Load Specifications
Bullet Manufacturer:Berger
Bullet Weight:185 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:1:11.0
Load data in caliber .300 WSM with .308 | 185gr | Berger Hybrid Target bullet and 105 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-17 and ReloadSwiss RS 60.
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% | 56,826 psi | 89% | 2644 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,188 psi | 88% | 2674 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,970 psi | 88% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,854 psi | 88% | 2697 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,833 psi | 73% | 2661 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 56,507 psi | 89% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,681 psi | 89% | 2825 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 56,130 psi | 88% | 2756 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,072 psi | 89% | 2759 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,375 psi | 85% | 2808 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,882 psi | 86% | 2703 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,362 psi | 88% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,043 psi | 88% | 2881 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,406 psi | 90% | 2776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,389 psi | 85% | 2753 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,305 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,056 psi | 86% | 2854 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2795 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,891 psi | 73% | 2733 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,353 psi | 70% | 2687 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,870 psi | 61% | 2595 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,082 psi | 78% | 2861 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,854 psi | 88% | 2776 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,737 psi | 86% | 2746 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,891 psi | 73% | 2733 fps | 96.2% |
| Bofors RP7 | <<locked>> | 92% | 54,592 psi | 86% | 2726 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,304 psi | 88% | 2684 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,520 psi | 85% | 2736 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,376 psi | 87% | 2762 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 56,942 psi | 89% | 2844 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 96% | 57,435 psi | 90% | 2808 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 84% | 56,782 psi | 89% | 2766 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2802 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,594 psi | 89% | 2802 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,666 psi | 87% | 2861 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 56% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,753 psi | 89% | 2753 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,782 psi | 87% | 2723 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,883 psi | 88% | 2733 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,897 psi | 86% | 2707 fps | 98.8% |
| IMR 4350 | <<locked>> | 96% | 55,129 psi | 86% | 2759 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,086 psi | 88% | 2753 fps | 98.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2772 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,811 psi | 87% | 2779 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,882 psi | 86% | 2703 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,231 psi | 88% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,158 psi | 86% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,695 psi | 89% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,898 psi | 88% | 2749 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 57,000 psi | 89% | 2785 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 2520 fps | 96.7% |
| Norma 201 | <<locked>> | 84% | 54,810 psi | 86% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,419 psi | 87% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,217 psi | 90% | 2789 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,709 psi | 87% | 2808 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 49,603 psi | 78% | 2815 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 55,361 psi | 87% | 2808 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,259 psi | 85% | 2766 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,084 psi | 83% | 2835 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 96% | 54,186 psi | 85% | 2812 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,818 psi | 72% | 2687 fps | 96.4% |
| Ramshot TAC | <<locked>> | 82% | 54,984 psi | 86% | 2730 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,969 psi | 86% | 2746 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,608 psi | 87% | 2749 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,158 psi | 86% | 2818 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,824 psi | 86% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,362 psi | 88% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,390 psi | 87% | 2877 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,796 psi | 87% | 2677 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,506 psi | 87% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,882 psi | 86% | 2743 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 2779 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 2782 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 54,592 psi | 86% | 2726 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,898 psi | 88% | 2749 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,231 psi | 88% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,695 psi | 89% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,000 psi | 89% | 2785 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,202 psi | 88% | 2799 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,493 psi | 90% | 2762 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,447 psi | 85% | 2730 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,072 psi | 88% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,565 psi | 89% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,130 psi | 88% | 2707 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 2776 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 55,477 psi | 87% | 2635 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,855 psi | 89% | 2746 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,795 psi | 86% | 2736 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 2858 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,982 psi | 83% | 2759 fps | 98.2% |
| Unknown powder | <<locked>> | 94% | 56,246 psi | 88% | 2815 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 86% | 55,854 psi | 88% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,579 psi | 87% | 2664 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,245 psi | 87% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,144 psi | 88% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,956 psi | 89% | 2789 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,005 psi | 69% | 2595 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 86% | 54,781 psi | 86% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,087 psi | 89% | 2835 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,342 psi | 77% | 2759 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,653 psi | 90% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,942 psi | 89% | 2844 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,740 psi | 62% | 2723 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,405 psi | 87% | 2782 fps | 97.6% |
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% | 53,519 psi | 84% | 2602 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,398 psi | 73% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,431 psi | 82% | 2680 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,248 psi | 63% | 2434 fps | 95% |
| Accurate 3100 | <<locked>> | 92% | 35,636 psi | 56% | 2448 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 43,932 psi | 69% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,764 psi | 51% | 2395 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 80% | 49,429 psi | 77% | 2657 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,003 psi | 66% | 2513 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 44,802 psi | 70% | 2641 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,503 psi | 81% | 2654 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,939 psi | 83% | 2628 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,469 psi | 71% | 2707 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,148 psi | 66% | 2539 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,020 psi | 71% | 2602 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,721 psi | 51% | 2408 fps | 96.6% |
| Alliant Reloder-17 | 53.4 gr | 80% | 36,564 psi | 57% | 2526 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,063 psi | 69% | 2635 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,903 psi | 69% | 2677 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,919 psi | 42% | 2274 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,418 psi | 54% | 2487 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,735 psi | 51% | 2493 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,950 psi | 77% | 2671 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 42,148 psi | 66% | 2549 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,903 psi | 69% | 2677 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 39,914 psi | 63% | 2470 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,910 psi | 83% | 2635 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,879 psi | 80% | 2684 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,612 psi | 67% | 2552 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 80% | 37,782 psi | 59% | 2503 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 42,119 psi | 66% | 2546 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 49,922 psi | 78% | 2664 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,255 psi | 47% | 2313 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,540 psi | 68% | 2598 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,131 psi | 61% | 2559 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 42% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,469 psi | 70% | 2559 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 46,108 psi | 72% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,336 psi | 65% | 2493 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,901 psi | 64% | 2464 fps | 96% |
| IMR 4350 | <<locked>> | 86% | 40,248 psi | 63% | 2500 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,943 psi | 61% | 2448 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 30,806 psi | 48% | 2329 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,151 psi | 72% | 2628 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 51,503 psi | 81% | 2654 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,313 psi | 77% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,834 psi | 77% | 2585 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,237 psi | 69% | 2546 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,477 psi | 57% | 2405 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 36,912 psi | 58% | 2431 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 34,330 psi | 54% | 2418 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 48,399 psi | 76% | 2605 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,921 psi | 77% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,425 psi | 70% | 2589 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 45,411 psi | 71% | 2635 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 40,422 psi | 63% | 2638 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 33,011 psi | 52% | 2395 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 44,193 psi | 69% | 2605 fps | 99.7% |
| Ramshot Grand | <<locked>> | 98% | 49,182 psi | 77% | 2766 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 84% | 36,506 psi | 57% | 2487 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 42,453 psi | 67% | 2625 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 51,474 psi | 81% | 2674 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,300 psi | 80% | 2690 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 43% | 1532 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,931 psi | 67% | 2536 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,225 psi | 76% | 2710 fps | 99.8% |
| ReloadSwiss RS 60 | 53.4 gr | 80% | 38,870 psi | 61% | 2585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,329 psi | 51% | 2405 fps | 95.9% |
| ReloadSwiss RS 70 | 55.6 gr | 82% | 34,374 psi | 54% | 2467 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 52,620 psi | 82% | 2635 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,180 psi | 72% | 2562 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,668 psi | 62% | 2497 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 49,400 psi | 77% | 2674 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 94% | 42,975 psi | 67% | 2618 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 39,914 psi | 63% | 2470 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,477 psi | 57% | 2405 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,313 psi | 77% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,237 psi | 69% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,912 psi | 58% | 2431 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,625 psi | 64% | 2546 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,009 psi | 78% | 2654 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,964 psi | 75% | 2628 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,356 psi | 77% | 2543 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,452 psi | 65% | 2421 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,058 psi | 60% | 2398 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,569 psi | 67% | 2612 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 49,168 psi | 77% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,821 psi | 78% | 2644 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,176 psi | 63% | 2497 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 29,530 psi | 46% | 2352 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 40,915 psi | 64% | 2549 fps | 95.5% |
| Unknown powder | <<locked>> | 80% | 35,636 psi | 56% | 2448 fps | 96.6% |
| Vihtavuori N133 | <<locked>> | 80% | 46,818 psi | 73% | 2490 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,919 psi | 72% | 2530 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,730 psi | 72% | 2536 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,374 psi | 54% | 2352 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 35,737 psi | 56% | 2425 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 98% | 41,423 psi | 65% | 2546 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 45,440 psi | 71% | 2559 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,172 psi | 57% | 2464 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 84% | 29,109 psi | 46% | 2346 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,779 psi | 53% | 2372 fps | 98.6% |
| Winchester 760 | <<locked>> | 80% | 37,782 psi | 59% | 2503 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,905 psi | 42% | 2349 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,773 psi | 70% | 2612 fps | 95.3% |
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 117 powders for .300 WSM loaded with the .308 | 185gr | Berger Hybrid Target. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 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 185.0 gr projectile in 0.308" calls for a 1:11.0 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-17, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 185gr | Berger Hybrid Target they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.