Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:180 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:1:12.5
Load data in caliber .300 WSM with .308 | 180gr | Nosler CT FailSafe 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-17 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 82% | 56,797 psi | 89% | 2687 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,304 psi | 88% | 2717 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,985 psi | 88% | 2769 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,637 psi | 87% | 2736 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,673 psi | 73% | 2697 fps | 98.3% |
| Accurate 4064 | <<locked>> | 88% | 56,202 psi | 88% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,666 psi | 89% | 2867 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 55,985 psi | 88% | 2799 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,797 psi | 89% | 2795 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2844 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,781 psi | 86% | 2746 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,043 psi | 88% | 2710 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,854 psi | 88% | 2920 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,911 psi | 84% | 2841 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,348 psi | 90% | 2822 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,389 psi | 85% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,319 psi | 90% | 2920 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,013 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,098 psi | 83% | 2831 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,702 psi | 73% | 2769 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,077 psi | 69% | 2723 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,783 psi | 61% | 2628 fps | 97% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 2900 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,680 psi | 87% | 2815 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,621 psi | 86% | 2789 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,702 psi | 73% | 2769 fps | 95.9% |
| Bofors RP7 | <<locked>> | 94% | 57,725 psi | 90% | 2815 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,231 psi | 88% | 2723 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,230 psi | 85% | 2772 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,259 psi | 87% | 2802 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 56,855 psi | 89% | 2884 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 96% | 57,232 psi | 90% | 2844 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 84% | 56,579 psi | 89% | 2805 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,363 psi | 90% | 2838 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,492 psi | 89% | 2844 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,666 psi | 87% | 2900 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 56% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,565 psi | 89% | 2792 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,419 psi | 87% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,637 psi | 87% | 2769 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,926 psi | 86% | 2749 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 54,839 psi | 86% | 2792 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,970 psi | 88% | 2792 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2812 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 55,811 psi | 87% | 2822 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,781 psi | 86% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,985 psi | 88% | 2769 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,071 psi | 86% | 2723 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,434 psi | 88% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,724 psi | 87% | 2789 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 56,985 psi | 89% | 2828 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,827 psi | 61% | 2549 fps | 96.4% |
| Norma 201 | <<locked>> | 84% | 54,694 psi | 86% | 2740 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,274 psi | 87% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,159 psi | 90% | 2831 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,593 psi | 87% | 2844 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2854 fps | 98% |
| Norma URP | <<locked>> | 96% | 55,332 psi | 87% | 2851 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,085 psi | 85% | 2805 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,595 psi | 90% | 2900 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,672 psi | 72% | 2720 fps | 96.1% |
| Ramshot TAC | <<locked>> | 82% | 54,679 psi | 86% | 2766 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,650 psi | 86% | 2782 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,448 psi | 87% | 2785 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,868 psi | 86% | 2858 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,578 psi | 86% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,159 psi | 88% | 2887 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,129 psi | 86% | 2917 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,535 psi | 87% | 2717 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,332 psi | 87% | 2743 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,505 psi | 85% | 2779 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 2815 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 2818 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 94% | 57,725 psi | 90% | 2815 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,724 psi | 87% | 2789 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,985 psi | 88% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,434 psi | 88% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,985 psi | 89% | 2828 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,304 psi | 88% | 2841 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,087 psi | 89% | 2799 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,201 psi | 85% | 2766 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,796 psi | 87% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,376 psi | 88% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,912 psi | 88% | 2743 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2815 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 55,376 psi | 87% | 2674 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,753 psi | 89% | 2785 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,737 psi | 86% | 2779 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2900 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2792 fps | 98% |
| Unknown powder | <<locked>> | 94% | 56,289 psi | 88% | 2858 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 82% | 57,696 psi | 90% | 2661 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,579 psi | 87% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,172 psi | 86% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,100 psi | 86% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,028 psi | 88% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,681 psi | 89% | 2828 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,752 psi | 86% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,043 psi | 89% | 2874 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2799 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,667 psi | 90% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,855 psi | 89% | 2884 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,726 psi | 62% | 2756 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 2822 fps | 97.4% |
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 2015 | <<locked>> | 80% | 53,272 psi | 83% | 2638 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,151 psi | 72% | 2575 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,199 psi | 82% | 2717 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,946 psi | 67% | 2523 fps | 95.5% |
| Accurate 3100 | <<locked>> | 92% | 35,679 psi | 56% | 2484 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 43,700 psi | 68% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,663 psi | 51% | 2428 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 80% | 49,385 psi | 77% | 2697 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,018 psi | 66% | 2552 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 47,630 psi | 75% | 2733 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,430 psi | 81% | 2697 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,663 psi | 83% | 2667 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,484 psi | 71% | 2746 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,672 psi | 70% | 2680 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,901 psi | 66% | 2572 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,947 psi | 70% | 2638 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,532 psi | 51% | 2438 fps | 96.2% |
| Alliant Reloder-17 | 54.4 gr | 80% | 36,419 psi | 57% | 2559 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,106 psi | 69% | 2671 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,743 psi | 69% | 2710 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,832 psi | 42% | 2300 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,243 psi | 54% | 2513 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,590 psi | 51% | 2523 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,733 psi | 76% | 2703 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 41,814 psi | 66% | 2579 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 43,743 psi | 69% | 2710 fps | 95% |
| Bofors RP7 | <<locked>> | 84% | 42,482 psi | 67% | 2556 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,866 psi | 83% | 2677 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,923 psi | 80% | 2723 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,525 psi | 67% | 2585 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 82% | 40,350 psi | 63% | 2598 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 44,701 psi | 70% | 2635 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 49,879 psi | 78% | 2707 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,066 psi | 47% | 2339 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,453 psi | 68% | 2635 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 41,727 psi | 65% | 2651 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 42% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,266 psi | 69% | 2595 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 45,963 psi | 72% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,176 psi | 65% | 2526 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,756 psi | 64% | 2497 fps | 95.8% |
| IMR 4350 | <<locked>> | 86% | 40,248 psi | 63% | 2536 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,914 psi | 61% | 2484 fps | 95.1% |
| IMR 4831 | <<locked>> | 82% | 30,618 psi | 48% | 2359 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 46,093 psi | 72% | 2667 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 51,430 psi | 81% | 2697 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,182 psi | 77% | 2674 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,878 psi | 77% | 2628 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,237 psi | 69% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,260 psi | 57% | 2434 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 39,276 psi | 62% | 2516 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 36,434 psi | 57% | 2500 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,182 psi | 76% | 2641 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,689 psi | 76% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,324 psi | 69% | 2625 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 45,469 psi | 71% | 2674 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 40,364 psi | 63% | 2674 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 32,779 psi | 51% | 2425 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 44,208 psi | 69% | 2644 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 36,332 psi | 57% | 2516 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 42,395 psi | 66% | 2657 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,227 psi | 80% | 2713 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,111 psi | 80% | 2730 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 43% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,801 psi | 67% | 2572 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,022 psi | 75% | 2746 fps | 99.8% |
| ReloadSwiss RS 60 | 54.4 gr | 80% | 38,711 psi | 61% | 2618 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,343 psi | 51% | 2441 fps | 95.6% |
| ReloadSwiss RS 70 | 56.6 gr | 82% | 34,185 psi | 54% | 2497 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 52,402 psi | 82% | 2674 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,963 psi | 72% | 2598 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,421 psi | 62% | 2530 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 49,414 psi | 77% | 2710 fps | 95% |
| Rottweil R 905 | <<locked>> | 96% | 45,730 psi | 72% | 2707 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 84% | 42,482 psi | 67% | 2556 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,260 psi | 57% | 2434 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,182 psi | 77% | 2674 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,237 psi | 69% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 39,276 psi | 62% | 2516 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,509 psi | 63% | 2579 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,024 psi | 78% | 2694 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,848 psi | 75% | 2667 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,458 psi | 78% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,510 psi | 65% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,971 psi | 60% | 2431 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,324 psi | 71% | 2703 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 48,907 psi | 77% | 2582 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,574 psi | 78% | 2684 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,972 psi | 63% | 2530 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 29,472 psi | 46% | 2382 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 40,770 psi | 64% | 2582 fps | 95.2% |
| Unknown powder | <<locked>> | 80% | 35,563 psi | 56% | 2480 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 80% | 54,418 psi | 85% | 2621 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,717 psi | 73% | 2530 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,948 psi | 72% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,701 psi | 72% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,229 psi | 54% | 2385 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 35,476 psi | 56% | 2454 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 80% | 45,136 psi | 71% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,085 psi | 57% | 2497 fps | 97% |
| Vihtavuori N555 | <<locked>> | 84% | 28,993 psi | 45% | 2375 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,634 psi | 53% | 2402 fps | 98.4% |
| Winchester 760 | <<locked>> | 82% | 40,350 psi | 63% | 2598 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,803 psi | 42% | 2375 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,672 psi | 70% | 2644 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 105 powders for .300 WSM loaded with the .308 | 180gr | Nosler CT FailSafe. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,920 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,920 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 56–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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-17, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 180gr | Nosler CT FailSafe 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.