Load Specifications
Bullet:.31 | 200gr | Lapua D166
Bullet Manufacturer:Lapua
Bullet Weight:200 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 WSM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:13.0
Load data in caliber .300 WSM with .31 | 200gr | Lapua D166 bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,563 psi | 86% | 2556 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,695 psi | 87% | 2628 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,214 psi | 83% | 2674 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 54,955 psi | 86% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,564 psi | 87% | 2717 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,013 psi | 86% | 2808 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 82% | 57,377 psi | 90% | 2684 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,158 psi | 86% | 2644 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,434 psi | 88% | 2762 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,012 psi | 85% | 2756 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,085 psi | 85% | 2759 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,782 psi | 87% | 2664 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,043 psi | 88% | 2687 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,246 psi | 88% | 2769 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,711 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,767 psi | 87% | 2753 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2753 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,792 psi | 78% | 2687 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,424 psi | 68% | 2621 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 2877 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,319 psi | 90% | 2703 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,544 psi | 76% | 2684 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 56,826 psi | 89% | 2684 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2753 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 56,028 psi | 88% | 2671 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 57,159 psi | 90% | 2700 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,027 psi | 85% | 2717 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 57,479 psi | 90% | 2730 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 98% | 54,230 psi | 85% | 2703 fps | 96.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,739 psi | 89% | 2743 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,623 psi | 89% | 2697 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,650 psi | 86% | 2680 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,482 psi | 67% | 2651 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 53,940 psi | 85% | 2753 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 57% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,419 psi | 87% | 2644 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,578 psi | 86% | 2625 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,261 psi | 90% | 2664 fps | 99.7% |
| IMR 4350 | <<locked>> | 94% | 56,927 psi | 89% | 2703 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,711 psi | 90% | 2697 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 55,869 psi | 88% | 2707 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,464 psi | 90% | 2710 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,883 psi | 88% | 2694 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,547 psi | 81% | 2730 fps | 97% |
| Lovex S060 | <<locked>> | 82% | 56,043 psi | 88% | 2608 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,737 psi | 86% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,302 psi | 85% | 2644 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 55,434 psi | 87% | 2684 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,237 psi | 69% | 2536 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 56,028 psi | 88% | 2628 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,768 psi | 89% | 2621 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,332 psi | 87% | 2671 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,609 psi | 90% | 2756 fps | 98.8% |
| Norma MRPᴾ | <<locked>> | 100% | 55,927 psi | 88% | 2831 fps | 99.7% |
| Norma URP | <<locked>> | 94% | 57,667 psi | 90% | 2749 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,014 psi | 88% | 2697 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,779 psi | 81% | 2746 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 56,420 psi | 88% | 2756 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,919 psi | 72% | 2625 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,202 psi | 58% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,913 psi | 89% | 2684 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,276 psi | 90% | 2753 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,174 psi | 90% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,259 psi | 87% | 2740 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,725 psi | 90% | 2825 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,337 psi | 66% | 2644 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 84% | 56,710 psi | 89% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,695 psi | 89% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,505 psi | 85% | 2677 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 98% | 54,969 psi | 86% | 2740 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 90% | 56,028 psi | 88% | 2671 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,302 psi | 85% | 2644 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 54,737 psi | 86% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,434 psi | 87% | 2684 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,708 psi | 86% | 2687 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,898 psi | 88% | 2661 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,014 psi | 89% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,740 psi | 90% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,406 psi | 90% | 2648 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,476 psi | 85% | 2733 fps | 98.7% |
| Somchem S335 | <<locked>> | 82% | 56,478 psi | 89% | 2556 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,652 psi | 89% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,434 psi | 88% | 2677 fps | 97.1% |
| Somchem S365 | <<locked>> | 96% | 57,101 psi | 89% | 2753 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,680 psi | 87% | 2713 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 82% | 57,551 psi | 90% | 2539 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,116 psi | 90% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,334 psi | 90% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,404 psi | 85% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,362 psi | 88% | 2697 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 2638 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 55,390 psi | 87% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,376 psi | 87% | 2703 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 2762 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2825 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,869 psi | 88% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,273 psi | 85% | 2720 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,947 psi | 70% | 2746 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,811 psi | 87% | 2664 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 2710 fps | 98.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,169 psi | 80% | 2513 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,037 psi | 77% | 2526 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 30,980 psi | 49% | 2264 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,472 psi | 76% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,970 psi | 58% | 2408 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 47,790 psi | 75% | 2690 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,969 psi | 85% | 2638 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,774 psi | 72% | 2500 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,785 psi | 64% | 2493 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 47,239 psi | 74% | 2641 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,415 psi | 79% | 2703 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,267 psi | 73% | 2523 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,516 psi | 78% | 2589 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,085 psi | 57% | 2418 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,828 psi | 64% | 2533 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,582 psi | 64% | 2490 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,654 psi | 64% | 2536 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,426 psi | 41% | 2192 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,850 psi | 50% | 2356 fps | 95.9% |
| Alliant Reloder-26 | 58.2 gr | 82% | 30,110 psi | 47% | 2352 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,679 psi | 84% | 2654 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 39,900 psi | 63% | 2520 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,717 psi | 73% | 2539 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,654 psi | 64% | 2536 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,060 psi | 64% | 2418 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,905 psi | 74% | 2546 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 38,972 psi | 61% | 2451 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 41,945 psi | 66% | 2470 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 47,413 psi | 74% | 2595 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,470 psi | 73% | 2579 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,692 psi | 53% | 2320 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,097 psi | 80% | 2628 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,929 psi | 63% | 2592 fps | 95.9% |
| Hodgdon Superformance | 58.5 gr | 80% | 37,710 psi | 59% | 2457 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 43% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,112 psi | 82% | 2598 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,138 psi | 75% | 2530 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,444 psi | 79% | 2562 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 36,753 psi | 58% | 2352 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,569 psi | 67% | 2451 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 35,491 psi | 56% | 2362 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 50,749 psi | 80% | 2615 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,485 psi | 73% | 2543 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 45,078 psi | 71% | 2615 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 52,750 psi | 83% | 2562 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,341 psi | 76% | 2526 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,958 psi | 63% | 2402 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 38,247 psi | 60% | 2385 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 32,271 psi | 51% | 2293 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 52,663 psi | 83% | 2582 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,316 psi | 84% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,849 psi | 77% | 2579 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,220 psi | 65% | 2484 fps | 95.5% |
| Norma MRP | <<locked>> | 86% | 34,751 psi | 54% | 2438 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 36,767 psi | 58% | 2402 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 48,965 psi | 77% | 2598 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 44,788 psi | 70% | 2621 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,621 psi | 56% | 2392 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 37,246 psi | 58% | 2451 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 43% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,949 psi | 74% | 2533 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,417 psi | 84% | 2697 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,395 psi | 68% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,593 psi | 57% | 2425 fps | 98.4% |
| ReloadSwiss RS 70 | 56.2 gr | 80% | 35,578 psi | 56% | 2431 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,956 psi | 58% | 2520 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,314 psi | 79% | 2539 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,859 psi | 69% | 2487 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,107 psi | 71% | 2523 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 39,479 psi | 62% | 2470 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 41,060 psi | 64% | 2418 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,958 psi | 63% | 2402 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 48,341 psi | 76% | 2526 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,247 psi | 60% | 2385 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,918 psi | 70% | 2536 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,359 psi | 82% | 2612 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,519 psi | 84% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,237 psi | 71% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,131 psi | 61% | 2349 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,102 psi | 61% | 2467 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,185 psi | 83% | 2513 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,150 psi | 69% | 2484 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,487 psi | 78% | 2572 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 33,257 psi | 52% | 2365 fps | 99.9% |
| Somchem S385 | <<locked>> | 86% | 37,739 psi | 59% | 2408 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 54,085 psi | 85% | 2500 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,488 psi | 79% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,618 psi | 79% | 2516 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,206 psi | 66% | 2421 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,203 psi | 60% | 2402 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 36,999 psi | 58% | 2385 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 48,834 psi | 77% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,550 psi | 59% | 2402 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 29,124 psi | 46% | 2267 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 46,093 psi | 72% | 2651 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,260 psi | 58% | 2375 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 38,972 psi | 61% | 2451 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,322 psi | 37% | 2162 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,504 psi | 82% | 2618 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,436 psi | 62% | 2438 fps | 95.1% |
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 100 powders for .300 WSM loaded with the .31 | 200gr | Lapua D166. Alliant Reloder-26 delivers the highest muzzle velocity at 2,877 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,877 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, 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. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 WSM with the .31 | 200gr | Lapua D166 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.