Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:186 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:1:13.5
Load data in caliber .300 WSM with .308 | 186gr | Peregrine Backup (VRG-2) bullet and 108 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% | 57,740 psi | 90% | 2667 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,101 psi | 89% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,101 psi | 89% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,029 psi | 89% | 2733 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,501 psi | 78% | 2710 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 55,274 psi | 87% | 2717 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,550 psi | 87% | 2815 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 54,665 psi | 86% | 2743 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,608 psi | 87% | 2746 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 2858 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,869 psi | 89% | 2740 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,621 psi | 86% | 2864 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2844 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,289 psi | 88% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,565 psi | 89% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,420 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,998 psi | 85% | 2844 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 2844 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2785 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,615 psi | 73% | 2733 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,640 psi | 64% | 2648 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2917 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,418 psi | 85% | 2762 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,324 psi | 71% | 2713 fps | 96% |
| Bofors RP3 | <<locked>> | 88% | 57,188 psi | 90% | 2789 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2785 fps | 97.2% |
| Bofors RP7 | <<locked>> | 92% | 56,666 psi | 89% | 2772 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,622 psi | 87% | 2762 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,609 psi | 90% | 2805 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,709 psi | 87% | 2835 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 94% | 55,434 psi | 87% | 2795 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 82% | 55,259 psi | 87% | 2753 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,739 psi | 89% | 2795 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,578 psi | 86% | 2785 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,346 psi | 85% | 2851 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 57% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,607 psi | 86% | 2733 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,520 psi | 85% | 2713 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,549 psi | 85% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,782 psi | 89% | 2749 fps | 99.3% |
| IMR 4350 | <<locked>> | 96% | 57,290 psi | 90% | 2802 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,624 psi | 90% | 2792 fps | 99.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,739 psi | 89% | 2818 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,534 psi | 85% | 2769 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2776 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,098 psi | 82% | 2825 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 82% | 56,869 psi | 89% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,723 psi | 86% | 2717 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,043 psi | 89% | 2720 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,332 psi | 87% | 2726 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,781 psi | 86% | 2743 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 55,738 psi | 87% | 2779 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,089 psi | 64% | 2566 fps | 97.6% |
| Norma 201 | <<locked>> | 84% | 56,782 psi | 89% | 2736 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,493 psi | 90% | 2733 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,811 psi | 87% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,549 psi | 85% | 2802 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2871 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 54,288 psi | 85% | 2802 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,521 psi | 89% | 2805 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2890 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 96% | 56,681 psi | 89% | 2854 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,240 psi | 76% | 2746 fps | 97.5% |
| Ramshot TAC | <<locked>> | 82% | 56,811 psi | 89% | 2766 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,956 psi | 89% | 2779 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,840 psi | 58% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,667 psi | 90% | 2789 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,609 psi | 90% | 2858 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,479 psi | 90% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,332 psi | 87% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,143 psi | 85% | 2867 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,406 psi | 90% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,435 psi | 90% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,000 psi | 89% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,129 psi | 86% | 2776 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,998 psi | 86% | 2828 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 92% | 56,666 psi | 89% | 2772 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,781 psi | 86% | 2743 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,723 psi | 86% | 2717 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,332 psi | 87% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,737 psi | 86% | 2769 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,969 psi | 86% | 2789 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,637 psi | 87% | 2746 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,478 psi | 89% | 2766 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,331 psi | 85% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,129 psi | 86% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,476 psi | 85% | 2694 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2815 fps | 97.9% |
| Somchem S335 | <<locked>> | 84% | 57,348 psi | 90% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,361 psi | 87% | 2733 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,116 psi | 90% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,840 psi | 89% | 2769 fps | 96.3% |
| Somchem S365 | <<locked>> | 98% | 56,855 psi | 89% | 2851 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,608 psi | 87% | 2805 fps | 98.8% |
| Unknown powder | <<locked>> | 92% | 55,172 psi | 86% | 2808 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 86% | 57,740 psi | 90% | 2644 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,507 psi | 89% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,188 psi | 90% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,100 psi | 86% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,738 psi | 87% | 2779 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,340 psi | 73% | 2644 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 86% | 56,782 psi | 89% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,927 psi | 88% | 2825 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 2805 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,565 psi | 89% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,709 psi | 87% | 2835 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,916 psi | 66% | 2776 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,114 psi | 85% | 2776 fps | 97.7% |
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% | 54,172 psi | 85% | 2621 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,818 psi | 73% | 2559 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,301 psi | 84% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,799 psi | 64% | 2461 fps | 95.6% |
| Accurate 3100 | <<locked>> | 90% | 35,215 psi | 55% | 2444 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 45,759 psi | 72% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,272 psi | 54% | 2434 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,155 psi | 80% | 2690 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,598 psi | 68% | 2552 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 43,888 psi | 69% | 2635 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,258 psi | 83% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,543 psi | 75% | 2753 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 42,902 psi | 67% | 2625 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,816 psi | 69% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,702 psi | 73% | 2638 fps | 99.8% |
| Alliant Reloder-16 | 51.7 gr | 80% | 34,055 psi | 53% | 2451 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,145 psi | 60% | 2569 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,250 psi | 68% | 2628 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,163 psi | 68% | 2674 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,368 psi | 41% | 2264 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,765 psi | 53% | 2480 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,097 psi | 50% | 2484 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,952 psi | 80% | 2710 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 42,525 psi | 67% | 2657 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 43,787 psi | 69% | 2582 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,163 psi | 68% | 2674 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 38,972 psi | 61% | 2461 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,011 psi | 82% | 2710 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,353 psi | 70% | 2592 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 39,595 psi | 62% | 2552 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 86% | 43,091 psi | 68% | 2582 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 51,692 psi | 81% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,444 psi | 49% | 2349 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,570 psi | 70% | 2628 fps | 100% |
| Hodgdon Superformance | 60.3 gr | 82% | 38,072 psi | 60% | 2546 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 42% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,136 psi | 71% | 2585 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,022 psi | 75% | 2618 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,786 psi | 67% | 2530 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,192 psi | 66% | 2500 fps | 96.8% |
| IMR 4350 | <<locked>> | 84% | 39,392 psi | 62% | 2490 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,552 psi | 62% | 2477 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 30,153 psi | 47% | 2316 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,906 psi | 75% | 2664 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,025 psi | 82% | 2723 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 98% | 48,617 psi | 76% | 2762 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 53,258 psi | 83% | 2690 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,343 psi | 80% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,488 psi | 79% | 2621 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,905 psi | 72% | 2582 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,855 psi | 59% | 2441 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,114 psi | 57% | 2421 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 33,794 psi | 53% | 2411 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,169 psi | 79% | 2641 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,734 psi | 80% | 2641 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,079 psi | 72% | 2625 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,338 psi | 69% | 2628 fps | 95.5% |
| Norma MRP | <<locked>> | 90% | 37,188 psi | 58% | 2575 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,505 psi | 54% | 2438 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 46,209 psi | 72% | 2648 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 48,066 psi | 75% | 2762 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 82% | 35,621 psi | 56% | 2474 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 41,452 psi | 65% | 2618 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 53,316 psi | 84% | 2717 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,359 psi | 84% | 2730 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 43% | 1545 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,570 psi | 70% | 2579 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,372 psi | 79% | 2753 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,567 psi | 64% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,069 psi | 53% | 2454 fps | 96.9% |
| ReloadSwiss RS 70 | 56.5 gr | 80% | 33,460 psi | 52% | 2454 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 54,259 psi | 85% | 2664 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,645 psi | 75% | 2592 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,350 psi | 65% | 2533 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,341 psi | 76% | 2664 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 42,076 psi | 66% | 2608 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 38,972 psi | 61% | 2461 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,855 psi | 59% | 2441 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,343 psi | 80% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,905 psi | 72% | 2582 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,478 psi | 59% | 2457 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,380 psi | 66% | 2582 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,996 psi | 81% | 2694 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,806 psi | 78% | 2667 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,227 psi | 80% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,091 psi | 68% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,086 psi | 58% | 2388 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,540 psi | 68% | 2644 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 50,850 psi | 80% | 2575 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,822 psi | 81% | 2684 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,800 psi | 66% | 2533 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 53,229 psi | 83% | 2713 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 31,009 psi | 49% | 2395 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,089 psi | 63% | 2539 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 37,144 psi | 58% | 2487 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 80% | 48,269 psi | 76% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,920 psi | 74% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,456 psi | 74% | 2566 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,708 psi | 56% | 2385 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 37,188 psi | 58% | 2461 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 96% | 40,770 psi | 64% | 2543 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,036 psi | 74% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,826 psi | 59% | 2507 fps | 98% |
| Vihtavuori N555 | <<locked>> | 82% | 28,660 psi | 45% | 2336 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,172 psi | 55% | 2411 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,595 psi | 62% | 2552 fps | 96.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,411 psi | 41% | 2346 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,613 psi | 68% | 2602 fps | 95.4% |
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 108 powders for .300 WSM loaded with the .308 | 186gr | Peregrine Backup (VRG-2). Alliant Reloder-26 delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,917 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 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 186.0 gr projectile in 0.308" calls for a 1:13.5 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 | 186gr | Peregrine Backup (VRG-2) 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.