Load Specifications
Bullet:.308 | 180gr | Speer RN
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:1:16.0
Load data in caliber .300 WSM with .308 | 180gr | Speer RN bullet and 104 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-17.
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% | 55,709 psi | 87% | 2723 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,290 psi | 90% | 2792 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 2769 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 55,869 psi | 88% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,463 psi | 88% | 2881 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,230 psi | 87% | 2805 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,217 psi | 88% | 2808 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 2920 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,435 psi | 90% | 2799 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,376 psi | 87% | 2930 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,898 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,203 psi | 90% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,985 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,795 psi | 86% | 2910 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 2907 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 2844 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,224 psi | 74% | 2789 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,278 psi | 65% | 2703 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2979 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,882 psi | 86% | 2818 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,861 psi | 72% | 2769 fps | 96% |
| Bofors RP3 | <<locked>> | 88% | 57,725 psi | 90% | 2844 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 2844 fps | 97.1% |
| Bofors RP7 | <<locked>> | 92% | 57,072 psi | 89% | 2828 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,261 psi | 90% | 2831 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,679 psi | 86% | 2812 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 54,897 psi | 86% | 2874 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 55,027 psi | 86% | 2835 fps | 98.1% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 2858 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 55,825 psi | 87% | 2812 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,261 psi | 90% | 2854 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,796 psi | 87% | 2848 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,274 psi | 87% | 2913 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 57% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,666 psi | 89% | 2812 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,434 psi | 88% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,782 psi | 87% | 2792 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,071 psi | 86% | 2772 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,404 psi | 85% | 2808 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,434 psi | 87% | 2805 fps | 99% |
| IMR 4831 | <<locked>> | 96% | 56,666 psi | 89% | 2867 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,013 psi | 86% | 2828 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,956 psi | 89% | 2848 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 82% | 57,435 psi | 90% | 2799 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,477 psi | 87% | 2779 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,551 psi | 90% | 2779 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,883 psi | 88% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,201 psi | 87% | 2799 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 56,579 psi | 89% | 2841 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,843 psi | 66% | 2625 fps | 97.6% |
| Norma 201 | <<locked>> | 84% | 57,363 psi | 90% | 2795 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,418 psi | 85% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,492 psi | 89% | 2838 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,172 psi | 86% | 2861 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 53,127 psi | 83% | 2933 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 55,100 psi | 86% | 2864 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,159 psi | 90% | 2864 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,508 psi | 90% | 2917 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,642 psi | 68% | 2707 fps | 96.1% |
| Ramshot TAC | <<locked>> | 82% | 57,566 psi | 90% | 2831 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,522 psi | 90% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 58% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,752 psi | 86% | 2799 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,505 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,215 psi | 85% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,231 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,882 psi | 86% | 2930 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,650 psi | 86% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,128 psi | 85% | 2792 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,695 psi | 87% | 2835 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 2894 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 92% | 57,072 psi | 89% | 2828 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,201 psi | 87% | 2799 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,477 psi | 87% | 2779 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,883 psi | 88% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,579 psi | 89% | 2841 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,666 psi | 87% | 2851 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,159 psi | 88% | 2808 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,058 psi | 89% | 2825 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,810 psi | 86% | 2680 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,579 psi | 87% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,013 psi | 86% | 2753 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 2887 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 54,418 psi | 85% | 2677 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,869 psi | 88% | 2795 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,682 psi | 90% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 57,580 psi | 90% | 2828 fps | 96.3% |
| Somchem S365 | <<locked>> | 98% | 57,537 psi | 90% | 2913 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 2867 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 55,303 psi | 87% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,723 psi | 86% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,085 psi | 86% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,608 psi | 87% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,450 psi | 90% | 2858 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 2733 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 86% | 56,768 psi | 89% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,463 psi | 88% | 2864 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,721 psi | 83% | 2864 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,708 psi | 84% | 2920 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,217 psi | 90% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,172 psi | 86% | 2881 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,511 psi | 67% | 2838 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,348 psi | 90% | 2835 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2805 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 2495 | <<locked>> | 80% | 48,921 psi | 77% | 2631 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,065 psi | 74% | 2628 fps | 97% |
| Accurate 3100 | <<locked>> | 90% | 35,723 psi | 56% | 2497 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,340 psi | 73% | 2635 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,925 psi | 55% | 2490 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,779 psi | 81% | 2753 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,019 psi | 69% | 2608 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,425 psi | 70% | 2694 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,838 psi | 84% | 2749 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,167 psi | 75% | 2815 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,266 psi | 69% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,355 psi | 74% | 2697 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,461 psi | 54% | 2503 fps | 97.4% |
| Alliant Reloder-17 | 57.5 gr | 80% | 38,754 psi | 61% | 2628 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,787 psi | 69% | 2684 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,932 psi | 69% | 2733 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,701 psi | 42% | 2310 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,200 psi | 54% | 2533 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,605 psi | 51% | 2539 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,503 psi | 81% | 2769 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,105 psi | 68% | 2717 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 44,440 psi | 70% | 2641 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,932 psi | 69% | 2733 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 39,392 psi | 62% | 2513 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,679 psi | 84% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,904 psi | 70% | 2651 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 36,912 psi | 58% | 2536 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 42,714 psi | 67% | 2615 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 98% | 51,706 psi | 81% | 2799 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,359 psi | 82% | 2762 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,879 psi | 50% | 2402 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,747 psi | 76% | 2743 fps | 100% |
| Hodgdon Superformance | 62.3 gr | 82% | 38,624 psi | 61% | 2602 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,038 psi | 78% | 2713 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,721 psi | 83% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,282 psi | 73% | 2641 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,501 psi | 76% | 2664 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 39,798 psi | 62% | 2546 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,683 psi | 64% | 2539 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 33,649 psi | 53% | 2448 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 48,559 psi | 76% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,314 psi | 79% | 2740 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 53,838 psi | 84% | 2749 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,938 psi | 81% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,923 psi | 80% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,456 psi | 73% | 2638 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,319 psi | 60% | 2497 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 36,521 psi | 57% | 2474 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 34,490 psi | 54% | 2467 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,647 psi | 79% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,242 psi | 80% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,702 psi | 73% | 2684 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,947 psi | 70% | 2684 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 37,666 psi | 59% | 2628 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,925 psi | 55% | 2490 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 46,818 psi | 73% | 2707 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,187 psi | 57% | 2530 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 40,524 psi | 64% | 2641 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 53,838 psi | 84% | 2776 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,751 psi | 84% | 2789 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 43% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,005 psi | 71% | 2635 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,937 psi | 80% | 2812 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,205 psi | 65% | 2684 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,534 psi | 54% | 2507 fps | 96.8% |
| ReloadSwiss RS 70 | 58.4 gr | 80% | 33,982 psi | 53% | 2510 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 48,196 psi | 76% | 2651 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,829 psi | 66% | 2589 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,066 psi | 77% | 2726 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 42,685 psi | 67% | 2667 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 39,392 psi | 62% | 2513 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,319 psi | 60% | 2497 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,938 psi | 81% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,456 psi | 73% | 2638 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,521 psi | 57% | 2474 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,873 psi | 67% | 2641 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,649 psi | 83% | 2753 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,256 psi | 79% | 2723 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,532 psi | 81% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,439 psi | 68% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,463 psi | 59% | 2438 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,279 psi | 66% | 2661 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,314 psi | 80% | 2635 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,373 psi | 82% | 2743 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,264 psi | 66% | 2589 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 53,766 psi | 84% | 2772 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 31,430 psi | 49% | 2448 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,683 psi | 64% | 2595 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,011 psi | 82% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,298 psi | 76% | 2618 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,588 psi | 76% | 2635 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,306 psi | 63% | 2523 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,289 psi | 57% | 2490 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 42,598 psi | 67% | 2625 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,905 psi | 74% | 2628 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,781 psi | 56% | 2490 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,240 psi | 46% | 2388 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 98% | 49,966 psi | 78% | 2858 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,650 psi | 56% | 2464 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,086 psi | 58% | 2539 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,803 psi | 42% | 2395 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,183 psi | 79% | 2733 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,948 psi | 72% | 2690 fps | 95.8% |
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 104 powders for .300 WSM loaded with the .308 | 180gr | Speer RN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,979 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 1:16.0 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-17 rank at the top here: for .300 WSM with the .308 | 180gr | Speer RN 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.