Load Specifications
Bullet:.308 | 190gr | Speer TB
Bullet Manufacturer:Speer
Bullet Weight:190 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 | 190gr | Speer TB bullet and 107 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-16 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.
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% | 54,534 psi | 85% | 2618 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,682 psi | 90% | 2713 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,261 psi | 90% | 2690 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,718 psi | 76% | 2661 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 54,621 psi | 86% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,984 psi | 86% | 2769 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 57,682 psi | 90% | 2746 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,274 psi | 87% | 2703 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 2808 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,391 psi | 88% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,128 psi | 85% | 2818 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,680 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,941 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,840 psi | 88% | 2822 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,130 psi | 90% | 2851 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 2792 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,617 psi | 76% | 2736 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,847 psi | 72% | 2684 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,277 psi | 63% | 2605 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 2861 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,653 psi | 90% | 2766 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,628 psi | 70% | 2664 fps | 95.9% |
| Bofors RP3 | <<locked>> | 88% | 56,405 psi | 88% | 2736 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,617 psi | 76% | 2736 fps | 97.1% |
| Bofors RP7 | <<locked>> | 92% | 56,072 psi | 88% | 2723 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,711 psi | 90% | 2671 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,086 psi | 88% | 2723 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,232 psi | 90% | 2759 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,984 psi | 86% | 2785 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 94% | 55,709 psi | 87% | 2756 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 82% | 54,766 psi | 86% | 2707 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,912 psi | 88% | 2746 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,723 psi | 86% | 2740 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,624 psi | 90% | 2858 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 56% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,723 psi | 86% | 2690 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,261 psi | 90% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,406 psi | 90% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,550 psi | 89% | 2703 fps | 99.2% |
| IMR 4350 | <<locked>> | 96% | 56,579 psi | 89% | 2749 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,331 psi | 85% | 2697 fps | 98.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 2769 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,421 psi | 90% | 2769 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,738 psi | 87% | 2736 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,488 psi | 81% | 2772 fps | 96% |
| IMR 8208 XBR | <<locked>> | 82% | 56,391 psi | 88% | 2690 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,317 psi | 85% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,565 psi | 89% | 2671 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,694 psi | 86% | 2677 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,638 psi | 90% | 2743 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 55,259 psi | 87% | 2733 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,495 psi | 63% | 2520 fps | 97.5% |
| Norma 201 | <<locked>> | 84% | 56,347 psi | 88% | 2690 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,000 psi | 89% | 2687 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,230 psi | 87% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,624 psi | 90% | 2805 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2818 fps | 98.8% |
| Norma URP | <<locked>> | 96% | 57,334 psi | 90% | 2805 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,854 psi | 88% | 2756 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,926 psi | 86% | 2838 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 96% | 56,115 psi | 88% | 2808 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2697 fps | 97.3% |
| Ramshot TAC | <<locked>> | 82% | 56,434 psi | 88% | 2720 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,463 psi | 88% | 2733 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,840 psi | 58% | 1703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,101 psi | 89% | 2740 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,985 psi | 89% | 2808 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,594 psi | 89% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,737 psi | 86% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,305 psi | 90% | 2874 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,043 psi | 89% | 2661 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,985 psi | 89% | 2690 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,521 psi | 89% | 2733 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,476 psi | 85% | 2726 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,143 psi | 85% | 2779 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 92% | 56,072 psi | 88% | 2723 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,638 psi | 90% | 2743 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,317 psi | 85% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,694 psi | 86% | 2677 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,259 psi | 87% | 2733 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,578 psi | 86% | 2743 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,129 psi | 86% | 2700 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,927 psi | 88% | 2717 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,290 psi | 90% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,708 psi | 86% | 2582 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,609 psi | 90% | 2700 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 2772 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 56,942 psi | 89% | 2618 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,882 psi | 86% | 2687 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,652 psi | 89% | 2730 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,333 psi | 88% | 2723 fps | 96.2% |
| Somchem S365 | <<locked>> | 98% | 56,057 psi | 88% | 2802 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 2756 fps | 98.8% |
| Unknown powder | <<locked>> | 92% | 54,578 psi | 86% | 2759 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 86% | 57,363 psi | 90% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,956 psi | 89% | 2644 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,797 psi | 89% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,636 psi | 86% | 2664 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,926 psi | 86% | 2730 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,629 psi | 72% | 2598 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 86% | 56,260 psi | 88% | 2680 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,405 psi | 87% | 2776 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 2756 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,811 psi | 87% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,984 psi | 86% | 2785 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,234 psi | 65% | 2726 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2782 fps | 98.2% |
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% | 48,022 psi | 75% | 2530 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 54,070 psi | 85% | 2667 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,408 psi | 65% | 2431 fps | 95.8% |
| Accurate 3100 | <<locked>> | 90% | 34,780 psi | 55% | 2402 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 45,440 psi | 71% | 2536 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,040 psi | 53% | 2395 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 80% | 50,865 psi | 80% | 2648 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,250 psi | 68% | 2507 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 43,410 psi | 68% | 2592 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,910 psi | 83% | 2644 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,934 psi | 74% | 2703 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,294 psi | 68% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,456 psi | 73% | 2595 fps | 99.8% |
| Alliant Reloder-16 | 50 gr | 80% | 33,649 psi | 53% | 2405 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,826 psi | 59% | 2526 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 42,815 psi | 67% | 2582 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 42,641 psi | 67% | 2625 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,121 psi | 41% | 2224 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,330 psi | 52% | 2434 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,792 psi | 50% | 2444 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,372 psi | 79% | 2661 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 42,047 psi | 66% | 2612 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 43,352 psi | 68% | 2539 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 42,641 psi | 67% | 2625 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 38,551 psi | 60% | 2415 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,259 psi | 85% | 2625 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,402 psi | 82% | 2671 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,976 psi | 69% | 2549 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 39,102 psi | 61% | 2503 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 84% | 40,901 psi | 64% | 2497 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 51,416 psi | 81% | 2657 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,183 psi | 49% | 2310 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,020 psi | 71% | 2595 fps | 100% |
| Hodgdon Superformance | 58.4 gr | 82% | 37,681 psi | 59% | 2503 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 42% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,571 psi | 71% | 2549 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,485 psi | 74% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,366 psi | 66% | 2484 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,858 psi | 66% | 2457 fps | 96.7% |
| IMR 4350 | <<locked>> | 84% | 39,073 psi | 61% | 2451 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,074 psi | 63% | 2448 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 29,907 psi | 47% | 2280 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,616 psi | 75% | 2621 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,359 psi | 82% | 2687 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 48,211 psi | 76% | 2717 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 52,910 psi | 83% | 2644 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,633 psi | 79% | 2621 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,154 psi | 79% | 2575 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,571 psi | 71% | 2539 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,623 psi | 59% | 2402 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 35,708 psi | 56% | 2379 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 33,489 psi | 52% | 2372 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 49,835 psi | 78% | 2595 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,140 psi | 79% | 2592 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,803 psi | 72% | 2582 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,034 psi | 69% | 2585 fps | 95.4% |
| Norma MRP | <<locked>> | 92% | 39,305 psi | 62% | 2589 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 34,055 psi | 53% | 2395 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 45,629 psi | 72% | 2598 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 47,529 psi | 74% | 2713 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 82% | 35,375 psi | 55% | 2434 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 41,046 psi | 64% | 2572 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 52,808 psi | 83% | 2667 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,765 psi | 83% | 2680 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,340 psi | 43% | 1516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,222 psi | 69% | 2533 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,835 psi | 78% | 2703 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,205 psi | 63% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,591 psi | 53% | 2408 fps | 96.8% |
| ReloadSwiss RS 70 | 54.7 gr | 80% | 33,098 psi | 52% | 2411 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 53,853 psi | 84% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,326 psi | 74% | 2549 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,872 psi | 64% | 2490 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 47,834 psi | 75% | 2618 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 41,553 psi | 65% | 2562 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 38,551 psi | 60% | 2415 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,623 psi | 59% | 2402 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,633 psi | 79% | 2621 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,571 psi | 71% | 2539 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,708 psi | 56% | 2379 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,003 psi | 66% | 2539 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,517 psi | 81% | 2648 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,371 psi | 77% | 2621 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,763 psi | 80% | 2533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,685 psi | 67% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,738 psi | 58% | 2346 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 41,147 psi | 64% | 2556 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 50,517 psi | 79% | 2533 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,256 psi | 80% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,510 psi | 65% | 2490 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 52,634 psi | 82% | 2667 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 30,632 psi | 48% | 2352 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 39,624 psi | 62% | 2497 fps | 95.5% |
| Unknown powder | <<locked>> | 80% | 36,883 psi | 58% | 2448 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 80% | 47,964 psi | 75% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,413 psi | 74% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,108 psi | 74% | 2526 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,549 psi | 56% | 2349 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 36,825 psi | 58% | 2421 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 96% | 40,190 psi | 63% | 2497 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 46,557 psi | 73% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,449 psi | 59% | 2464 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 82% | 28,326 psi | 44% | 2293 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,824 psi | 55% | 2369 fps | 99.1% |
| Winchester 760 | <<locked>> | 80% | 39,102 psi | 61% | 2503 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,107 psi | 41% | 2300 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,105 psi | 68% | 2556 fps | 95.2% |
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 119 powders for .300 WSM loaded with the .308 | 190gr | Speer TB. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,874 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,874 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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-16, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 190gr | Speer TB they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 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.