Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 220gr | Sako Hammerhead bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N570.
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>> | 88% | 52,228 psi | 86% | 2651 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 54,491 psi | 89% | 2805 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 86% | 53,708 psi | 88% | 2733 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 51,706 psi | 85% | 2746 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 98% | 53,621 psi | 88% | 2776 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 49,763 psi | 82% | 2815 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,692 psi | 85% | 2799 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 53,954 psi | 89% | 2730 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,273 psi | 89% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 53,374 psi | 88% | 2723 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 52,185 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 53,983 psi | 89% | 2710 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 53,592 psi | 88% | 2776 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,085 psi | 89% | 2792 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,375 psi | 89% | 2867 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 52,910 psi | 87% | 2713 fps | 98% |
| Bofors RP15 | <<locked>> | 90% | 51,663 psi | 85% | 2733 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 53,272 psi | 87% | 2792 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 52,185 psi | 86% | 2743 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 51,488 psi | 85% | 2743 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,926 psi | 90% | 2736 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 53,853 psi | 88% | 2720 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,244 psi | 89% | 2644 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 52,373 psi | 86% | 2854 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,652 psi | 62% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 53,055 psi | 87% | 2657 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 53,417 psi | 88% | 2657 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 52,214 psi | 86% | 2664 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 90% | 53,838 psi | 88% | 2785 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,282 psi | 78% | 2720 fps | 99.5% |
| Lovex S071 | <<locked>> | 94% | 53,896 psi | 88% | 2677 fps | 100% |
| Norma 204 | <<locked>> | 82% | 53,838 psi | 88% | 2713 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 47,993 psi | 79% | 2743 fps | 100% |
| Norma MRP | <<locked>> | 86% | 52,098 psi | 86% | 2759 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,940 psi | 90% | 2697 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 54,650 psi | 90% | 2805 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 53,751 psi | 88% | 2710 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 52,823 psi | 87% | 2736 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 63% | 1739 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 52,605 psi | 86% | 2848 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 51,996 psi | 85% | 2812 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 54,621 psi | 90% | 2703 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 53,127 psi | 87% | 2717 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 52,750 psi | 87% | 2713 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 52,402 psi | 86% | 2648 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 52,518 psi | 86% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 53,432 psi | 88% | 2687 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 53,185 psi | 87% | 2674 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 51,982 psi | 85% | 2694 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 86% | 52,475 psi | 86% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 51,750 psi | 85% | 2759 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 52,127 psi | 86% | 2749 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 53,011 psi | 87% | 2815 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 98% | 53,853 psi | 88% | 2874 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 90% | 52,707 psi | 87% | 2792 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 53,026 psi | 87% | 2684 fps | 100% |
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% | 40,132 psi | 66% | 2454 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 41,205 psi | 68% | 2569 fps | 97% |
| ADI AR 2209 | <<locked>> | 80% | 44,092 psi | 72% | 2572 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 39,436 psi | 65% | 2516 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 84% | 33,620 psi | 55% | 2385 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 96% | 43,163 psi | 71% | 2680 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 26,832 psi | 44% | 2244 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,541 psi | 73% | 2572 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,749 psi | 83% | 2667 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,121 psi | 72% | 2569 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,016 psi | 66% | 2523 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,827 psi | 64% | 2470 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,489 psi | 55% | 2411 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,221 psi | 71% | 2621 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 43,555 psi | 72% | 2677 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 41,220 psi | 68% | 2493 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 37,246 psi | 61% | 2464 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 31,009 psi | 51% | 2349 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 40,016 psi | 66% | 2523 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 31,865 psi | 52% | 2343 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 42,105 psi | 69% | 2520 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,292 psi | 68% | 2503 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,863 psi | 79% | 2552 fps | 100% |
| Hodgdon Retumbo | 67.9 gr | 80% | 32,692 psi | 54% | 2444 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 46% | 1519 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,821 psi | 82% | 2608 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,053 psi | 82% | 2612 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,366 psi | 71% | 2510 fps | 98% |
| IMR 7828 SSC | <<locked>> | 80% | 38,232 psi | 63% | 2500 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 88% | 31,720 psi | 52% | 2388 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 34,650 psi | 57% | 2339 fps | 99.2% |
| Norma 204 | <<locked>> | 80% | 50,415 psi | 83% | 2657 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 27,920 psi | 46% | 2303 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 42,206 psi | 69% | 2589 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 51,459 psi | 84% | 2648 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,884 psi | 62% | 2507 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 80% | 50,430 psi | 83% | 2661 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,910 psi | 56% | 2395 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 47% | 1552 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,705 psi | 52% | 2421 fps | 98.2% |
| ReloadSwiss RS 80 | 78.8 gr | 86% | 35,737 psi | 59% | 2500 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 45,121 psi | 74% | 2546 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 43,685 psi | 72% | 2559 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,352 psi | 71% | 2552 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 45,934 psi | 75% | 2539 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 49,081 psi | 81% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,034 psi | 72% | 2533 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 38,435 psi | 63% | 2421 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 92% | 48,559 psi | 80% | 2635 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 43,352 psi | 71% | 2543 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,090 psi | 69% | 2585 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 80% | 34,838 psi | 57% | 2418 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 86% | 37,202 psi | 61% | 2516 fps | 95.3% |
| Vihtavuori N570 | 81.1 gr | 92% | 43,497 psi | 71% | 2687 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,114 psi | 59% | 2523 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,393 psi | 66% | 2470 fps | 98.8% |
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 56 powders for .300 Lapua Mag. loaded with the .308 | 220gr | Sako Hammerhead. Vihtavuori N570 delivers the highest muzzle velocity at 2,874 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,874 fps. ADI AR 2218 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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. Hodgdon Retumbo, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for .300 Lapua Mag. with the .308 | 220gr | Sako Hammerhead 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.