Load Specifications
Bullet:.308 | 200gr | Barnes X S
Bullet Manufacturer:Barnes
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:1:11.0
Load data in caliber .300 WSM with .308 | 200gr | Barnes X S bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Alliant Reloder-16.
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>> | 82% | 56,318 psi | 88% | 2536 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,159 psi | 90% | 2595 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 2638 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 56,362 psi | 88% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,941 psi | 88% | 2684 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,537 psi | 90% | 2644 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,984 psi | 86% | 2602 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,927 psi | 88% | 2713 fps | 98.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,795 psi | 84% | 2707 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,653 psi | 90% | 2769 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,999 psi | 88% | 2628 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,391 psi | 88% | 2651 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,666 psi | 87% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,971 psi | 89% | 2749 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,129 psi | 86% | 2700 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2710 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 2651 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,671 psi | 68% | 2585 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,521 psi | 89% | 2831 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,232 psi | 90% | 2664 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,385 psi | 76% | 2641 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 57,319 psi | 90% | 2648 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2710 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 56,391 psi | 88% | 2631 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 57,493 psi | 90% | 2664 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,216 psi | 87% | 2694 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 92% | 55,666 psi | 87% | 2657 fps | 98.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,304 psi | 88% | 2690 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,304 psi | 88% | 2654 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,955 psi | 86% | 2648 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,844 psi | 67% | 2608 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 92% | 57,305 psi | 90% | 2762 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 58% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,810 psi | 86% | 2595 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,360 psi | 85% | 2569 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,319 psi | 90% | 2621 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,130 psi | 88% | 2605 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 56,463 psi | 88% | 2654 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,377 psi | 90% | 2651 fps | 99.4% |
| IMR 4831 | <<locked>> | 98% | 56,840 psi | 89% | 2680 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,302 psi | 85% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,535 psi | 87% | 2644 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,056 psi | 86% | 2743 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 56,086 psi | 88% | 2569 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,434 psi | 87% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,781 psi | 86% | 2608 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 55,796 psi | 87% | 2644 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,165 psi | 71% | 2510 fps | 98.7% |
| Norma 201 | <<locked>> | 82% | 56,768 psi | 89% | 2592 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,174 psi | 90% | 2589 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,709 psi | 87% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,363 psi | 90% | 2710 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 55,506 psi | 87% | 2789 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 57,479 psi | 90% | 2710 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,028 psi | 88% | 2661 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,868 psi | 86% | 2746 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 56,231 psi | 88% | 2713 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,430 psi | 81% | 2671 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,478 psi | 59% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,159 psi | 90% | 2648 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,203 psi | 90% | 2713 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,579 psi | 89% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,317 psi | 87% | 2703 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,145 psi | 90% | 2779 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,728 psi | 67% | 2605 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 57,493 psi | 90% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,421 psi | 90% | 2644 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,505 psi | 85% | 2635 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 54,636 psi | 86% | 2694 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 56,391 psi | 88% | 2631 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,781 psi | 86% | 2608 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 55,434 psi | 87% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,796 psi | 87% | 2644 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,505 psi | 85% | 2648 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,898 psi | 88% | 2621 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,319 psi | 90% | 2523 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,476 psi | 85% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,609 psi | 90% | 2605 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2736 fps | 98.8% |
| Somchem S335 | <<locked>> | 82% | 57,029 psi | 89% | 2523 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,159 psi | 90% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,159 psi | 88% | 2631 fps | 96.5% |
| Somchem S365 | <<locked>> | 96% | 56,681 psi | 89% | 2713 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,506 psi | 87% | 2671 fps | 99% |
| Unknown powder | <<locked>> | 90% | 54,824 psi | 86% | 2667 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 57,305 psi | 90% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,479 psi | 90% | 2552 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,623 psi | 89% | 2559 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,056 psi | 86% | 2575 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,071 psi | 86% | 2635 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,385 psi | 77% | 2569 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 56,405 psi | 88% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,753 psi | 87% | 2687 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,956 psi | 88% | 2726 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 2726 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,579 psi | 87% | 2625 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,216 psi | 87% | 2694 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,208 psi | 71% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,043 psi | 89% | 2687 fps | 98.4% |
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% | 53,098 psi | 83% | 2493 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,715 psi | 70% | 2405 fps | 97% |
| Accurate 3100 | <<locked>> | 84% | 32,721 psi | 51% | 2260 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 50,256 psi | 79% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,334 psi | 60% | 2392 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 80% | 54,360 psi | 85% | 2602 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,166 psi | 72% | 2467 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,220 psi | 65% | 2457 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 47,485 psi | 74% | 2598 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,372 psi | 79% | 2664 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,050 psi | 74% | 2497 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,053 psi | 78% | 2556 fps | 100% |
| Alliant Reloder-16 | 48.3 gr | 80% | 36,883 psi | 58% | 2392 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,249 psi | 65% | 2503 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,872 psi | 64% | 2454 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,988 psi | 64% | 2503 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,876 psi | 44% | 2192 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,851 psi | 51% | 2336 fps | 95.7% |
| Alliant Reloder-26 | 53.3 gr | 80% | 29,443 psi | 46% | 2287 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,853 psi | 84% | 2618 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 40,509 psi | 63% | 2490 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 47,601 psi | 75% | 2510 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,988 psi | 64% | 2503 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 42,061 psi | 66% | 2392 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 47,819 psi | 75% | 2520 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 42,656 psi | 67% | 2484 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 82% | 41,510 psi | 65% | 2418 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,676 psi | 78% | 2589 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,650 psi | 54% | 2300 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,631 psi | 76% | 2556 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,480 psi | 63% | 2556 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 38,464 psi | 60% | 2431 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 43% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,747 psi | 76% | 2507 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,430 psi | 81% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,556 psi | 71% | 2448 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,889 psi | 70% | 2421 fps | 97.8% |
| IMR 4350 | <<locked>> | 80% | 37,449 psi | 59% | 2326 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,004 psi | 67% | 2415 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 33,591 psi | 53% | 2277 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 51,256 psi | 80% | 2582 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,240 psi | 77% | 2546 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 48,428 psi | 76% | 2631 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 52,982 psi | 83% | 2526 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,168 psi | 77% | 2497 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,075 psi | 64% | 2379 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,320 psi | 62% | 2362 fps | 96.7% |
| Lovex S071 | <<locked>> | 88% | 31,908 psi | 50% | 2244 fps | 95% |
| Norma 201 | <<locked>> | 80% | 53,577 psi | 84% | 2549 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,925 psi | 85% | 2546 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,443 psi | 77% | 2546 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,800 psi | 66% | 2451 fps | 95.1% |
| Norma MRP | <<locked>> | 88% | 37,898 psi | 59% | 2467 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 37,594 psi | 59% | 2379 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 49,226 psi | 77% | 2562 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,761 psi | 75% | 2628 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,419 psi | 57% | 2369 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 92% | 39,001 psi | 61% | 2444 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1467 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,543 psi | 75% | 2500 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,548 psi | 84% | 2661 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,627 psi | 68% | 2549 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,579 psi | 59% | 2405 fps | 98.3% |
| ReloadSwiss RS 70 | 52.8 gr | 80% | 36,390 psi | 57% | 2405 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,536 psi | 59% | 2487 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 51,242 psi | 80% | 2510 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,933 psi | 70% | 2461 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,440 psi | 71% | 2487 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 40,045 psi | 63% | 2441 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,061 psi | 66% | 2392 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,075 psi | 64% | 2379 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 49,168 psi | 77% | 2497 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,320 psi | 62% | 2362 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,382 psi | 71% | 2507 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,620 psi | 82% | 2575 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,969 psi | 85% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,803 psi | 72% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,219 psi | 63% | 2326 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,308 psi | 66% | 2490 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 53,882 psi | 84% | 2484 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,179 psi | 71% | 2461 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,458 psi | 78% | 2530 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 34,243 psi | 54% | 2349 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,667 psi | 61% | 2385 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 40,321 psi | 63% | 2425 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 80% | 51,155 psi | 80% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,242 psi | 80% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,459 psi | 79% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,044 psi | 61% | 2326 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,379 psi | 63% | 2402 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 92% | 38,841 psi | 61% | 2382 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 50,096 psi | 79% | 2500 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,176 psi | 65% | 2448 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 30,516 psi | 48% | 2260 fps | 97.1% |
| Vihtavuori N560 | <<locked>> | 98% | 49,690 psi | 78% | 2677 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,029 psi | 60% | 2349 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,656 psi | 67% | 2484 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,961 psi | 39% | 2175 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,944 psi | 64% | 2428 fps | 95% |
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 99 powders for .300 WSM loaded with the .308 | 200gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,831 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,831 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. Alliant Reloder-26, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .300 WSM with the .308 | 200gr | Barnes X S 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.