Load Specifications
Bullet:.308 | 181gr | RWS H-Mantel
Bullet Manufacturer:RWS
Bullet Weight:181 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:1:14.0
Load data in caliber .300 WSM with .308 | 181gr | RWS H-Mantel 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 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% | 54,259 psi | 85% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,450 psi | 90% | 2785 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,174 psi | 90% | 2762 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,501 psi | 76% | 2726 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 54,505 psi | 85% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,520 psi | 85% | 2835 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 57,363 psi | 90% | 2818 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,911 psi | 86% | 2772 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 2874 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,188 psi | 88% | 2766 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 57,537 psi | 90% | 2943 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,477 psi | 87% | 2795 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,753 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,463 psi | 87% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,840 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 2861 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 2802 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 2749 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,972 psi | 63% | 2661 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 2933 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,232 psi | 90% | 2838 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,304 psi | 88% | 2812 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 2802 fps | 96.6% |
| Bofors RP7 | <<locked>> | 92% | 55,898 psi | 88% | 2792 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,348 psi | 90% | 2740 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,825 psi | 87% | 2795 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,797 psi | 89% | 2825 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,795 psi | 86% | 2854 fps | 99% |
| Hodgdon H4350 | <<locked>> | 94% | 55,434 psi | 87% | 2822 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 82% | 54,549 psi | 85% | 2776 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,709 psi | 87% | 2818 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,404 psi | 85% | 2812 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,450 psi | 90% | 2930 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 57% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,433 psi | 85% | 2762 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,058 psi | 89% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,305 psi | 90% | 2795 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,130 psi | 88% | 2769 fps | 99% |
| IMR 4350 | <<locked>> | 96% | 56,420 psi | 88% | 2818 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,653 psi | 90% | 2818 fps | 99.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,738 psi | 87% | 2838 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,217 psi | 90% | 2841 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,347 psi | 87% | 2802 fps | 96% |
| IMR 8208 XBR | <<locked>> | 82% | 56,188 psi | 88% | 2766 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,696 psi | 90% | 2792 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,376 psi | 88% | 2743 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,650 psi | 86% | 2749 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,392 psi | 90% | 2815 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 54,926 psi | 86% | 2799 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,321 psi | 63% | 2579 fps | 97.1% |
| Norma 201 | <<locked>> | 84% | 56,101 psi | 88% | 2762 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,739 psi | 89% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,042 psi | 86% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,174 psi | 90% | 2874 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 51,256 psi | 80% | 2884 fps | 98.5% |
| Norma URP | <<locked>> | 96% | 57,159 psi | 90% | 2877 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,622 psi | 87% | 2825 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2907 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 96% | 55,680 psi | 87% | 2874 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,311 psi | 74% | 2756 fps | 96.9% |
| Ramshot TAC | <<locked>> | 82% | 56,115 psi | 88% | 2789 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,188 psi | 88% | 2805 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,884 psi | 89% | 2812 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,666 psi | 89% | 2881 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,420 psi | 88% | 2913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,331 psi | 85% | 2861 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,956 psi | 89% | 2943 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 56,811 psi | 89% | 2733 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,710 psi | 89% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,144 psi | 88% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,230 psi | 85% | 2795 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2848 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 92% | 55,898 psi | 88% | 2792 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,392 psi | 90% | 2815 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,696 psi | 90% | 2792 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,650 psi | 86% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,926 psi | 86% | 2799 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,128 psi | 85% | 2812 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,882 psi | 86% | 2769 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,709 psi | 87% | 2789 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,956 psi | 89% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,667 psi | 90% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,479 psi | 90% | 2769 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2841 fps | 97.6% |
| Somchem S335 | <<locked>> | 84% | 56,710 psi | 89% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,578 psi | 86% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,318 psi | 88% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 55,941 psi | 88% | 2785 fps | 95.8% |
| Somchem S365 | <<locked>> | 98% | 55,695 psi | 87% | 2874 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2825 fps | 98.5% |
| Unknown powder | <<locked>> | 92% | 54,302 psi | 85% | 2831 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 57,043 psi | 89% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,753 psi | 89% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,449 psi | 88% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,551 psi | 90% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,853 psi | 86% | 2802 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2661 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 86% | 56,057 psi | 88% | 2756 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,042 psi | 86% | 2848 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,995 psi | 80% | 2825 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,579 psi | 87% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,795 psi | 86% | 2854 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,133 psi | 64% | 2792 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 2851 fps | 97.9% |
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% | 47,732 psi | 75% | 2598 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,664 psi | 84% | 2740 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,176 psi | 65% | 2493 fps | 95.3% |
| Accurate 3100 | <<locked>> | 90% | 34,621 psi | 54% | 2457 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 45,165 psi | 71% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,750 psi | 53% | 2451 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 80% | 50,488 psi | 79% | 2717 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,047 psi | 67% | 2572 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 46,035 psi | 72% | 2707 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,576 psi | 82% | 2713 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,775 psi | 73% | 2772 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,236 psi | 68% | 2598 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,093 psi | 72% | 2657 fps | 99.7% |
| Alliant Reloder-16 | 51.7 gr | 80% | 33,460 psi | 52% | 2461 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,550 psi | 59% | 2585 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,295 psi | 71% | 2697 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,397 psi | 71% | 2746 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,702 psi | 43% | 2329 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,346 psi | 55% | 2546 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,575 psi | 49% | 2493 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,183 psi | 79% | 2730 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 43,163 psi | 68% | 2605 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 45,397 psi | 71% | 2746 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 40,828 psi | 64% | 2526 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,969 psi | 85% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,257 psi | 82% | 2743 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,758 psi | 69% | 2612 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 80% | 38,972 psi | 61% | 2569 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 43,323 psi | 68% | 2612 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 51,068 psi | 80% | 2723 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,980 psi | 49% | 2365 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,802 psi | 70% | 2661 fps | 100% |
| Hodgdon Superformance | 61.8 gr | 84% | 40,089 psi | 63% | 2618 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,368 psi | 71% | 2615 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,369 psi | 74% | 2644 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,235 psi | 66% | 2549 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,727 psi | 65% | 2520 fps | 96.3% |
| IMR 4350 | <<locked>> | 86% | 41,321 psi | 65% | 2559 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,856 psi | 62% | 2507 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 29,718 psi | 47% | 2333 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 47,282 psi | 74% | 2687 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,069 psi | 82% | 2749 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 52,576 psi | 82% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,386 psi | 79% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,937 psi | 78% | 2648 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,353 psi | 71% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,405 psi | 59% | 2461 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 37,942 psi | 59% | 2490 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 35,476 psi | 56% | 2477 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 49,574 psi | 78% | 2664 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,125 psi | 79% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,469 psi | 71% | 2648 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 46,731 psi | 73% | 2700 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 38,914 psi | 61% | 2644 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 33,823 psi | 53% | 2451 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 45,498 psi | 71% | 2667 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 50,720 psi | 79% | 2838 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 82% | 35,085 psi | 55% | 2487 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 43,961 psi | 69% | 2694 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 52,605 psi | 82% | 2736 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,620 psi | 82% | 2753 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 43% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,961 psi | 69% | 2595 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,545 psi | 78% | 2772 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,943 psi | 63% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,518 psi | 53% | 2467 fps | 96.3% |
| ReloadSwiss RS 70 | 56.6 gr | 80% | 32,996 psi | 52% | 2467 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 53,693 psi | 84% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,108 psi | 74% | 2618 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,553 psi | 64% | 2549 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 50,662 psi | 79% | 2736 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 44,150 psi | 69% | 2677 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 40,828 psi | 64% | 2526 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,405 psi | 59% | 2461 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,386 psi | 79% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,353 psi | 71% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,942 psi | 59% | 2490 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,756 psi | 65% | 2605 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,329 psi | 80% | 2717 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,124 psi | 77% | 2687 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,386 psi | 79% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,366 psi | 66% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,044 psi | 61% | 2457 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,714 psi | 69% | 2674 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,256 psi | 79% | 2605 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,111 psi | 80% | 2707 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,249 psi | 65% | 2556 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 52,344 psi | 82% | 2730 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 30,400 psi | 48% | 2408 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 39,421 psi | 62% | 2556 fps | 95% |
| Unknown powder | <<locked>> | 80% | 36,579 psi | 57% | 2503 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 80% | 47,688 psi | 75% | 2543 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,065 psi | 74% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,833 psi | 73% | 2592 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,230 psi | 55% | 2408 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 36,622 psi | 57% | 2480 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 98% | 42,685 psi | 67% | 2608 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 46,427 psi | 73% | 2615 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,260 psi | 58% | 2523 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 28,195 psi | 44% | 2349 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,693 psi | 54% | 2428 fps | 98.9% |
| Winchester 760 | <<locked>> | 80% | 38,972 psi | 61% | 2569 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,049 psi | 41% | 2349 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,035 psi | 72% | 2674 fps | 95.7% |
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 115 powders for .300 WSM loaded with the .308 | 181gr | RWS H-Mantel. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,716 fps to 2,943 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 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 181.0 gr projectile in 0.308" calls for a 1:14.0 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 | 181gr | RWS H-Mantel they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Hodgdon H4831, Hodgdon Retumbo 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.