Load Specifications
Bullet:.308 | 180gr | Barnes X S
Bullet Manufacturer:Barnes
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:1:12.0
Load data in caliber .300 WSM with .308 | 180gr | Barnes X S bullet and 102 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% | 57,101 psi | 89% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,810 psi | 86% | 2703 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2736 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 57,174 psi | 90% | 2749 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,449 psi | 88% | 2841 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,172 psi | 86% | 2766 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,970 psi | 88% | 2766 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2864 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,174 psi | 90% | 2759 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,679 psi | 86% | 2884 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,710 psi | 89% | 2864 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,724 psi | 89% | 2789 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,232 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,333 psi | 88% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,682 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2858 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2802 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,181 psi | 74% | 2756 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,611 psi | 65% | 2671 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,330 psi | 84% | 2933 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,665 psi | 86% | 2779 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,636 psi | 86% | 2766 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2802 fps | 96.5% |
| Bofors RP7 | <<locked>> | 92% | 57,043 psi | 89% | 2785 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,203 psi | 90% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,897 psi | 86% | 2776 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 56,028 psi | 88% | 2851 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 94% | 56,333 psi | 88% | 2815 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 55,825 psi | 87% | 2772 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,652 psi | 89% | 2812 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,767 psi | 87% | 2812 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,360 psi | 85% | 2861 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 57% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,695 psi | 87% | 2759 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,114 psi | 86% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,940 psi | 86% | 2740 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 57,217 psi | 90% | 2762 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 57,464 psi | 90% | 2815 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,042 psi | 86% | 2759 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,985 psi | 89% | 2835 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,230 psi | 87% | 2792 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,304 psi | 88% | 2795 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 57,174 psi | 90% | 2759 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,796 psi | 87% | 2743 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,246 psi | 90% | 2733 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,202 psi | 88% | 2749 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,390 psi | 87% | 2762 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 56,405 psi | 88% | 2799 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,670 psi | 67% | 2598 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 57,725 psi | 90% | 2759 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,621 psi | 86% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,507 psi | 89% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,549 psi | 85% | 2812 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2881 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 54,549 psi | 85% | 2818 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 56,942 psi | 89% | 2825 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,593 psi | 87% | 2894 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 56,739 psi | 89% | 2871 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,747 psi | 76% | 2756 fps | 96.7% |
| Ramshot TAC | <<locked>> | 82% | 57,188 psi | 90% | 2782 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,261 psi | 90% | 2799 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 58% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,636 psi | 86% | 2756 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,259 psi | 85% | 2825 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,435 psi | 90% | 2913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,651 psi | 87% | 2858 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,114 psi | 85% | 2881 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 55,245 psi | 87% | 2717 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,476 psi | 85% | 2756 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,114 psi | 86% | 2785 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2844 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 57,043 psi | 89% | 2785 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,390 psi | 87% | 2762 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,796 psi | 87% | 2743 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,202 psi | 88% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,405 psi | 88% | 2799 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,390 psi | 87% | 2812 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,347 psi | 88% | 2766 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,753 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,911 psi | 86% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,521 psi | 87% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,143 psi | 86% | 2713 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2838 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 54,998 psi | 86% | 2648 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,767 psi | 87% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,462 psi | 85% | 2753 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,826 psi | 89% | 2874 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 2822 fps | 98.4% |
| Unknown powder | <<locked>> | 92% | 55,347 psi | 87% | 2825 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 84% | 54,853 psi | 86% | 2625 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,172 psi | 86% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,667 psi | 90% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,695 psi | 87% | 2733 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,782 psi | 87% | 2795 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2664 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 86% | 57,508 psi | 90% | 2756 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,391 psi | 88% | 2844 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2831 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,434 psi | 88% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,028 psi | 88% | 2851 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,641 psi | 67% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,244 psi | 85% | 2785 fps | 97.1% |
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% | 50,662 psi | 79% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,004 psi | 67% | 2500 fps | 95.4% |
| Accurate 3100 | <<locked>> | 90% | 36,869 psi | 58% | 2480 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,906 psi | 75% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,158 psi | 57% | 2480 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,996 psi | 81% | 2713 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,309 psi | 69% | 2572 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 47,210 psi | 74% | 2703 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,809 psi | 84% | 2710 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,008 psi | 75% | 2772 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,166 psi | 74% | 2707 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,875 psi | 70% | 2605 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,732 psi | 75% | 2664 fps | 99.7% |
| Alliant Reloder-16 | 50 gr | 80% | 35,128 psi | 55% | 2480 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,131 psi | 61% | 2595 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,630 psi | 73% | 2700 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,077 psi | 69% | 2697 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,065 psi | 44% | 2310 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,041 psi | 55% | 2510 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 86% | 33,591 psi | 53% | 2523 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,242 psi | 80% | 2726 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,411 psi | 71% | 2618 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,077 psi | 69% | 2697 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 42,583 psi | 67% | 2536 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,867 psi | 84% | 2746 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,469 psi | 71% | 2618 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,538 psi | 64% | 2579 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 44,614 psi | 70% | 2612 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 52,518 psi | 82% | 2723 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,779 psi | 51% | 2382 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,108 psi | 72% | 2661 fps | 100% |
| Hodgdon Superformance | 59.7 gr | 84% | 41,597 psi | 65% | 2628 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 43% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,557 psi | 73% | 2615 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,907 psi | 77% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,772 psi | 69% | 2556 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,946 psi | 67% | 2516 fps | 96.3% |
| IMR 4350 | <<locked>> | 86% | 42,757 psi | 67% | 2562 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,176 psi | 65% | 2510 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 31,734 psi | 50% | 2359 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 48,863 psi | 77% | 2690 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,026 psi | 83% | 2743 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 53,809 psi | 84% | 2710 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,446 psi | 82% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,053 psi | 80% | 2641 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,108 psi | 74% | 2612 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,291 psi | 62% | 2474 fps | 96.7% |
| Lovex S070 | <<locked>> | 80% | 37,637 psi | 59% | 2454 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 35,665 psi | 56% | 2457 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 51,416 psi | 81% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,634 psi | 81% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,123 psi | 74% | 2654 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 47,892 psi | 75% | 2700 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 40,698 psi | 64% | 2657 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,781 psi | 56% | 2470 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 46,949 psi | 74% | 2671 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 52,040 psi | 82% | 2835 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 82% | 36,796 psi | 58% | 2503 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 45,455 psi | 71% | 2697 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 53,708 psi | 84% | 2730 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,679 psi | 84% | 2749 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 44% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,469 psi | 71% | 2598 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,894 psi | 80% | 2776 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,394 psi | 65% | 2651 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,447 psi | 56% | 2490 fps | 96.7% |
| ReloadSwiss RS 70 | 54.7 gr | 80% | 34,722 psi | 54% | 2487 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 49,182 psi | 77% | 2625 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,888 psi | 67% | 2569 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 96% | 51,851 psi | 81% | 2733 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 45,600 psi | 71% | 2680 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 42,583 psi | 67% | 2536 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,291 psi | 62% | 2474 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,446 psi | 82% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,108 psi | 74% | 2612 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,637 psi | 59% | 2454 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,134 psi | 68% | 2608 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,011 psi | 83% | 2717 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,343 psi | 79% | 2687 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,822 psi | 81% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,830 psi | 69% | 2477 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,406 psi | 60% | 2415 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,165 psi | 71% | 2677 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 51,822 psi | 81% | 2602 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,228 psi | 82% | 2703 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,149 psi | 68% | 2566 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 32,358 psi | 51% | 2431 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 41,379 psi | 65% | 2569 fps | 95.2% |
| Unknown powder | <<locked>> | 80% | 38,232 psi | 60% | 2516 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 80% | 49,197 psi | 77% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,834 psi | 77% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,312 psi | 76% | 2592 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,159 psi | 58% | 2421 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 38,421 psi | 60% | 2493 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 98% | 44,121 psi | 69% | 2612 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 48,037 psi | 75% | 2618 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,957 psi | 61% | 2536 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,718 psi | 45% | 2336 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,187 psi | 57% | 2438 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 40,538 psi | 64% | 2579 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,513 psi | 42% | 2336 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,427 psi | 74% | 2674 fps | 95.6% |
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 102 powders for .300 WSM loaded with the .308 | 180gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,933 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,933 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 1:12.0 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 | Barnes X S 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.