Load Specifications
Bullet Manufacturer:SAKO
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 | Sako Hammerhead 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, 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% | 54,882 psi | 86% | 2710 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,667 psi | 90% | 2782 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2749 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 55,071 psi | 86% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,492 psi | 87% | 2864 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 54,462 psi | 85% | 2789 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,550 psi | 87% | 2795 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 2904 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,652 psi | 89% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,360 psi | 85% | 2910 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,405 psi | 88% | 2897 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,188 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,492 psi | 89% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,318 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,696 psi | 90% | 2946 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2884 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2828 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,441 psi | 73% | 2776 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,683 psi | 64% | 2687 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 2959 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,244 psi | 85% | 2805 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,971 psi | 89% | 2831 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2828 fps | 96.9% |
| Bofors RP7 | <<locked>> | 92% | 56,492 psi | 89% | 2815 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,507 psi | 89% | 2815 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,435 psi | 90% | 2848 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,622 psi | 87% | 2881 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 56,014 psi | 88% | 2844 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 55,056 psi | 86% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,304 psi | 88% | 2838 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,376 psi | 87% | 2838 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,259 psi | 85% | 2894 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,230 psi | 57% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,187 psi | 86% | 2785 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,711 psi | 90% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,711 psi | 90% | 2815 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,710 psi | 89% | 2792 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 57,174 psi | 90% | 2844 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,810 psi | 86% | 2792 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 2861 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,317 psi | 85% | 2812 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2831 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 82% | 56,652 psi | 89% | 2785 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,694 psi | 86% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,840 psi | 89% | 2762 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,129 psi | 86% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,621 psi | 86% | 2789 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 55,709 psi | 87% | 2825 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,046 psi | 64% | 2605 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 56,594 psi | 89% | 2782 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,261 psi | 90% | 2779 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,738 psi | 87% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,375 psi | 85% | 2841 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 52,141 psi | 82% | 2913 fps | 98.7% |
| Norma URP | <<locked>> | 96% | 57,725 psi | 90% | 2897 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,521 psi | 89% | 2851 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,651 psi | 87% | 2933 fps | 97% |
| Ramshot Hunter | <<locked>> | 96% | 56,710 psi | 89% | 2904 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,211 psi | 76% | 2785 fps | 97.2% |
| Ramshot TAC | <<locked>> | 82% | 56,695 psi | 89% | 2812 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,840 psi | 89% | 2828 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,435 psi | 90% | 2831 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,464 psi | 90% | 2907 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,348 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,085 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,853 psi | 84% | 2910 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 57,435 psi | 90% | 2756 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,232 psi | 90% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,855 psi | 89% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,926 psi | 86% | 2818 fps | 96.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 2871 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 92% | 56,492 psi | 89% | 2815 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,621 psi | 86% | 2789 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,694 psi | 86% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,129 psi | 86% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,709 psi | 87% | 2825 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,013 psi | 86% | 2838 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,521 psi | 87% | 2792 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,391 psi | 88% | 2812 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,273 psi | 85% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,853 psi | 86% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,491 psi | 85% | 2740 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,186 psi | 85% | 2864 fps | 97.8% |
| Somchem S335 | <<locked>> | 84% | 57,174 psi | 90% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,201 psi | 87% | 2779 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,014 psi | 89% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,739 psi | 89% | 2812 fps | 96% |
| Somchem S365 | <<locked>> | 98% | 56,579 psi | 89% | 2897 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2851 fps | 98.6% |
| Unknown powder | <<locked>> | 92% | 54,882 psi | 86% | 2851 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 57,624 psi | 90% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,348 psi | 90% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,174 psi | 90% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,955 psi | 86% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,434 psi | 87% | 2822 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,151 psi | 72% | 2684 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 86% | 56,724 psi | 89% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,825 psi | 87% | 2871 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 2848 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,246 psi | 88% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,622 psi | 87% | 2881 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,887 psi | 66% | 2818 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,969 psi | 85% | 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% | 48,298 psi | 76% | 2618 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,713 psi | 65% | 2516 fps | 95.5% |
| Accurate 3100 | <<locked>> | 90% | 35,128 psi | 55% | 2480 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,730 psi | 72% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,258 psi | 54% | 2474 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 51,010 psi | 80% | 2736 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,569 psi | 68% | 2595 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 43,714 psi | 69% | 2674 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,113 psi | 83% | 2733 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,471 psi | 74% | 2795 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 43,613 psi | 68% | 2674 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,772 psi | 69% | 2618 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,601 psi | 73% | 2680 fps | 99.8% |
| Alliant Reloder-16 | 52.6 gr | 80% | 33,866 psi | 53% | 2484 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,130 psi | 60% | 2608 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,076 psi | 68% | 2664 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,250 psi | 68% | 2713 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,368 psi | 41% | 2297 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,794 psi | 53% | 2516 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,010 psi | 50% | 2516 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,850 psi | 80% | 2753 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 43,714 psi | 69% | 2625 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,250 psi | 68% | 2713 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 41,423 psi | 65% | 2549 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,968 psi | 83% | 2766 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,251 psi | 69% | 2635 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,595 psi | 62% | 2592 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 43,700 psi | 68% | 2631 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 51,590 psi | 81% | 2746 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,444 psi | 49% | 2388 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,310 psi | 71% | 2680 fps | 100% |
| Hodgdon Superformance | 62.9 gr | 84% | 40,770 psi | 64% | 2644 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,977 psi | 42% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,919 psi | 72% | 2638 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,819 psi | 75% | 2664 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,598 psi | 67% | 2569 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,003 psi | 66% | 2536 fps | 96.5% |
| IMR 4350 | <<locked>> | 84% | 39,218 psi | 61% | 2526 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,292 psi | 63% | 2530 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 30,037 psi | 47% | 2352 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 47,805 psi | 75% | 2710 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,692 psi | 83% | 2776 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 53,113 psi | 83% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,155 psi | 80% | 2713 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,473 psi | 79% | 2667 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,919 psi | 72% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,840 psi | 59% | 2480 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 38,392 psi | 60% | 2513 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 36,042 psi | 56% | 2500 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 50,140 psi | 79% | 2687 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,691 psi | 79% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,977 psi | 72% | 2667 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,353 psi | 70% | 2667 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 39,537 psi | 62% | 2667 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 34,432 psi | 54% | 2474 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,195 psi | 72% | 2690 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 47,979 psi | 75% | 2802 fps | 95% |
| Ramshot Hunter | <<locked>> | 82% | 35,636 psi | 56% | 2513 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 41,379 psi | 65% | 2654 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 53,229 psi | 83% | 2759 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,069 psi | 83% | 2772 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 43% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,367 psi | 70% | 2615 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,111 psi | 79% | 2795 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,567 psi | 64% | 2667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,953 psi | 53% | 2490 fps | 96.5% |
| ReloadSwiss RS 70 | 57.6 gr | 80% | 33,489 psi | 52% | 2493 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 54,056 psi | 85% | 2710 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,674 psi | 75% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,292 psi | 65% | 2575 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,327 psi | 76% | 2710 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 44,904 psi | 70% | 2703 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 82% | 41,423 psi | 65% | 2549 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,840 psi | 59% | 2480 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,155 psi | 80% | 2713 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,919 psi | 72% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,392 psi | 60% | 2513 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,206 psi | 66% | 2625 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,982 psi | 81% | 2740 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,603 psi | 78% | 2710 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,995 psi | 80% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,902 psi | 67% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,057 psi | 58% | 2425 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,483 psi | 70% | 2697 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 50,792 psi | 80% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,721 psi | 81% | 2730 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,785 psi | 65% | 2575 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 53,171 psi | 83% | 2756 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 30,835 psi | 48% | 2428 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 40,118 psi | 63% | 2582 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 37,072 psi | 58% | 2526 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 80% | 48,356 psi | 76% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,703 psi | 75% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,384 psi | 74% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,766 psi | 56% | 2428 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 37,260 psi | 58% | 2507 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 98% | 43,308 psi | 68% | 2631 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 46,920 psi | 74% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,695 psi | 59% | 2543 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 28,601 psi | 45% | 2372 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,128 psi | 55% | 2451 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 39,595 psi | 62% | 2592 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,411 psi | 41% | 2375 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,511 psi | 68% | 2641 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 104 powders for .300 WSM loaded with the .308 | 180gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,959 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,959 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 1:15.0 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-16, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 180gr | Sako Hammerhead 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.