Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 180gr | Hornady GMX bullet and 75 powders. The key underlying parameters are shown in the table above.
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>> | 96% | 54,215 psi | 89% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 52,257 psi | 86% | 2927 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 52,083 psi | 86% | 3038 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 94% | 53,113 psi | 87% | 3041 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 54,201 psi | 89% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,374 psi | 88% | 2986 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 54,766 psi | 90% | 3048 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,527 psi | 75% | 2867 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,364 psi | 66% | 2825 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,534 psi | 88% | 2982 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,374 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,447 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,881 psi | 87% | 2972 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,418 psi | 89% | 3041 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 51,764 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,097 psi | 84% | 3015 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 51,619 psi | 85% | 3041 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 53,359 psi | 88% | 3022 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,862 psi | 77% | 2940 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 54,418 psi | 89% | 3041 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 52,011 psi | 85% | 2881 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,256 psi | 83% | 2963 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 86% | 54,259 psi | 89% | 2986 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 53,708 psi | 88% | 2943 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 54,708 psi | 90% | 2982 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,606 psi | 88% | 2966 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,766 psi | 88% | 2910 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,067 psi | 82% | 3077 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 54,679 psi | 90% | 3025 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,301 psi | 88% | 2917 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,534 psi | 88% | 2907 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 52,939 psi | 87% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,533 psi | 86% | 2913 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 52,475 psi | 86% | 3018 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 53,940 psi | 89% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 51,880 psi | 85% | 2894 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,808 psi | 85% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,157 psi | 89% | 2972 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 35,723 psi | 59% | 2740 fps | 96.6% |
| Norma MRP | <<locked>> | 94% | 54,215 psi | 89% | 3064 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 54,723 psi | 90% | 2969 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,924 psi | 87% | 3038 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 53,505 psi | 88% | 2972 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,056 psi | 90% | 3031 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 62% | 1893 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,969 psi | 89% | 2992 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 52,359 psi | 86% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,578 psi | 90% | 3041 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,444 psi | 83% | 3074 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 52,881 psi | 87% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,882 psi | 90% | 2956 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 52,330 psi | 86% | 2963 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 52,011 psi | 85% | 2881 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,940 psi | 89% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 51,880 psi | 85% | 2894 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,476 psi | 89% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,272 psi | 87% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,069 psi | 87% | 2851 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 51,909 psi | 85% | 2956 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 52,663 psi | 86% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 52,692 psi | 87% | 2887 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 54,708 psi | 90% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,837 psi | 87% | 2936 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 53,940 psi | 89% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,997 psi | 87% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 52,214 psi | 86% | 2910 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 52,025 psi | 85% | 2910 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,012 psi | 89% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,244 psi | 89% | 3058 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,577 psi | 88% | 3031 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 52,475 psi | 86% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,476 psi | 89% | 2989 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 52,257 psi | 86% | 3091 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 52,779 psi | 87% | 2930 fps | 99.1% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 31,038 psi | 51% | 2484 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 42,264 psi | 69% | 2753 fps | 99.8% |
| Accurate High Country | <<locked>> | 84% | 39,233 psi | 64% | 2779 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 90% | 45,963 psi | 75% | 2910 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 50,908 psi | 84% | 2841 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,072 psi | 63% | 2684 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 41,539 psi | 68% | 2789 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 39,856 psi | 65% | 2746 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 33,083 psi | 54% | 2635 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,824 psi | 59% | 2625 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,872 psi | 67% | 2766 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,224 psi | 78% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,029 psi | 62% | 2677 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 35,984 psi | 59% | 2674 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,052 psi | 49% | 2520 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,021 psi | 46% | 2474 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,590 psi | 54% | 2651 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 38,261 psi | 63% | 2726 fps | 95.9% |
| Bofors RP30 | <<locked>> | 94% | 38,130 psi | 63% | 2756 fps | 95.2% |
| Bofors RP5 | <<locked>> | 84% | 35,984 psi | 59% | 2674 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,658 psi | 75% | 2762 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 38,174 psi | 63% | 2710 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 44,396 psi | 73% | 2808 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 47,166 psi | 77% | 2828 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 44,527 psi | 73% | 2799 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,627 psi | 72% | 2782 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,464 psi | 63% | 2648 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,737 psi | 59% | 2743 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 43,584 psi | 72% | 2828 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 45% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,307 psi | 68% | 2697 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,268 psi | 78% | 2795 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 40,466 psi | 66% | 2703 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,424 psi | 71% | 2740 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 39,929 psi | 66% | 2766 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 44,556 psi | 73% | 2740 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 42,801 psi | 70% | 2726 fps | 98.7% |
| Lovex S071 | <<locked>> | 84% | 30,530 psi | 50% | 2467 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 41,046 psi | 67% | 2730 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 33,417 psi | 55% | 2677 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 32,634 psi | 54% | 2615 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,843 psi | 69% | 2746 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 39,508 psi | 65% | 2772 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,756 psi | 67% | 2740 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 35,056 psi | 58% | 2644 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 46% | 1696 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,212 psi | 82% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,322 psi | 69% | 2776 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,712 psi | 67% | 2792 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,576 psi | 53% | 2651 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 49,356 psi | 81% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 39,508 psi | 65% | 2664 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 37,217 psi | 61% | 2664 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 45,658 psi | 75% | 2762 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,556 psi | 73% | 2740 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 42,801 psi | 70% | 2726 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,952 psi | 84% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,169 psi | 82% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,627 psi | 72% | 2687 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,883 psi | 61% | 2654 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 49,429 psi | 81% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,134 psi | 71% | 2713 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 38,638 psi | 63% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,302 psi | 58% | 2585 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 47,282 psi | 78% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,265 psi | 71% | 2740 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 34,809 psi | 57% | 2569 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 42,699 psi | 70% | 2746 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 33,692 psi | 55% | 2598 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 43,830 psi | 72% | 2864 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 92% | 40,451 psi | 66% | 2779 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,496 psi | 70% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,396 psi | 73% | 2808 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,513 psi | 44% | 2513 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,941 psi | 61% | 2625 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 75 powders for .300 Lapua Mag. loaded with the .308 | 180gr | Hornady GMX. Winchester StaBALL HD delivers the highest muzzle velocity at 3,091 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,091 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.