Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Sako SuperHammerhead bullet and 90 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 2700 | <<locked>> | 86% | 55,492 psi | 89% | 2782 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,376 psi | 90% | 2877 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 53,911 psi | 86% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,462 psi | 87% | 2864 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 53,824 psi | 86% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,463 psi | 89% | 2913 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 53,200 psi | 85% | 2907 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,622 psi | 89% | 2910 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,607 psi | 88% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,708 psi | 88% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,201 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,852 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,868 psi | 88% | 2900 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 2963 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,779 psi | 85% | 2887 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,948 psi | 74% | 2822 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,779 psi | 85% | 2972 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,111 psi | 82% | 2881 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 55,521 psi | 89% | 2831 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 2963 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 54,607 psi | 88% | 2815 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,593 psi | 89% | 2844 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,114 psi | 87% | 2881 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 90% | 54,708 psi | 88% | 2854 fps | 98.6% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,446 psi | 84% | 2838 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,854 psi | 90% | 2894 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,564 psi | 89% | 2844 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,664 psi | 86% | 2831 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,005 psi | 72% | 2854 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 88% | 52,881 psi | 85% | 2894 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1768 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,229 psi | 85% | 2779 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,072 psi | 90% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,927 psi | 90% | 2815 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,853 psi | 88% | 2795 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,840 psi | 90% | 2854 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,362 psi | 90% | 2844 fps | 99.4% |
| IMR 4831 | <<locked>> | 96% | 56,028 psi | 90% | 2874 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,115 psi | 90% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,853 psi | 88% | 2841 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 98% | 54,491 psi | 87% | 2940 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 53,563 psi | 86% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,098 psi | 85% | 2789 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,418 psi | 87% | 2831 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,717 psi | 75% | 2726 fps | 99% |
| Norma 203B | <<locked>> | 82% | 54,012 psi | 87% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,881 psi | 85% | 2844 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 55,477 psi | 89% | 2986 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 53,258 psi | 85% | 2851 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,824 psi | 88% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,317 psi | 87% | 2949 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 55,492 psi | 89% | 2907 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,158 psi | 88% | 2930 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 60% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,579 psi | 89% | 2831 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,144 psi | 90% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,346 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,794 psi | 85% | 2917 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,933 psi | 72% | 2848 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,259 psi | 89% | 2776 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,608 psi | 89% | 2828 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,534 psi | 86% | 2828 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 53,998 psi | 87% | 2884 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 54,607 psi | 88% | 2815 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,098 psi | 85% | 2789 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 53,563 psi | 86% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,418 psi | 87% | 2831 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,432 psi | 86% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,304 psi | 90% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,202 psi | 90% | 2795 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,534 psi | 86% | 2881 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 55,463 psi | 89% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,361 psi | 89% | 2822 fps | 96.6% |
| Somchem S365 | <<locked>> | 94% | 56,304 psi | 90% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,853 psi | 88% | 2864 fps | 99% |
| Unknown powder | <<locked>> | 88% | 53,896 psi | 86% | 2858 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 55,608 psi | 89% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 55,738 psi | 89% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,100 psi | 88% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,780 psi | 86% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,143 psi | 87% | 2825 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,011 psi | 83% | 2805 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 54,897 psi | 88% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,679 psi | 88% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,303 psi | 89% | 2913 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2986 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,781 psi | 88% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,114 psi | 87% | 2881 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,298 psi | 77% | 2956 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 52,736 psi | 85% | 2825 fps | 98% |
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 2700 | <<locked>> | 80% | 45,716 psi | 73% | 2621 fps | 97.3% |
| Accurate 3100 | <<locked>> | 84% | 32,706 psi | 52% | 2434 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 50,488 psi | 81% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,754 psi | 62% | 2585 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 47,500 psi | 76% | 2687 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,670 psi | 68% | 2680 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,528 psi | 75% | 2782 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,960 psi | 69% | 2684 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,225 psi | 77% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,314 psi | 82% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,666 psi | 60% | 2598 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,714 psi | 68% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,482 psi | 68% | 2674 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,089 psi | 64% | 2667 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,615 psi | 44% | 2352 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,417 psi | 54% | 2530 fps | 96% |
| Alliant Reloder-26 | 63.8 gr | 80% | 29,573 psi | 47% | 2464 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 42,047 psi | 67% | 2710 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 48,646 psi | 78% | 2726 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,089 psi | 64% | 2667 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,583 psi | 68% | 2598 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,849 psi | 78% | 2736 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 44,063 psi | 71% | 2703 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 39,972 psi | 64% | 2579 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 98% | 49,023 psi | 79% | 2779 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,849 psi | 78% | 2776 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,201 psi | 56% | 2490 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,270 psi | 81% | 2779 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,537 psi | 63% | 2726 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,610 psi | 64% | 2644 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 44% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,111 psi | 80% | 2730 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,895 psi | 85% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,615 psi | 75% | 2664 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,716 psi | 73% | 2638 fps | 98% |
| IMR 4350 | <<locked>> | 80% | 38,232 psi | 61% | 2526 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,976 psi | 71% | 2628 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 33,808 psi | 54% | 2461 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 52,663 psi | 84% | 2808 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,486 psi | 78% | 2733 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 47,645 psi | 76% | 2818 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,241 psi | 81% | 2717 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,510 psi | 67% | 2582 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,856 psi | 64% | 2566 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 33,939 psi | 54% | 2464 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,676 psi | 81% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,163 psi | 69% | 2671 fps | 95.6% |
| Norma MRP | 66.5 gr | 86% | 36,521 psi | 59% | 2615 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 38,493 psi | 62% | 2582 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,184 psi | 82% | 2792 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 46,804 psi | 75% | 2815 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,347 psi | 60% | 2569 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 92% | 40,611 psi | 65% | 2667 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 45% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,762 psi | 78% | 2723 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,368 psi | 73% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,609 psi | 62% | 2608 fps | 98.4% |
| ReloadSwiss RS 70 | 63.2 gr | 80% | 37,304 psi | 60% | 2612 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,001 psi | 63% | 2710 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 52,054 psi | 83% | 2730 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,803 psi | 73% | 2674 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,195 psi | 76% | 2717 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 41,582 psi | 67% | 2657 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,583 psi | 68% | 2598 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,510 psi | 67% | 2582 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 50,241 psi | 81% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,856 psi | 64% | 2566 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,978 psi | 75% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,818 psi | 75% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,741 psi | 65% | 2526 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,205 psi | 66% | 2654 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 45,919 psi | 74% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,414 psi | 78% | 2707 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 34,954 psi | 56% | 2539 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 37,043 psi | 59% | 2533 fps | 95% |
| Unknown powder | <<locked>> | 80% | 41,350 psi | 66% | 2635 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,344 psi | 84% | 2641 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,431 psi | 84% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,895 psi | 83% | 2697 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,508 psi | 63% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,408 psi | 66% | 2608 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 92% | 40,190 psi | 64% | 2592 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,532 psi | 83% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,032 psi | 67% | 2651 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,661 psi | 49% | 2431 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 96% | 49,008 psi | 79% | 2864 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,870 psi | 62% | 2549 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 44,063 psi | 71% | 2703 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,497 psi | 39% | 2323 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,554 psi | 68% | 2644 fps | 95.6% |
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 90 powders for .300 Win. Mag. loaded with the .308 | 180gr | Sako SuperHammerhead. Norma MRP delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,986 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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 | Sako SuperHammerhead 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.