Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 180gr | Sierra SPT Pro-Hunter bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC 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% | 51,721 psi | 85% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,968 psi | 87% | 2943 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,723 psi | 90% | 3064 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 90% | 53,824 psi | 88% | 2999 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 55,100 psi | 90% | 3061 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,516 psi | 81% | 2956 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,150 psi | 72% | 2917 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,940 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,795 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 53,388 psi | 88% | 2986 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 51,663 psi | 85% | 2999 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,881 psi | 87% | 2976 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 52,257 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 52,837 psi | 87% | 3058 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,577 psi | 88% | 2963 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 54,331 psi | 89% | 3041 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,851 psi | 85% | 3031 fps | 98.9% |
| Bofors RP5 | <<locked>> | 92% | 51,663 psi | 85% | 2999 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 52,069 psi | 85% | 2887 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,865 psi | 84% | 2982 fps | 99% |
| Hodgdon H4350 | <<locked>> | 84% | 52,446 psi | 86% | 2930 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 96% | 54,447 psi | 89% | 2989 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,027 psi | 89% | 2979 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,273 psi | 89% | 2920 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,592 psi | 90% | 3163 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,955 psi | 90% | 3035 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1873 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,042 psi | 90% | 2913 fps | 99.9% |
| IMR 4350 | <<locked>> | 86% | 53,490 psi | 88% | 2927 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,359 psi | 88% | 2910 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 54,752 psi | 90% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,808 psi | 87% | 2927 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 92% | 53,287 psi | 87% | 3041 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 54,012 psi | 89% | 2910 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 52,272 psi | 86% | 2907 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 52,953 psi | 87% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,433 psi | 89% | 2982 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,740 psi | 65% | 2838 fps | 98.2% |
| Norma MRP | <<locked>> | 90% | 51,387 psi | 84% | 3018 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 55,027 psi | 90% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 52,808 psi | 87% | 3045 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 86% | 53,983 psi | 89% | 2986 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,954 psi | 89% | 3022 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 62% | 1916 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,026 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,013 psi | 90% | 3051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 51,561 psi | 85% | 3097 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,314 psi | 83% | 3041 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 90% | 55,013 psi | 90% | 2969 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 52,881 psi | 87% | 2976 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 52,069 psi | 85% | 2887 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,012 psi | 89% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 52,272 psi | 86% | 2907 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 53,287 psi | 87% | 2864 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,460 psi | 86% | 2969 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 52,895 psi | 87% | 2900 fps | 97.9% |
| Somchem S365 | <<locked>> | 86% | 51,866 psi | 85% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 53,345 psi | 88% | 2946 fps | 99.7% |
| Unknown powder | <<locked>> | 82% | 51,793 psi | 85% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,781 psi | 90% | 2867 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 51,924 psi | 85% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,650 psi | 90% | 2956 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 82% | 52,533 psi | 86% | 2940 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 51,750 psi | 85% | 2953 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 51,953 psi | 85% | 3025 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 98% | 54,723 psi | 90% | 3054 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,474 psi | 85% | 3048 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,547 psi | 86% | 2871 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,157 psi | 89% | 3110 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,534 psi | 90% | 2966 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% | 34,490 psi | 57% | 2569 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 46,166 psi | 76% | 2828 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 47,514 psi | 78% | 2936 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 38,580 psi | 63% | 2700 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 39,378 psi | 65% | 2746 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 40,538 psi | 67% | 2769 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 31,923 psi | 52% | 2602 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,164 psi | 73% | 2835 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,111 psi | 84% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,508 psi | 63% | 2694 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,753 psi | 60% | 2690 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,069 psi | 54% | 2595 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,906 psi | 47% | 2503 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,201 psi | 59% | 2740 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,386 psi | 83% | 2904 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 36,593 psi | 60% | 2684 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 36,782 psi | 60% | 2723 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 36,753 psi | 60% | 2690 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 48,921 psi | 80% | 2831 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 92% | 39,001 psi | 64% | 2736 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 46,238 psi | 76% | 2815 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 88% | 42,061 psi | 69% | 2753 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,249 psi | 68% | 2736 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,785 psi | 69% | 2713 fps | 100% |
| Hodgdon Retumbo | 74.8 gr | 86% | 34,258 psi | 56% | 2707 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 47,485 psi | 78% | 2904 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 46% | 1673 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,706 psi | 85% | 2861 fps | 99.8% |
| IMR 4350 | <<locked>> | 80% | 44,367 psi | 73% | 2762 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,154 psi | 82% | 2854 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 39,972 psi | 66% | 2690 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,002 psi | 67% | 2697 fps | 95.2% |
| IMR 7828 SSC | 74.7 gr | 84% | 40,408 psi | 66% | 2785 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 47,718 psi | 78% | 2805 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,137 psi | 76% | 2795 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,776 psi | 49% | 2444 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 44,324 psi | 73% | 2802 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 32,576 psi | 53% | 2651 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 36,056 psi | 59% | 2703 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 45,353 psi | 74% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,218 psi | 64% | 2769 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 44,150 psi | 72% | 2812 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 82% | 34,142 psi | 56% | 2621 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,456 psi | 47% | 1716 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,267 psi | 76% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,411 psi | 73% | 2871 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,446 psi | 55% | 2680 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,178 psi | 71% | 2900 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 39,943 psi | 66% | 2680 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 37,840 psi | 62% | 2677 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,921 psi | 80% | 2831 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,718 psi | 78% | 2805 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,137 psi | 76% | 2795 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,746 psi | 77% | 2753 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,550 psi | 62% | 2674 fps | 96.2% |
| Somchem S361 | <<locked>> | 82% | 43,395 psi | 71% | 2726 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 42,380 psi | 70% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,479 psi | 63% | 2664 fps | 97.3% |
| Unknown powder | <<locked>> | 80% | 48,385 psi | 79% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,542 psi | 75% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,704 psi | 80% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,592 psi | 57% | 2562 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 49,182 psi | 81% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,217 psi | 61% | 2677 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 86% | 42,366 psi | 70% | 2838 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 41,684 psi | 68% | 2805 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 44,715 psi | 73% | 2917 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,788 psi | 75% | 2766 fps | 100% |
| Winchester StaBALL HD | 71.5 gr | 80% | 29,443 psi | 48% | 2615 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,232 psi | 63% | 2657 fps | 96.2% |
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 75 powders for .300 Lapua Mag. loaded with the .308 | 180gr | Sierra SPT Pro-Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,163 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 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, Alliant Reloder-33 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, IMR 7828 SSC, Hodgdon Retumbo rank at the top here: for .300 Lapua Mag. with the .308 | 180gr | Sierra SPT Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.