Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 180gr | MAKER Expanding Subsonic bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Hodgdon Retumbo.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 51,430 psi | 84% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,823 psi | 87% | 2940 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 53,534 psi | 88% | 3054 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 90% | 53,519 psi | 88% | 2995 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 54,781 psi | 90% | 3054 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,211 psi | 81% | 2949 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,874 psi | 72% | 2910 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,534 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,650 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 53,098 psi | 87% | 2982 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,810 psi | 90% | 3048 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,518 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 51,953 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 52,475 psi | 86% | 3051 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,374 psi | 88% | 2956 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 53,998 psi | 89% | 3035 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 3022 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 54,810 psi | 90% | 3048 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 55,114 psi | 90% | 2936 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,375 psi | 89% | 3041 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 54,302 psi | 89% | 2989 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 53,490 psi | 88% | 2946 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 54,766 psi | 90% | 2989 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,766 psi | 88% | 2972 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,882 psi | 88% | 2913 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,302 psi | 89% | 3156 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,665 psi | 90% | 3028 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 53,345 psi | 88% | 2923 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,200 psi | 87% | 2907 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 53,200 psi | 87% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,489 psi | 86% | 2920 fps | 98% |
| IMR 7828 SSC | <<locked>> | 94% | 52,750 psi | 87% | 3031 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 53,853 psi | 88% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 52,098 psi | 86% | 2900 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 52,605 psi | 86% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,070 psi | 89% | 2976 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,494 psi | 65% | 2831 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 54,781 psi | 90% | 3074 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,839 psi | 90% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,388 psi | 88% | 3051 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 53,679 psi | 88% | 2979 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 51,677 psi | 85% | 2982 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,927 psi | 62% | 1916 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 52,692 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,665 psi | 90% | 3045 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 51,053 psi | 84% | 3087 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,850 psi | 82% | 3031 fps | 97.3% |
| Rottweil R 904 | <<locked>> | 90% | 54,694 psi | 90% | 2959 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 52,518 psi | 86% | 2969 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 55,114 psi | 90% | 2936 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,853 psi | 88% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 52,098 psi | 86% | 2900 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,968 psi | 87% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,098 psi | 86% | 2963 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 52,620 psi | 86% | 2894 fps | 97.8% |
| Somchem S365 | <<locked>> | 86% | 51,692 psi | 85% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 53,214 psi | 87% | 2946 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 53,911 psi | 89% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 53,127 psi | 87% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,721 psi | 87% | 2923 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 84% | 52,228 psi | 86% | 2917 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,824 psi | 90% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,578 psi | 90% | 3068 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 54,404 psi | 89% | 3048 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,010 psi | 84% | 3038 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,446 psi | 86% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,491 psi | 89% | 2992 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,766 psi | 88% | 3107 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,968 psi | 87% | 2936 fps | 99.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 34,345 psi | 56% | 2562 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 45,977 psi | 75% | 2825 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 43,279 psi | 71% | 2854 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 38,290 psi | 63% | 2690 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 86% | 41,901 psi | 69% | 2805 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 40,335 psi | 66% | 2762 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 90% | 31,734 psi | 52% | 2595 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,005 psi | 72% | 2828 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,894 psi | 84% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,363 psi | 63% | 2690 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,622 psi | 60% | 2690 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,909 psi | 54% | 2592 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,674 psi | 47% | 2493 fps | 95.8% |
| Alliant Reloder-26 | 74.1 gr | 80% | 36,027 psi | 59% | 2736 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,183 psi | 82% | 2897 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 36,448 psi | 60% | 2684 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 39,059 psi | 64% | 2776 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,622 psi | 60% | 2690 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 48,588 psi | 80% | 2825 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 38,609 psi | 63% | 2726 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 47,587 psi | 78% | 2874 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 50,198 psi | 82% | 2887 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,771 psi | 69% | 2746 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,932 psi | 72% | 2792 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,611 psi | 68% | 2710 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 86% | 34,127 psi | 56% | 2700 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 47,195 psi | 77% | 2897 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 46% | 1673 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,019 psi | 72% | 2756 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,995 psi | 82% | 2851 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,816 psi | 72% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,741 psi | 67% | 2690 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 40,263 psi | 66% | 2779 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,558 psi | 78% | 2799 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,963 psi | 75% | 2792 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,631 psi | 49% | 2438 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 44,193 psi | 73% | 2799 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 32,329 psi | 53% | 2644 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 35,737 psi | 59% | 2697 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 45,150 psi | 74% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 40,045 psi | 66% | 2789 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 43,976 psi | 72% | 2805 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,243 psi | 55% | 2598 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,456 psi | 47% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,905 psi | 75% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,092 psi | 72% | 2861 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,243 psi | 55% | 2674 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,917 psi | 70% | 2894 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 39,653 psi | 65% | 2671 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 37,710 psi | 62% | 2674 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 48,588 psi | 80% | 2825 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,558 psi | 78% | 2799 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,963 psi | 75% | 2792 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,601 psi | 77% | 2749 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,376 psi | 61% | 2667 fps | 96% |
| Somchem S361 | <<locked>> | 82% | 43,120 psi | 71% | 2720 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 42,018 psi | 69% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,348 psi | 63% | 2657 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,546 psi | 83% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,514 psi | 76% | 2802 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,127 psi | 54% | 2526 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 45,876 psi | 75% | 2805 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,014 psi | 61% | 2674 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 41,350 psi | 68% | 2812 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 90% | 41,408 psi | 68% | 2799 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 44,280 psi | 73% | 2907 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,687 psi | 75% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,776 psi | 78% | 2877 fps | 99.5% |
| Winchester StaBALL HD | 71.2 gr | 80% | 29,327 psi | 48% | 2612 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,911 psi | 57% | 2579 fps | 95% |
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 70 powders for .300 Lapua Mag. loaded with the .308 | 180gr | MAKER Expanding Subsonic. Hodgdon Retumbo delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,156 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, 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. ADI AR 2217, ADI AR 2225, Bofors RP30 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, Winchester StaBALL HD, Hodgdon Retumbo rank at the top here: for .300 Lapua Mag. with the .308 | 180gr | MAKER Expanding Subsonic 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.