Load Specifications
Bullet Manufacturer:Speer
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:1:15.0
Load data in caliber .300 WSM with .308 | 180gr | Speer Magnum Tip Soft Point bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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>> | 84% | 54,723 psi | 86% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,580 psi | 90% | 2779 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,168 psi | 77% | 2746 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 54,940 psi | 86% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,376 psi | 87% | 2861 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 54,360 psi | 85% | 2785 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,434 psi | 87% | 2792 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 2900 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,550 psi | 89% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,244 psi | 85% | 2910 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,057 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,376 psi | 88% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,217 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,595 psi | 90% | 2946 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2884 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2828 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,369 psi | 73% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,625 psi | 64% | 2684 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2956 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,143 psi | 85% | 2802 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,927 psi | 89% | 2831 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2828 fps | 96.9% |
| Bofors RP7 | <<locked>> | 92% | 56,391 psi | 88% | 2812 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,391 psi | 88% | 2815 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,319 psi | 90% | 2848 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,521 psi | 87% | 2881 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 55,912 psi | 88% | 2841 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 54,926 psi | 86% | 2795 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,202 psi | 88% | 2838 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,259 psi | 87% | 2838 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,172 psi | 85% | 2890 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 57% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,056 psi | 86% | 2785 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,566 psi | 90% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,638 psi | 90% | 2812 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,652 psi | 89% | 2792 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 57,087 psi | 89% | 2841 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,708 psi | 86% | 2789 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 2861 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,404 psi | 85% | 2815 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,144 psi | 88% | 2828 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 82% | 56,550 psi | 89% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,563 psi | 86% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,724 psi | 89% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,998 psi | 86% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,520 psi | 85% | 2785 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 55,608 psi | 87% | 2825 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,988 psi | 64% | 2602 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 56,521 psi | 89% | 2779 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,159 psi | 90% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,651 psi | 87% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,288 psi | 85% | 2841 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 52,069 psi | 82% | 2910 fps | 98.7% |
| Norma URP | <<locked>> | 96% | 57,624 psi | 90% | 2894 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,420 psi | 88% | 2851 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,593 psi | 87% | 2933 fps | 97% |
| Ramshot Hunter | <<locked>> | 96% | 56,623 psi | 89% | 2900 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,167 psi | 75% | 2785 fps | 97.1% |
| Ramshot TAC | <<locked>> | 82% | 56,594 psi | 89% | 2808 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,724 psi | 89% | 2825 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,840 psi | 58% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,334 psi | 90% | 2831 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,334 psi | 90% | 2904 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,232 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,998 psi | 86% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,780 psi | 84% | 2907 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 57,276 psi | 90% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,101 psi | 89% | 2779 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,739 psi | 89% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,839 psi | 86% | 2815 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 2867 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 92% | 56,391 psi | 88% | 2812 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,520 psi | 85% | 2785 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,563 psi | 86% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,998 psi | 86% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,608 psi | 87% | 2825 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,897 psi | 86% | 2835 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,405 psi | 87% | 2789 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,275 psi | 88% | 2808 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,653 psi | 90% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,795 psi | 86% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,404 psi | 85% | 2736 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,099 psi | 85% | 2864 fps | 97.8% |
| Somchem S335 | <<locked>> | 84% | 57,101 psi | 89% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,100 psi | 86% | 2779 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,898 psi | 89% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,608 psi | 89% | 2808 fps | 96% |
| Somchem S365 | <<locked>> | 98% | 56,463 psi | 88% | 2894 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2848 fps | 98.6% |
| Unknown powder | <<locked>> | 92% | 54,781 psi | 86% | 2851 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 57,522 psi | 90% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,261 psi | 90% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,043 psi | 89% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,839 psi | 86% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,332 psi | 87% | 2822 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,064 psi | 72% | 2684 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 86% | 56,608 psi | 89% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,724 psi | 87% | 2867 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 2848 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,173 psi | 88% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,521 psi | 87% | 2881 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,582 psi | 65% | 2812 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,896 psi | 84% | 2815 fps | 97.5% |
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% | 48,211 psi | 76% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,669 psi | 65% | 2513 fps | 95.5% |
| Accurate 3100 | <<locked>> | 90% | 35,041 psi | 55% | 2477 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,614 psi | 71% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,301 psi | 54% | 2474 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 51,140 psi | 80% | 2740 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,453 psi | 68% | 2592 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 46,659 psi | 73% | 2730 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,258 psi | 83% | 2736 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,355 psi | 74% | 2795 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,671 psi | 68% | 2618 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,731 psi | 73% | 2680 fps | 99.8% |
| Alliant Reloder-16 | 52.5 gr | 80% | 33,808 psi | 53% | 2484 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,072 psi | 60% | 2608 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 42,989 psi | 67% | 2664 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,178 psi | 68% | 2713 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,281 psi | 41% | 2293 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,736 psi | 53% | 2516 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,082 psi | 50% | 2520 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,749 psi | 80% | 2749 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 43,613 psi | 68% | 2625 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,178 psi | 68% | 2713 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 41,365 psi | 65% | 2549 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,852 psi | 83% | 2766 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,135 psi | 69% | 2631 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,494 psi | 62% | 2589 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 43,642 psi | 68% | 2628 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,735 psi | 81% | 2746 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,343 psi | 49% | 2385 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,237 psi | 71% | 2680 fps | 100% |
| Hodgdon Superformance | 62.8 gr | 84% | 40,683 psi | 64% | 2641 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 42% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,788 psi | 72% | 2635 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,688 psi | 75% | 2661 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,699 psi | 67% | 2569 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,119 psi | 66% | 2539 fps | 96.5% |
| IMR 4350 | <<locked>> | 84% | 39,160 psi | 61% | 2526 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,176 psi | 63% | 2526 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 30,110 psi | 47% | 2352 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 47,935 psi | 75% | 2710 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,620 psi | 82% | 2772 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 53,258 psi | 83% | 2736 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,082 psi | 80% | 2713 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,343 psi | 79% | 2664 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,788 psi | 72% | 2625 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,753 psi | 59% | 2480 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 38,290 psi | 60% | 2510 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 35,940 psi | 56% | 2497 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,024 psi | 78% | 2684 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,560 psi | 79% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,108 psi | 72% | 2671 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,266 psi | 69% | 2667 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 39,465 psi | 62% | 2664 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 34,345 psi | 54% | 2474 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,079 psi | 72% | 2687 fps | 99.8% |
| Ramshot Grand | <<locked>> | 96% | 47,921 psi | 75% | 2799 fps | 95% |
| Ramshot Hunter | <<locked>> | 82% | 35,563 psi | 56% | 2510 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 41,321 psi | 65% | 2654 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 53,127 psi | 83% | 2756 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,214 psi | 83% | 2772 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 43% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,295 psi | 69% | 2615 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,995 psi | 78% | 2792 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,466 psi | 63% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,852 psi | 53% | 2487 fps | 96.5% |
| ReloadSwiss RS 70 | 57.5 gr | 80% | 33,402 psi | 52% | 2490 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 54,215 psi | 85% | 2713 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,558 psi | 75% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,220 psi | 65% | 2572 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,225 psi | 76% | 2707 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 44,817 psi | 70% | 2700 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 82% | 41,365 psi | 65% | 2549 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,753 psi | 59% | 2480 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,082 psi | 80% | 2713 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,788 psi | 72% | 2625 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,290 psi | 60% | 2510 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,090 psi | 66% | 2621 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,866 psi | 81% | 2736 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,487 psi | 78% | 2707 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,879 psi | 80% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,830 psi | 67% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,985 psi | 58% | 2425 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,396 psi | 70% | 2697 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 50,676 psi | 79% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,663 psi | 81% | 2726 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,684 psi | 65% | 2572 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 53,098 psi | 83% | 2756 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 30,893 psi | 48% | 2431 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 40,089 psi | 63% | 2579 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 37,159 psi | 58% | 2526 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 80% | 48,225 psi | 76% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,543 psi | 75% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,253 psi | 74% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,650 psi | 56% | 2428 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 37,202 psi | 58% | 2503 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 98% | 43,221 psi | 68% | 2631 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,804 psi | 73% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,637 psi | 59% | 2543 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 28,543 psi | 45% | 2369 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,099 psi | 55% | 2448 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 39,494 psi | 62% | 2589 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,353 psi | 41% | 2372 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,424 psi | 68% | 2638 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 103 powders for .300 WSM loaded with the .308 | 180gr | Speer Magnum Tip Soft Point. Alliant Reloder-26 delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,956 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 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 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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 70, Hodgdon Superformance, Alliant Reloder-16 rank at the top here: for .300 WSM with the .308 | 180gr | Speer Magnum Tip Soft Point 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.