Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 230gr | Sierra MatchKing bullet and 62 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 76 and ReloadSwiss RS 80.
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% | 51,605 psi | 85% | 2579 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,534 psi | 90% | 2736 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 53,156 psi | 87% | 2657 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 54,708 psi | 90% | 2723 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 52,982 psi | 87% | 2700 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 48,994 psi | 80% | 2740 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,024 psi | 84% | 2723 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 53,751 psi | 88% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 52,881 psi | 87% | 2651 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,085 psi | 90% | 2720 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 53,330 psi | 88% | 2635 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 52,852 psi | 87% | 2700 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 53,214 psi | 87% | 2713 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,519 psi | 88% | 2792 fps | 98.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 45,078 psi | 74% | 2648 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 52,301 psi | 86% | 2641 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 54,534 psi | 90% | 2710 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 52,504 psi | 86% | 2713 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 55,085 psi | 90% | 2720 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,491 psi | 89% | 2720 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,042 psi | 90% | 2638 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 54,215 psi | 89% | 2661 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 53,345 psi | 88% | 2648 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 53,838 psi | 88% | 2569 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 51,735 psi | 85% | 2779 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 62% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 52,504 psi | 86% | 2582 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,491 psi | 89% | 2608 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 51,735 psi | 85% | 2592 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 53,156 psi | 87% | 2710 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,644 psi | 77% | 2648 fps | 99.5% |
| Lovex S070 | <<locked>> | 82% | 54,766 psi | 90% | 2612 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 53,345 psi | 88% | 2602 fps | 100% |
| Norma 204 | <<locked>> | 82% | 53,447 psi | 88% | 2641 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 47,181 psi | 77% | 2667 fps | 100% |
| Norma MRP | <<locked>> | 88% | 55,056 psi | 90% | 2736 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,491 psi | 89% | 2625 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 52,678 psi | 86% | 2710 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 53,345 psi | 88% | 2638 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,722 psi | 88% | 2687 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 63% | 1683 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,549 psi | 90% | 2694 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 51,953 psi | 85% | 2772 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,969 psi | 90% | 2795 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 54,027 psi | 89% | 2628 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 52,562 psi | 86% | 2641 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,766 psi | 90% | 2612 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 52,170 psi | 86% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 51,764 psi | 85% | 2572 fps | 99.4% |
| Somchem S365 | <<locked>> | 82% | 51,837 psi | 85% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 52,982 psi | 87% | 2615 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 52,736 psi | 87% | 2602 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 54,824 psi | 90% | 2674 fps | 97% |
| Vihtavuori N550 | <<locked>> | 82% | 55,100 psi | 90% | 2618 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 52,011 psi | 85% | 2612 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,679 psi | 90% | 2740 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 94% | 54,969 psi | 90% | 2730 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 52,127 psi | 86% | 2740 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 98% | 53,084 psi | 87% | 2795 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,100 psi | 90% | 2569 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 51,793 psi | 85% | 2713 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 53,664 psi | 88% | 2628 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% | 39,740 psi | 65% | 2385 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 38,682 psi | 64% | 2454 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 43,627 psi | 72% | 2503 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 39,059 psi | 64% | 2451 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 31,169 psi | 51% | 2270 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 96% | 42,612 psi | 70% | 2608 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 26,556 psi | 44% | 2188 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,299 psi | 83% | 2595 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,700 psi | 72% | 2497 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,610 psi | 65% | 2457 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,421 psi | 63% | 2405 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,098 psi | 54% | 2346 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,685 psi | 70% | 2552 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 42,873 psi | 70% | 2605 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 98% | 41,916 psi | 69% | 2589 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 40,901 psi | 67% | 2428 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 36,927 psi | 61% | 2402 fps | 98.2% |
| Bofors RP30 | <<locked>> | 80% | 30,647 psi | 50% | 2287 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 39,610 psi | 65% | 2457 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 29,936 psi | 49% | 2238 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 80% | 51,692 psi | 85% | 2589 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 36,898 psi | 61% | 2352 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,915 psi | 67% | 2434 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,413 psi | 78% | 2480 fps | 100% |
| Hodgdon Retumbo | 64.9 gr | 80% | 32,314 psi | 53% | 2382 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 46% | 1470 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,342 psi | 81% | 2536 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,150 psi | 74% | 2470 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,931 psi | 70% | 2441 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 80% | 40,118 psi | 66% | 2484 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 88% | 31,299 psi | 51% | 2326 fps | 95.5% |
| Lovex S070 | <<locked>> | 80% | 51,474 psi | 85% | 2562 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,345 psi | 56% | 2277 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 49,922 psi | 82% | 2585 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 25,802 psi | 42% | 2188 fps | 95% |
| Norma MRP | <<locked>> | 80% | 41,771 psi | 69% | 2520 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 51,097 psi | 84% | 2575 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,047 psi | 69% | 2533 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 80% | 49,922 psi | 82% | 2585 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,709 psi | 60% | 2402 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 48% | 1506 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,850 psi | 83% | 2641 fps | 100% |
| ReloadSwiss RS 76 | 69.5 gr | 80% | 31,328 psi | 51% | 2359 fps | 98.4% |
| ReloadSwiss RS 80 | 75.3 gr | 86% | 35,172 psi | 58% | 2434 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 44,802 psi | 74% | 2480 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 80% | 43,207 psi | 71% | 2487 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 51,474 psi | 85% | 2562 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,859 psi | 70% | 2484 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 45,469 psi | 75% | 2470 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 48,515 psi | 80% | 2533 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,671 psi | 72% | 2467 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 38,043 psi | 62% | 2356 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 92% | 47,935 psi | 79% | 2562 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 51,779 psi | 85% | 2575 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,786 psi | 70% | 2470 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,669 psi | 68% | 2516 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 34,403 psi | 56% | 2352 fps | 96.1% |
| Vihtavuori N568 | <<locked>> | 86% | 36,637 psi | 60% | 2451 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 92% | 42,888 psi | 70% | 2615 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,576 psi | 85% | 2523 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,505 psi | 58% | 2457 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,555 psi | 72% | 2467 fps | 99.4% |
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 62 powders for .300 Lapua Mag. loaded with the .308 | 230gr | Sierra MatchKing. ReloadSwiss RS 80 delivers the highest muzzle velocity at 2,795 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,795 fps. ADI AR 2218 gives the best case fill at 100 %, and 62 of the 62 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 230.0 gr projectile in 0.308" calls for a 1:10.5 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 76, ReloadSwiss RS 80 rank at the top here: for .300 Lapua Mag. with the .308 | 230gr | Sierra MatchKing 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.