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:1:13.0
Load data in caliber .300 WSM with .308 | 180gr | Speer Boat-Tail bullet and 106 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 2015 | <<locked>> | 82% | 57,638 psi | 90% | 2703 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,072 psi | 89% | 2733 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,259 psi | 87% | 2749 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2723 fps | 98.6% |
| Accurate 4064 | <<locked>> | 88% | 57,246 psi | 90% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,824 psi | 84% | 2835 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 52,257 psi | 82% | 2910 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 84% | 56,623 psi | 89% | 2815 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,505 psi | 85% | 2772 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2871 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,463 psi | 87% | 2762 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,261 psi | 90% | 2733 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 57,087 psi | 89% | 2946 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,781 psi | 86% | 2792 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,317 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,752 psi | 86% | 2890 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,130 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2858 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,747 psi | 75% | 2795 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,179 psi | 71% | 2749 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,508 psi | 62% | 2654 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 2930 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,797 psi | 89% | 2838 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 55,579 psi | 87% | 2808 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,747 psi | 75% | 2795 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 55,288 psi | 87% | 2789 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,913 psi | 89% | 2740 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,419 psi | 87% | 2795 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,101 psi | 88% | 2822 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 56,536 psi | 89% | 2887 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 92% | 56,623 psi | 89% | 2848 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 84% | 57,290 psi | 90% | 2822 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,042 psi | 86% | 2815 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 57,450 psi | 90% | 2861 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,840 psi | 89% | 2927 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 56% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,056 psi | 86% | 2779 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,317 psi | 85% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,406 psi | 90% | 2802 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,797 psi | 89% | 2785 fps | 99% |
| IMR 4350 | <<locked>> | 96% | 55,782 psi | 87% | 2818 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,000 psi | 89% | 2818 fps | 99% |
| IMR 4831 | <<locked>> | 96% | 54,259 psi | 85% | 2825 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 56,768 psi | 89% | 2841 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2799 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 82% | 55,463 psi | 87% | 2762 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,985 psi | 89% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,738 psi | 87% | 2740 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 57,392 psi | 90% | 2795 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,768 psi | 89% | 2812 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 54,534 psi | 85% | 2799 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,769 psi | 62% | 2575 fps | 96.8% |
| Norma 201 | <<locked>> | 84% | 55,405 psi | 87% | 2759 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,043 psi | 88% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,607 psi | 86% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,521 psi | 89% | 2867 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2884 fps | 98.4% |
| Norma URP | <<locked>> | 96% | 56,434 psi | 88% | 2874 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,245 psi | 87% | 2828 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 55,013 psi | 86% | 2871 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 55,738 psi | 87% | 2789 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,506 psi | 87% | 2802 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,246 psi | 88% | 2808 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,202 psi | 88% | 2884 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,666 psi | 87% | 2913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 57,479 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,318 psi | 88% | 2940 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 56,362 psi | 88% | 2736 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,014 psi | 88% | 2759 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,709 psi | 87% | 2805 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 2844 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2844 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 55,288 psi | 87% | 2789 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,768 psi | 89% | 2812 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,985 psi | 89% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 57,392 psi | 90% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,534 psi | 85% | 2799 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 57,116 psi | 90% | 2861 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,447 psi | 85% | 2769 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,332 psi | 87% | 2792 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,521 psi | 89% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,290 psi | 90% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,913 psi | 89% | 2766 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,823 psi | 83% | 2838 fps | 97.4% |
| Somchem S335 | <<locked>> | 84% | 56,057 psi | 88% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,940 psi | 85% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,680 psi | 87% | 2799 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,926 psi | 86% | 2871 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2822 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 84% | 56,927 psi | 89% | 2674 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,304 psi | 88% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,550 psi | 89% | 2733 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,174 psi | 90% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,984 psi | 86% | 2815 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,572 psi | 73% | 2687 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 55,941 psi | 88% | 2759 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,824 psi | 86% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,682 psi | 90% | 2871 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,285 psi | 79% | 2822 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,984 psi | 86% | 2789 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,565 psi | 89% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,536 psi | 89% | 2887 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,640 psi | 64% | 2785 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,347 psi | 87% | 2799 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,604 psi | 79% | 2756 fps | 96.7% |
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% | 54,128 psi | 85% | 2657 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,210 psi | 74% | 2598 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,469 psi | 71% | 2585 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 36,390 psi | 57% | 2503 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 44,701 psi | 70% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,330 psi | 52% | 2448 fps | 96.6% |
| Accurate High Country | <<locked>> | 98% | 48,646 psi | 76% | 2848 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 50,096 psi | 79% | 2717 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,685 psi | 67% | 2572 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 45,484 psi | 71% | 2700 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,185 psi | 82% | 2713 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,606 psi | 84% | 2687 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,137 psi | 72% | 2766 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,627 psi | 67% | 2592 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,687 psi | 72% | 2657 fps | 99.6% |
| Alliant Reloder-16 | 51.4 gr | 80% | 33,098 psi | 52% | 2457 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,202 psi | 58% | 2582 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,759 psi | 70% | 2694 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 44,831 psi | 70% | 2743 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,282 psi | 43% | 2323 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,911 psi | 55% | 2539 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,315 psi | 52% | 2549 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,588 psi | 78% | 2726 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,757 psi | 67% | 2605 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 44,831 psi | 70% | 2743 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 40,451 psi | 63% | 2523 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,592 psi | 84% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,576 psi | 81% | 2740 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,381 psi | 68% | 2612 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 37,826 psi | 59% | 2549 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 43,787 psi | 69% | 2625 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 50,604 psi | 79% | 2723 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,661 psi | 48% | 2362 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,094 psi | 74% | 2707 fps | 100% |
| Hodgdon Superformance | 61.5 gr | 84% | 39,784 psi | 62% | 2618 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 42% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,385 psi | 76% | 2674 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,850 psi | 80% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,860 psi | 70% | 2605 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,050 psi | 74% | 2628 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 40,988 psi | 64% | 2559 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,494 psi | 62% | 2503 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 32,372 psi | 51% | 2408 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 46,818 psi | 73% | 2687 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 51,503 psi | 81% | 2746 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 52,185 psi | 82% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,951 psi | 78% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,559 psi | 78% | 2644 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,962 psi | 70% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,057 psi | 58% | 2457 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 37,391 psi | 59% | 2484 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 34,954 psi | 55% | 2474 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 49,168 psi | 77% | 2664 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,443 psi | 77% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,034 psi | 71% | 2648 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 46,180 psi | 72% | 2697 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 38,609 psi | 61% | 2641 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 33,417 psi | 52% | 2448 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 44,904 psi | 70% | 2664 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 37,188 psi | 58% | 2546 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 52,040 psi | 82% | 2733 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,011 psi | 82% | 2749 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 43% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,395 psi | 68% | 2592 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,820 psi | 77% | 2769 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,552 psi | 62% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,967 psi | 52% | 2464 fps | 96% |
| ReloadSwiss RS 70 | 57.7 gr | 82% | 34,998 psi | 55% | 2526 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 53,243 psi | 83% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,702 psi | 73% | 2615 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,176 psi | 63% | 2549 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 50,343 psi | 79% | 2736 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 43,758 psi | 69% | 2677 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 40,451 psi | 63% | 2523 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,057 psi | 58% | 2457 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,951 psi | 78% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,962 psi | 70% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,391 psi | 59% | 2484 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,162 psi | 65% | 2598 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,676 psi | 79% | 2713 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,486 psi | 76% | 2684 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,980 psi | 78% | 2602 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,989 psi | 66% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,522 psi | 60% | 2451 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,337 psi | 68% | 2671 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 49,879 psi | 78% | 2605 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,444 psi | 79% | 2703 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,886 psi | 64% | 2552 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 30,037 psi | 47% | 2405 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 41,655 psi | 65% | 2605 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 50,459 psi | 79% | 2589 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,601 psi | 73% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,920 psi | 74% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,783 psi | 61% | 2484 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,809 psi | 55% | 2451 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 43,642 psi | 68% | 2635 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 52,504 psi | 82% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,426 psi | 71% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,418 psi | 54% | 2451 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 29,733 psi | 47% | 2402 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,214 psi | 54% | 2421 fps | 98.7% |
| Winchester 748 | <<locked>> | 80% | 52,895 psi | 83% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 38,014 psi | 60% | 2552 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,701 psi | 40% | 2343 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,399 psi | 76% | 2694 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 44,106 psi | 69% | 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 106 powders for .300 WSM loaded with the .308 | 180gr | Speer Boat-Tail. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,946 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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 | 180gr | Speer Boat-Tail 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.