | 2711 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,918 psi | 72% | 2761 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,014 psi | 61% | 2591 fps | 98.2% |
| ReloadSwiss RS 70 | 62.5 gr | 80% | 36,811 psi | 59% | 2597 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,493 psi | 62% | 2695 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 51,605 psi | 83% | 2720 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,368 psi | 73% | 2663 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,673 psi | 75% | 2703 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 41,046 psi | 66% | 2646 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,177 psi | 68% | 2589 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,104 psi | 66% | 2569 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 49,792 psi | 80% | 2707 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,465 psi | 63% | 2552 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,340 psi | 74% | 2714 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,412 psi | 74% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,190 psi | 64% | 2514 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,669 psi | 65% | 2638 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,484 psi | 73% | 2659 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,126 psi | 82% | 2751 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,548 psi | 55% | 2528 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,073 psi | 63% | 2573 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 40,915 psi | 66% | 2623 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 80% | 51,822 psi | 83% | 2633 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,895 psi | 83% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,459 psi | 83% | 2689 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,117 psi | 63% | 2511 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,002 psi | 66% | 2597 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 92% | 39,726 psi | 64% | 2581 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,923 psi | 82% | 2709 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,655 psi | 67% | 2642 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 30,284 psi | 49% | 2420 fps | 96.7% |
| Vihtavuori N560 | <<locked>> | 96% | 48,530 psi | 78% | 2850 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,566 psi | 62% | 2539 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 43,685 psi | 70% | 2693 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,759 psi | 41% | 2371 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,076 psi | 67% | 2633 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 99 powders for .300 Win. Mag. loaded with the .308 | 180gr | Woodleigh HS. Norma MRP delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,972 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2217 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 .300 Win. Mag. with the .308 | 180gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.