Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 181gr | RWS H-Mantel bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 52,054 psi | 85% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 53,316 psi | 88% | 2940 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 53,447 psi | 88% | 3058 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 92% | 54,201 psi | 89% | 3058 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 54,143 psi | 89% | 2999 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 92% | 51,909 psi | 85% | 2999 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,821 psi | 82% | 2956 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,440 psi | 73% | 2917 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,346 psi | 89% | 2995 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,288 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 53,708 psi | 88% | 2986 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 51,996 psi | 85% | 2995 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 53,243 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 52,605 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,214 psi | 87% | 3058 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,824 psi | 88% | 2959 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 54,665 psi | 90% | 3041 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,199 psi | 86% | 3031 fps | 99% |
| Bofors RP5 | <<locked>> | 92% | 51,996 psi | 85% | 2995 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 52,156 psi | 86% | 2881 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,955 psi | 90% | 3048 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 54,940 psi | 90% | 2995 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 53,911 psi | 89% | 2949 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 90% | 51,721 psi | 85% | 2933 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,346 psi | 89% | 2979 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,607 psi | 90% | 2917 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,984 psi | 90% | 3163 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 51,430 psi | 84% | 2966 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 61% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 53,780 psi | 88% | 2927 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,592 psi | 88% | 2910 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 53,650 psi | 88% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 53,084 psi | 87% | 2923 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 94% | 53,403 psi | 88% | 3038 fps | 98.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,045 psi | 66% | 2815 fps | 96.1% |
| Lovex S065 | <<locked>> | 84% | 54,317 psi | 89% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 52,547 psi | 86% | 2904 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 53,301 psi | 88% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,752 psi | 90% | 2982 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 40,045 psi | 66% | 2838 fps | 98.3% |
| Norma MRP | <<locked>> | 90% | 51,735 psi | 85% | 3018 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 51,909 psi | 85% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,070 psi | 89% | 3058 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 54,302 psi | 89% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 52,315 psi | 86% | 2986 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 62% | 1913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,374 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 51,401 psi | 84% | 2986 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 51,909 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,705 psi | 83% | 3041 fps | 97.6% |
| Rottweil R 904 | <<locked>> | 88% | 51,895 psi | 85% | 2910 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 90% | 53,185 psi | 87% | 2972 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 52,156 psi | 86% | 2881 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,317 psi | 89% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 52,547 psi | 86% | 2904 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 53,374 psi | 88% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,765 psi | 87% | 2969 fps | 99.4% |
| Somchem S361 | <<locked>> | 88% | 53,185 psi | 87% | 2900 fps | 98% |
| Somchem S365 | <<locked>> | 86% | 52,228 psi | 86% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 53,650 psi | 88% | 2946 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 54,331 psi | 89% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 53,577 psi | 88% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 53,345 psi | 88% | 2930 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 84% | 52,852 psi | 87% | 2920 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 52,098 psi | 86% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 51,576 psi | 85% | 3012 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 98% | 55,071 psi | 90% | 3051 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,822 psi | 85% | 3048 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,852 psi | 87% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 51,590 psi | 85% | 2940 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,650 psi | 90% | 3110 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,388 psi | 88% | 2940 fps | 99.4% |
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% | 34,722 psi | 57% | 2569 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 46,499 psi | 76% | 2825 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 40,321 psi | 66% | 2795 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 86% | 43,874 psi | 72% | 2861 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 38,667 psi | 63% | 2697 fps | 96.4% |
| ADI AR 2213 | <<locked>> | 84% | 39,581 psi | 65% | 2746 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 92% | 38,232 psi | 63% | 2707 fps | 95% |
| ADI AR 2225 | <<locked>> | 90% | 32,140 psi | 53% | 2605 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,117 psi | 64% | 2700 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,469 psi | 73% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,754 psi | 64% | 2694 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,635 psi | 57% | 2631 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,330 psi | 55% | 2595 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,008 psi | 48% | 2500 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,492 psi | 60% | 2740 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,633 psi | 83% | 2900 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 36,869 psi | 61% | 2687 fps | 95.8% |
| Bofors RP30 | <<locked>> | 90% | 37,057 psi | 61% | 2723 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 34,635 psi | 57% | 2631 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 48,994 psi | 80% | 2828 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 36,477 psi | 60% | 2667 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 48,066 psi | 79% | 2874 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 50,676 psi | 83% | 2894 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 42,337 psi | 70% | 2753 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,510 psi | 68% | 2736 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,061 psi | 69% | 2713 fps | 100% |
| Hodgdon Retumbo | 74.9 gr | 86% | 34,461 psi | 57% | 2707 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 47,805 psi | 78% | 2904 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 46% | 1673 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,440 psi | 73% | 2756 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,415 psi | 83% | 2854 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 44,251 psi | 73% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,249 psi | 68% | 2694 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 40,640 psi | 67% | 2782 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,478 psi | 62% | 2753 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,979 psi | 79% | 2802 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,369 psi | 76% | 2795 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,994 psi | 49% | 2444 fps | 96% |
| Norma 204 | <<locked>> | 80% | 44,585 psi | 73% | 2799 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 32,822 psi | 54% | 2654 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 36,158 psi | 59% | 2700 fps | 97.2% |
| Norma URP | <<locked>> | 80% | 45,600 psi | 75% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,652 psi | 62% | 2726 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 44,425 psi | 73% | 2808 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 33,591 psi | 55% | 2602 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 47% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,383 psi | 76% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,527 psi | 73% | 2864 fps | 100% |
| ReloadSwiss RS 76 | 78.3 gr | 84% | 31,357 psi | 51% | 2612 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,482 psi | 71% | 2900 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 40,030 psi | 66% | 2677 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 38,116 psi | 63% | 2677 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,994 psi | 80% | 2828 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,979 psi | 79% | 2802 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,369 psi | 76% | 2795 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,036 psi | 77% | 2749 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,782 psi | 62% | 2671 fps | 96.3% |
| Somchem S361 | <<locked>> | 82% | 43,613 psi | 72% | 2723 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 42,554 psi | 70% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,725 psi | 64% | 2661 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 51,010 psi | 84% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,949 psi | 77% | 2805 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,475 psi | 55% | 2530 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 46,296 psi | 76% | 2808 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,507 psi | 62% | 2677 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 41,945 psi | 69% | 2818 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 88% | 39,175 psi | 64% | 2743 fps | 95% |
| Vihtavuori N568 | <<locked>> | 96% | 45,034 psi | 74% | 2917 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,079 psi | 76% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,211 psi | 79% | 2877 fps | 99.6% |
| Winchester StaBALL HD | 71.6 gr | 80% | 29,675 psi | 49% | 2618 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,302 psi | 58% | 2582 fps | 95.2% |
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 72 powders for .300 Lapua Mag. loaded with the .308 | 181gr | RWS H-Mantel. Hodgdon Retumbo delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,163 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 181.0 gr projectile in 0.308" calls for a 1:14.0 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. Winchester StaBALL HD, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Lapua Mag. with the .308 | 181gr | RWS H-Mantel 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.