Load Specifications
Load data in caliber .300 Lapua Mag. with .31 | 200gr | Lapua D166 bullet and 64 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 Winchester StaBALL HD.
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>> | 90% | 52,721 psi | 87% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 53,693 psi | 88% | 2808 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 55,042 psi | 90% | 2946 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 54,520 psi | 90% | 2874 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 52,243 psi | 86% | 2881 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,998 psi | 89% | 2907 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,457 psi | 80% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,650 psi | 90% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,114 psi | 89% | 2864 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 52,605 psi | 86% | 2877 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,143 psi | 89% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 53,534 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,418 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,560 psi | 83% | 2927 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,650 psi | 88% | 2844 fps | 97.3% |
| Bofors RP15 | <<locked>> | 92% | 52,054 psi | 85% | 2867 fps | 99.7% |
| Bofors RP30 | <<locked>> | 98% | 53,316 psi | 88% | 2920 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 52,605 psi | 86% | 2877 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 51,880 psi | 85% | 2874 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 88% | 52,098 psi | 86% | 2818 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,549 psi | 90% | 2858 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,853 psi | 90% | 2785 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 52,431 psi | 86% | 2992 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 62% | 1788 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 53,766 psi | 88% | 2799 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,172 psi | 89% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 53,156 psi | 87% | 2802 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 54,186 psi | 89% | 2923 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,092 psi | 72% | 2785 fps | 98.4% |
| Lovex S065 | <<locked>> | 82% | 54,346 psi | 89% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 52,547 psi | 86% | 2776 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,172 psi | 89% | 2808 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,766 psi | 90% | 2854 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 44,353 psi | 73% | 2808 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 52,547 psi | 86% | 2897 fps | 100% |
| Norma URP | <<locked>> | 82% | 52,127 psi | 86% | 2792 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,911 psi | 90% | 2943 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 54,534 psi | 90% | 2854 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,127 psi | 87% | 2871 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,261 psi | 63% | 1827 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 53,751 psi | 88% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 51,982 psi | 85% | 2861 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 52,924 psi | 87% | 2982 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 52,069 psi | 85% | 2940 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 86% | 52,011 psi | 85% | 2789 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 88% | 53,693 psi | 88% | 2854 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,346 psi | 89% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 52,547 psi | 86% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 53,345 psi | 88% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 53,272 psi | 87% | 2851 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 53,287 psi | 87% | 2782 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 52,852 psi | 87% | 2795 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,099 psi | 89% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 53,722 psi | 88% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 53,708 psi | 88% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 52,910 psi | 87% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 52,823 psi | 87% | 2825 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 52,257 psi | 86% | 2897 fps | 99% |
| Vihtavuori N565 | <<locked>> | 94% | 52,533 psi | 86% | 2884 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 52,953 psi | 87% | 2943 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,867 psi | 88% | 2999 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 53,011 psi | 87% | 2740 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 52,373 psi | 86% | 2930 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,853 psi | 88% | 2822 fps | 99.8% |
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% | 37,811 psi | 62% | 2523 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 50,256 psi | 83% | 2756 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 38,667 psi | 63% | 2631 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 41,713 psi | 68% | 2648 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 37,231 psi | 61% | 2579 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 36,230 psi | 59% | 2556 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 28,747 psi | 47% | 2405 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,066 psi | 79% | 2762 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,785 psi | 69% | 2641 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,608 psi | 62% | 2589 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,448 psi | 60% | 2546 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,473 psi | 52% | 2470 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,393 psi | 66% | 2700 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 47,094 psi | 77% | 2861 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 44,643 psi | 73% | 2674 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 35,027 psi | 57% | 2530 fps | 96.4% |
| Bofors RP30 | <<locked>> | 86% | 35,563 psi | 58% | 2575 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 37,608 psi | 62% | 2589 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 84% | 34,403 psi | 56% | 2513 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,784 psi | 65% | 2589 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,015 psi | 64% | 2569 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,208 psi | 74% | 2641 fps | 100% |
| Hodgdon Retumbo | 69.4 gr | 80% | 30,792 psi | 51% | 2493 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 46% | 1594 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,500 psi | 78% | 2694 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 47,485 psi | 78% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,307 psi | 68% | 2582 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 35,998 psi | 59% | 2562 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,085 psi | 59% | 2608 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 51,068 psi | 84% | 2730 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,371 psi | 81% | 2723 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,561 psi | 53% | 2402 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 47,805 psi | 78% | 2740 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 29,602 psi | 49% | 2457 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 39,610 psi | 65% | 2661 fps | 99% |
| Norma URP | <<locked>> | 80% | 48,878 psi | 80% | 2740 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,592 psi | 58% | 2566 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 47,703 psi | 78% | 2743 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,734 psi | 52% | 2448 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 47% | 1634 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,212 psi | 82% | 2779 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,399 psi | 79% | 2802 fps | 100% |
| ReloadSwiss RS 76 | 74.2 gr | 80% | 29,675 psi | 49% | 2461 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 38,479 psi | 63% | 2674 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 42,931 psi | 70% | 2625 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 41,278 psi | 68% | 2631 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,068 psi | 84% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,371 psi | 81% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,864 psi | 82% | 2677 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,944 psi | 67% | 2625 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 43,700 psi | 72% | 2612 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 46,267 psi | 76% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,669 psi | 68% | 2608 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 50,386 psi | 83% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,274 psi | 60% | 2487 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 80% | 49,719 psi | 82% | 2740 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,683 psi | 67% | 2618 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,610 psi | 65% | 2651 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 37,420 psi | 61% | 2589 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 90% | 39,914 psi | 66% | 2694 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 96% | 46,746 psi | 77% | 2867 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,443 psi | 81% | 2687 fps | 100% |
| Winchester StaBALL HD | 71.2 gr | 80% | 32,938 psi | 54% | 2585 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,261 psi | 63% | 2539 fps | 97.5% |
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 70 powders for .300 Lapua Mag. loaded with the .31 | 200gr | Lapua D166. Vihtavuori N570 delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,788 fps to 2,999 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 200.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, Winchester StaBALL HD rank at the top here: for .300 Lapua Mag. with the .31 | 200gr | Lapua D166 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 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.