Load Specifications
Bullet:.308 | 180gr | Speer Hot-Cor
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:1:14.5
Load data in caliber .300 WSM with .308 | 180gr | Speer Hot-Cor 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, 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% | 54,621 psi | 86% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,537 psi | 90% | 2779 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,110 psi | 77% | 2746 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 54,853 psi | 86% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,274 psi | 87% | 2858 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 54,273 psi | 85% | 2785 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,361 psi | 87% | 2789 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 2897 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,463 psi | 88% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,172 psi | 85% | 2907 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,985 psi | 88% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,289 psi | 88% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,883 psi | 88% | 2910 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,537 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 2881 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 2825 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,325 psi | 73% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,538 psi | 64% | 2684 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2956 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,070 psi | 85% | 2802 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,782 psi | 89% | 2828 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 2825 fps | 96.8% |
| Bofors RP7 | <<locked>> | 92% | 56,275 psi | 88% | 2812 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,318 psi | 88% | 2812 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,261 psi | 90% | 2844 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,405 psi | 87% | 2877 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 55,796 psi | 87% | 2841 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 82% | 54,839 psi | 86% | 2795 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,144 psi | 88% | 2835 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,172 psi | 86% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,114 psi | 85% | 2890 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 57% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,984 psi | 86% | 2782 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,450 psi | 90% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,508 psi | 90% | 2812 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,536 psi | 89% | 2789 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 57,000 psi | 89% | 2841 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,650 psi | 86% | 2785 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 2861 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,317 psi | 85% | 2812 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,130 psi | 88% | 2825 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 82% | 56,463 psi | 88% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,476 psi | 85% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,637 psi | 89% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,911 psi | 86% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,462 psi | 85% | 2782 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 55,550 psi | 87% | 2822 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,915 psi | 64% | 2602 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 56,434 psi | 88% | 2779 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,072 psi | 89% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,579 psi | 87% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,740 psi | 90% | 2894 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 52,011 psi | 82% | 2910 fps | 98.7% |
| Norma URP | <<locked>> | 96% | 57,508 psi | 90% | 2894 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,362 psi | 88% | 2848 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2927 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 96% | 56,246 psi | 88% | 2897 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,906 psi | 75% | 2779 fps | 97.1% |
| Ramshot TAC | <<locked>> | 82% | 56,536 psi | 89% | 2808 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,666 psi | 89% | 2825 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,709 psi | 58% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,276 psi | 90% | 2828 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,246 psi | 90% | 2904 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,145 psi | 90% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,955 psi | 86% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,464 psi | 90% | 2963 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,174 psi | 90% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,014 psi | 89% | 2779 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,666 psi | 89% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,534 psi | 85% | 2812 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 2867 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 92% | 56,275 psi | 88% | 2812 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,462 psi | 85% | 2782 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,476 psi | 85% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,911 psi | 86% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,550 psi | 87% | 2822 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,795 psi | 86% | 2831 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,347 psi | 87% | 2789 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,202 psi | 88% | 2808 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,551 psi | 90% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,708 psi | 86% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,346 psi | 85% | 2736 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2861 fps | 97.8% |
| Somchem S335 | <<locked>> | 84% | 57,029 psi | 89% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,027 psi | 86% | 2776 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,826 psi | 89% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,594 psi | 89% | 2808 fps | 96% |
| Somchem S365 | <<locked>> | 98% | 56,405 psi | 88% | 2894 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 2848 fps | 98.6% |
| Unknown powder | <<locked>> | 92% | 54,708 psi | 86% | 2848 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 57,421 psi | 90% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,406 psi | 90% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,956 psi | 89% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,781 psi | 86% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,274 psi | 87% | 2818 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,035 psi | 72% | 2680 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 86% | 56,536 psi | 89% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,680 psi | 87% | 2867 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2844 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,072 psi | 88% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,405 psi | 87% | 2877 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,568 psi | 65% | 2812 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,882 psi | 84% | 2815 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% | 48,095 psi | 75% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,611 psi | 65% | 2513 fps | 95.5% |
| Accurate 3100 | <<locked>> | 90% | 34,983 psi | 55% | 2477 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,513 psi | 71% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,214 psi | 54% | 2474 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 51,053 psi | 80% | 2736 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,366 psi | 68% | 2589 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 46,383 psi | 73% | 2726 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,156 psi | 83% | 2733 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,268 psi | 74% | 2792 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,584 psi | 68% | 2615 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,644 psi | 73% | 2680 fps | 99.8% |
| Alliant Reloder-16 | 52.5 gr | 80% | 33,881 psi | 53% | 2484 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,000 psi | 60% | 2605 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,861 psi | 72% | 2720 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 42,902 psi | 67% | 2707 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,223 psi | 41% | 2290 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,533 psi | 53% | 2510 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,894 psi | 50% | 2513 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,676 psi | 79% | 2749 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 43,526 psi | 68% | 2621 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 42,902 psi | 67% | 2707 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 41,292 psi | 65% | 2546 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,765 psi | 83% | 2762 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,048 psi | 69% | 2628 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,421 psi | 62% | 2589 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 43,569 psi | 68% | 2628 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,634 psi | 81% | 2746 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,314 psi | 49% | 2382 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,150 psi | 71% | 2677 fps | 100% |
| Hodgdon Superformance | 62.7 gr | 84% | 40,596 psi | 64% | 2641 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 42% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,730 psi | 72% | 2635 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,572 psi | 75% | 2661 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,612 psi | 67% | 2569 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,032 psi | 66% | 2536 fps | 96.4% |
| IMR 4350 | <<locked>> | 86% | 41,742 psi | 65% | 2579 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,103 psi | 63% | 2523 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 30,023 psi | 47% | 2352 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 47,848 psi | 75% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,591 psi | 82% | 2769 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 53,156 psi | 83% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,995 psi | 80% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,256 psi | 79% | 2664 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,716 psi | 72% | 2621 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,681 psi | 59% | 2477 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 38,218 psi | 60% | 2507 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 35,897 psi | 56% | 2497 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,922 psi | 78% | 2680 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,459 psi | 79% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,021 psi | 72% | 2667 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,208 psi | 69% | 2664 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 39,421 psi | 62% | 2664 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 34,272 psi | 54% | 2470 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 46,006 psi | 72% | 2687 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 51,416 psi | 81% | 2861 fps | 96% |
| Ramshot Hunter | <<locked>> | 82% | 35,476 psi | 56% | 2507 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 96% | 41,263 psi | 65% | 2651 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 53,055 psi | 83% | 2756 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,881 psi | 83% | 2769 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 43% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,222 psi | 69% | 2612 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,922 psi | 78% | 2792 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,393 psi | 63% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,779 psi | 53% | 2484 fps | 96.4% |
| ReloadSwiss RS 70 | 57.4 gr | 80% | 33,344 psi | 52% | 2487 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 54,099 psi | 85% | 2710 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,471 psi | 74% | 2635 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,118 psi | 64% | 2569 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 48,182 psi | 76% | 2707 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 44,701 psi | 70% | 2700 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 82% | 41,292 psi | 65% | 2546 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,681 psi | 59% | 2477 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,995 psi | 80% | 2710 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,716 psi | 72% | 2621 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,218 psi | 60% | 2507 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,018 psi | 66% | 2621 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,793 psi | 81% | 2733 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,400 psi | 77% | 2707 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,792 psi | 80% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,743 psi | 67% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,305 psi | 62% | 2474 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,280 psi | 69% | 2694 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 50,575 psi | 79% | 2618 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,532 psi | 81% | 2723 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,597 psi | 65% | 2572 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 52,765 psi | 83% | 2749 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 30,821 psi | 48% | 2428 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 39,798 psi | 62% | 2572 fps | 95.1% |
| Unknown powder | <<locked>> | 80% | 37,072 psi | 58% | 2526 fps | 97% |
| Vihtavuori N133 | <<locked>> | 80% | 48,138 psi | 75% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,471 psi | 74% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,166 psi | 74% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,578 psi | 56% | 2425 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 37,130 psi | 58% | 2500 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 98% | 43,192 psi | 68% | 2628 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,717 psi | 73% | 2628 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,565 psi | 59% | 2539 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 28,471 psi | 45% | 2365 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,041 psi | 55% | 2448 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 39,421 psi | 62% | 2589 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,310 psi | 41% | 2369 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,514 psi | 73% | 2694 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 114 powders for .300 WSM loaded with the .308 | 180gr | Speer Hot-Cor. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,963 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 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 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, 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 Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H4831 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.