Load Specifications
Bullet Manufacturer:Sierra
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:1:12.0
Load data in caliber .300 WSM with .308 | 200gr | Sierra GameKing bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-26 and ReloadSwiss RS 70.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 57,101 psi | 89% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,956 psi | 88% | 2612 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 2641 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 57,174 psi | 90% | 2631 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,070 psi | 85% | 2690 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 56,159 psi | 88% | 2657 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,232 psi | 90% | 2664 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,042 psi | 86% | 2733 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 2723 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,753 psi | 89% | 2789 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,882 psi | 86% | 2726 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,592 psi | 86% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,824 psi | 86% | 2661 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,824 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,970 psi | 88% | 2762 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 2772 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2720 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,370 psi | 76% | 2657 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,308 psi | 66% | 2592 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 2848 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,275 psi | 88% | 2680 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,007 psi | 74% | 2648 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 55,317 psi | 87% | 2654 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2720 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 54,766 psi | 86% | 2641 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 55,767 psi | 87% | 2674 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,653 psi | 90% | 2759 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 92% | 54,607 psi | 86% | 2677 fps | 98.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,158 psi | 86% | 2707 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,768 psi | 89% | 2664 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,969 psi | 86% | 2667 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 57,246 psi | 90% | 2707 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,452 psi | 65% | 2615 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 92% | 56,434 psi | 88% | 2779 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,927 psi | 89% | 2654 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,289 psi | 88% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,333 psi | 88% | 2641 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,129 psi | 86% | 2621 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 55,492 psi | 87% | 2674 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,507 psi | 89% | 2671 fps | 99.5% |
| IMR 4831 | <<locked>> | 98% | 55,361 psi | 87% | 2694 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,202 psi | 88% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,621 psi | 86% | 2664 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2759 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 82% | 56,507 psi | 89% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,114 psi | 86% | 2589 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,000 psi | 89% | 2641 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,463 psi | 88% | 2664 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,638 psi | 90% | 2703 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,859 psi | 67% | 2503 fps | 98.5% |
| Norma 201 | <<locked>> | 82% | 55,042 psi | 86% | 2605 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,709 psi | 87% | 2602 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,624 psi | 90% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,231 psi | 88% | 2726 fps | 98.5% |
| Norma MRPᴾ | <<locked>> | 100% | 54,273 psi | 85% | 2799 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 56,333 psi | 88% | 2723 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,911 psi | 86% | 2677 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,882 psi | 84% | 2766 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 94% | 54,955 psi | 86% | 2726 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,256 psi | 79% | 2687 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,680 psi | 87% | 2657 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,941 psi | 88% | 2726 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,695 psi | 87% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,667 psi | 90% | 2766 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,057 psi | 88% | 2792 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,002 psi | 64% | 2605 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 55,680 psi | 87% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,477 psi | 87% | 2651 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,927 psi | 89% | 2703 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 2756 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 90% | 54,766 psi | 86% | 2641 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,463 psi | 88% | 2664 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,507 psi | 89% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,000 psi | 89% | 2641 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,638 psi | 90% | 2703 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,116 psi | 90% | 2710 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,508 psi | 90% | 2671 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,781 psi | 86% | 2638 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,970 psi | 88% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,608 psi | 89% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,275 psi | 88% | 2621 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2753 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 55,550 psi | 87% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,246 psi | 90% | 2654 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,492 psi | 87% | 2648 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,984 psi | 86% | 2648 fps | 96.7% |
| Somchem S365 | <<locked>> | 96% | 55,317 psi | 87% | 2723 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 2733 fps | 99.4% |
| Unknown powder | <<locked>> | 92% | 57,116 psi | 90% | 2730 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,840 psi | 88% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,014 psi | 88% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,521 psi | 87% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,753 psi | 89% | 2628 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,551 psi | 90% | 2700 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,008 psi | 75% | 2579 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,042 psi | 86% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,433 psi | 85% | 2700 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2733 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 2743 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,563 psi | 86% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,653 psi | 90% | 2759 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2713 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,217 psi | 88% | 2707 fps | 98.6% |
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% | 50,024 psi | 78% | 2490 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,134 psi | 68% | 2411 fps | 96.9% |
| Accurate 3100 | <<locked>> | 86% | 32,155 psi | 50% | 2287 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,384 psi | 74% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,013 psi | 56% | 2382 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 80% | 52,953 psi | 83% | 2615 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,846 psi | 70% | 2477 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 90% | 42,569 psi | 67% | 2520 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 46,079 psi | 72% | 2608 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,211 psi | 77% | 2677 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,914 psi | 63% | 2467 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,295 psi | 71% | 2500 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,515 psi | 76% | 2566 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,259 psi | 55% | 2392 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,755 psi | 62% | 2507 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,508 psi | 62% | 2461 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,421 psi | 62% | 2503 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,744 psi | 40% | 2165 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,038 psi | 49% | 2326 fps | 95.2% |
| Alliant Reloder-26 | 56.8 gr | 82% | 29,211 psi | 46% | 2320 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,605 psi | 82% | 2631 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,481 psi | 65% | 2546 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 45,498 psi | 71% | 2510 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,421 psi | 62% | 2503 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 40,234 psi | 63% | 2395 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,977 psi | 72% | 2523 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 41,104 psi | 64% | 2490 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 82% | 40,118 psi | 63% | 2425 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,327 psi | 76% | 2602 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 53,577 psi | 84% | 2621 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,808 psi | 51% | 2293 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,210 psi | 74% | 2566 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,885 psi | 61% | 2556 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 36,883 psi | 58% | 2431 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 43% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,500 psi | 74% | 2520 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,705 psi | 78% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,208 psi | 69% | 2457 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,526 psi | 68% | 2431 fps | 97.7% |
| IMR 4350 | <<locked>> | 80% | 35,984 psi | 56% | 2329 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,539 psi | 65% | 2421 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 31,531 psi | 49% | 2267 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 49,763 psi | 78% | 2592 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,167 psi | 75% | 2562 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 47,094 psi | 74% | 2641 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 80% | 52,997 psi | 83% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,011 psi | 82% | 2543 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,587 psi | 75% | 2507 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,117 psi | 61% | 2375 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 37,405 psi | 59% | 2359 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 31,183 psi | 49% | 2264 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,634 psi | 81% | 2559 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,286 psi | 82% | 2556 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,877 psi | 75% | 2552 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,292 psi | 63% | 2457 fps | 95% |
| Norma MRP | <<locked>> | 88% | 36,187 psi | 57% | 2464 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 35,882 psi | 56% | 2379 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,848 psi | 75% | 2572 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,427 psi | 73% | 2641 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,693 psi | 54% | 2362 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 92% | 37,391 psi | 59% | 2448 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1483 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,919 psi | 72% | 2507 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,054 psi | 82% | 2671 fps | 100% |
| ReloadSwiss RS 60 | 54.1 gr | 80% | 42,264 psi | 66% | 2556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,534 psi | 56% | 2395 fps | 98% |
| ReloadSwiss RS 70 | 54.9 gr | 80% | 34,722 psi | 54% | 2402 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,897 psi | 56% | 2480 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 49,269 psi | 77% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,873 psi | 67% | 2464 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,193 psi | 69% | 2500 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 41,147 psi | 64% | 2497 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 40,234 psi | 63% | 2395 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,117 psi | 61% | 2375 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,997 psi | 83% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,587 psi | 75% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,405 psi | 59% | 2359 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,816 psi | 69% | 2513 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,708 psi | 84% | 2618 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,184 psi | 80% | 2585 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,446 psi | 82% | 2493 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,266 psi | 69% | 2372 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,363 psi | 60% | 2326 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,756 psi | 64% | 2493 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 52,228 psi | 82% | 2493 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,519 psi | 84% | 2605 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,192 psi | 68% | 2461 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,095 psi | 75% | 2543 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 32,358 psi | 51% | 2339 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 36,637 psi | 57% | 2379 fps | 95.2% |
| Unknown powder | <<locked>> | 80% | 38,783 psi | 61% | 2428 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 80% | 49,835 psi | 78% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,327 psi | 77% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,892 psi | 77% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,057 psi | 58% | 2323 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,696 psi | 61% | 2402 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 94% | 39,610 psi | 62% | 2431 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 48,559 psi | 76% | 2510 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,349 psi | 62% | 2444 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 28,108 psi | 44% | 2234 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 98% | 48,298 psi | 76% | 2684 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,434 psi | 57% | 2349 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 41,104 psi | 64% | 2490 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,265 psi | 38% | 2192 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,163 psi | 66% | 2484 fps | 95.8% |
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 105 powders for .300 WSM loaded with the .308 | 200gr | Sierra GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,848 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,848 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-19 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 60, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for .300 WSM with the .308 | 200gr | Sierra GameKing 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.