Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 170gr | Lapua Lock Base bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-17.
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% | 54,781 psi | 88% | 2805 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,869 psi | 90% | 2871 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2910 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 55,303 psi | 89% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,927 psi | 90% | 2966 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,158 psi | 88% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,287 psi | 85% | 2949 fps | 97.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2999 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,346 psi | 87% | 3012 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,417 psi | 86% | 2946 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,072 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,217 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,420 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,157 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,202 psi | 90% | 2995 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2995 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,285 psi | 81% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,816 psi | 70% | 2848 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,896 psi | 86% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,834 psi | 78% | 2913 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 53,345 psi | 86% | 2881 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2995 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 56,362 psi | 90% | 2917 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 53,737 psi | 86% | 2894 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,317 psi | 87% | 2959 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 54,230 psi | 87% | 2920 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 54,607 psi | 88% | 2940 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,359 psi | 86% | 2894 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,998 psi | 88% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,563 psi | 87% | 2995 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 58% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,564 psi | 89% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,737 psi | 88% | 2874 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,751 psi | 86% | 2851 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 53,722 psi | 86% | 2894 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,418 psi | 87% | 2887 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 56,246 psi | 90% | 2956 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,114 psi | 87% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,391 psi | 90% | 2933 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,967 psi | 83% | 2969 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 56,260 psi | 90% | 2858 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,853 psi | 88% | 2867 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,476 psi | 87% | 2884 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 55,724 psi | 89% | 2927 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,585 psi | 71% | 2759 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 56,202 psi | 90% | 2877 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,506 psi | 89% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,331 psi | 87% | 2943 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 52,837 psi | 85% | 3018 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 54,447 psi | 87% | 2946 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,347 psi | 90% | 2949 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,098 psi | 84% | 2979 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 92% | 53,316 psi | 85% | 2946 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,630 psi | 75% | 2854 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 59% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,548 psi | 86% | 2874 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,534 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,840 psi | 90% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,331 psi | 87% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,815 psi | 69% | 2861 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 53,461 psi | 86% | 2828 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,417 psi | 86% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,071 psi | 88% | 2923 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 55,347 psi | 89% | 2982 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 56,362 psi | 90% | 2917 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,476 psi | 87% | 2884 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,853 psi | 88% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,724 psi | 89% | 2927 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,940 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,912 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,433 psi | 87% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,114 psi | 87% | 2838 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,868 psi | 88% | 2976 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 53,417 psi | 86% | 2871 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,795 psi | 86% | 2953 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,188 psi | 90% | 2959 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 53,809 psi | 86% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,143 psi | 87% | 2805 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,752 psi | 88% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,171 psi | 85% | 2890 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2871 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,738 psi | 89% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,883 psi | 90% | 2949 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 52,823 psi | 85% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,185 psi | 85% | 3005 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,420 psi | 90% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,563 psi | 87% | 2963 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,585 psi | 73% | 2986 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,246 psi | 90% | 2917 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,434 psi | 90% | 2953 fps | 98.1% |
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% | 51,271 psi | 82% | 2756 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,037 psi | 79% | 2756 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,665 psi | 57% | 2569 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 48,530 psi | 78% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,941 psi | 59% | 2615 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 45,948 psi | 74% | 2733 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,729 psi | 70% | 2769 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 51,097 psi | 82% | 2936 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,589 psi | 81% | 2949 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,888 psi | 70% | 2769 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,441 psi | 74% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,443 psi | 79% | 2828 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,158 psi | 58% | 2628 fps | 97.9% |
| Alliant Reloder-17 | 62.6 gr | 80% | 40,988 psi | 66% | 2756 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,381 psi | 70% | 2762 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,569 psi | 70% | 2812 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,455 psi | 42% | 2372 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,040 psi | 55% | 2608 fps | 95.5% |
| Alliant Reloder-26 | 67.3 gr | 84% | 32,387 psi | 52% | 2608 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 42,960 psi | 69% | 2799 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,731 psi | 75% | 2769 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,569 psi | 70% | 2812 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,075 psi | 66% | 2635 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,007 psi | 75% | 2779 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,986 psi | 63% | 2664 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 41,959 psi | 67% | 2687 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 96% | 51,024 psi | 82% | 2881 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,649 psi | 54% | 2523 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,329 psi | 82% | 2874 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,799 psi | 65% | 2736 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 44% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,098 psi | 84% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,283 psi | 77% | 2769 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,488 psi | 81% | 2795 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 39,233 psi | 63% | 2618 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,467 psi | 68% | 2667 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 35,723 psi | 57% | 2572 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 50,734 psi | 81% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,924 psi | 85% | 2877 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 48,631 psi | 78% | 2907 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 52,852 psi | 85% | 2808 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,486 psi | 78% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,001 psi | 64% | 2615 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 38,334 psi | 61% | 2598 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 34,534 psi | 55% | 2543 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 52,721 psi | 85% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,820 psi | 78% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,367 psi | 71% | 2762 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 40,045 psi | 64% | 2766 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,883 psi | 59% | 2615 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,139 psi | 79% | 2835 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,588 psi | 78% | 2913 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,752 psi | 57% | 2598 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 98% | 43,265 psi | 69% | 2785 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 44% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,007 psi | 75% | 2759 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,555 psi | 70% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,767 psi | 59% | 2635 fps | 97.4% |
| ReloadSwiss RS 70 | 63.5 gr | 80% | 35,708 psi | 57% | 2638 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,914 psi | 64% | 2792 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 50,328 psi | 81% | 2779 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,005 psi | 71% | 2717 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,370 psi | 78% | 2805 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 42,467 psi | 68% | 2746 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 41,075 psi | 66% | 2635 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,001 psi | 64% | 2615 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 48,486 psi | 78% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,334 psi | 61% | 2598 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,078 psi | 72% | 2769 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,504 psi | 84% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,281 psi | 73% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,291 psi | 63% | 2562 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,005 psi | 72% | 2799 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 44,208 psi | 71% | 2713 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 33,286 psi | 53% | 2569 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 40,350 psi | 65% | 2671 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 50,575 psi | 81% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,763 psi | 81% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,293 psi | 68% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,189 psi | 61% | 2612 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 42,467 psi | 68% | 2703 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,965 psi | 79% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,652 psi | 60% | 2612 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,138 psi | 47% | 2454 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 96% | 49,835 psi | 80% | 2946 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,449 psi | 60% | 2585 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,160 psi | 63% | 2671 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,672 psi | 43% | 2461 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,576 psi | 84% | 2861 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,672 psi | 73% | 2772 fps | 95.8% |
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 | 170gr | Lapua Lock Base. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,068 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 58–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:13.5 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 170gr | Lapua Lock Base 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.