Load Specifications
Bullet Manufacturer:Norma
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:1:14.0
Load data in caliber .300 WSM with .308 | 180gr | Norma PlastSpitz 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-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% | 54,433 psi | 85% | 2703 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,537 psi | 90% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,159 psi | 90% | 2772 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,762 psi | 76% | 2740 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 54,665 psi | 86% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,882 psi | 86% | 2851 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 57,479 psi | 90% | 2828 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,998 psi | 86% | 2782 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2887 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,057 psi | 88% | 2772 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,027 psi | 85% | 2904 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,550 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,883 psi | 88% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,506 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,884 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 2877 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,544 psi | 76% | 2815 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,788 psi | 72% | 2762 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,118 psi | 63% | 2671 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2946 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,522 psi | 90% | 2851 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,405 psi | 88% | 2822 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,544 psi | 76% | 2815 fps | 96.7% |
| Bofors RP7 | <<locked>> | 92% | 55,970 psi | 88% | 2802 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,450 psi | 90% | 2753 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,956 psi | 88% | 2805 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,855 psi | 89% | 2838 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,056 psi | 86% | 2867 fps | 99% |
| Hodgdon H4350 | <<locked>> | 94% | 55,463 psi | 87% | 2835 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 82% | 54,418 psi | 85% | 2785 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,738 psi | 87% | 2828 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,737 psi | 86% | 2828 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,638 psi | 90% | 2943 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 56% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,563 psi | 86% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,261 psi | 90% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,406 psi | 90% | 2805 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,188 psi | 88% | 2782 fps | 99% |
| IMR 4350 | <<locked>> | 96% | 56,695 psi | 89% | 2831 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,653 psi | 90% | 2831 fps | 99.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2854 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,319 psi | 90% | 2854 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,579 psi | 87% | 2815 fps | 96% |
| IMR 8208 XBR | <<locked>> | 82% | 56,057 psi | 88% | 2772 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,056 psi | 85% | 2753 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,507 psi | 89% | 2756 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,766 psi | 86% | 2762 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,464 psi | 90% | 2825 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 55,216 psi | 87% | 2815 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,611 psi | 64% | 2595 fps | 97.1% |
| Norma 201 | <<locked>> | 84% | 56,246 psi | 88% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,869 psi | 89% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,129 psi | 86% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,450 psi | 90% | 2887 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 51,430 psi | 81% | 2897 fps | 98.5% |
| Norma URP | <<locked>> | 96% | 57,145 psi | 90% | 2887 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,970 psi | 88% | 2841 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2920 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 55,941 psi | 88% | 2887 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2772 fps | 97% |
| Ramshot TAC | <<locked>> | 82% | 56,188 psi | 88% | 2802 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,275 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,913 psi | 89% | 2822 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,811 psi | 89% | 2894 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,463 psi | 88% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,592 psi | 86% | 2874 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,174 psi | 90% | 2956 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,000 psi | 89% | 2746 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,840 psi | 89% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,231 psi | 88% | 2812 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 2854 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,215 psi | 85% | 2861 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 92% | 55,970 psi | 88% | 2802 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,464 psi | 90% | 2825 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,056 psi | 85% | 2753 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,766 psi | 86% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,216 psi | 87% | 2815 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,447 psi | 85% | 2825 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,926 psi | 86% | 2779 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,796 psi | 87% | 2802 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,101 psi | 89% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,534 psi | 85% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,537 psi | 90% | 2779 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,722 psi | 84% | 2854 fps | 97.7% |
| Somchem S335 | <<locked>> | 84% | 56,840 psi | 89% | 2703 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,621 psi | 86% | 2769 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,405 psi | 88% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,101 psi | 88% | 2799 fps | 95.8% |
| Somchem S365 | <<locked>> | 98% | 55,999 psi | 88% | 2887 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 2835 fps | 98.5% |
| Unknown powder | <<locked>> | 92% | 54,331 psi | 85% | 2838 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 56,956 psi | 89% | 2680 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,927 psi | 89% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,565 psi | 89% | 2740 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,404 psi | 85% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,839 psi | 86% | 2812 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,730 psi | 72% | 2674 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 86% | 56,405 psi | 88% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,317 psi | 87% | 2858 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2838 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,796 psi | 87% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,056 psi | 86% | 2867 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,292 psi | 65% | 2805 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 2861 fps | 98% |
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% | 47,645 psi | 75% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,795 psi | 84% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,278 psi | 65% | 2503 fps | 95.3% |
| Accurate 3100 | <<locked>> | 90% | 34,664 psi | 54% | 2467 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 45,121 psi | 71% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,910 psi | 53% | 2464 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 80% | 50,662 psi | 79% | 2726 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,004 psi | 67% | 2582 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 46,079 psi | 72% | 2717 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,736 psi | 83% | 2726 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,876 psi | 73% | 2782 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,163 psi | 68% | 2605 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,238 psi | 72% | 2671 fps | 99.7% |
| Alliant Reloder-16 | 52.1 gr | 80% | 33,576 psi | 53% | 2474 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,652 psi | 59% | 2595 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,527 psi | 71% | 2710 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,571 psi | 71% | 2759 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,789 psi | 44% | 2339 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,520 psi | 56% | 2559 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,633 psi | 50% | 2507 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,299 psi | 79% | 2740 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 43,323 psi | 68% | 2618 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 45,571 psi | 71% | 2759 fps | 95.9% |
| Bofors RP7 | <<locked>> | 82% | 40,915 psi | 64% | 2536 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,143 psi | 85% | 2707 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,359 psi | 82% | 2753 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,888 psi | 69% | 2625 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,059 psi | 61% | 2579 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 43,410 psi | 68% | 2621 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 51,184 psi | 80% | 2736 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,125 psi | 49% | 2375 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,947 psi | 70% | 2671 fps | 100% |
| Hodgdon Superformance | 62.3 gr | 84% | 40,321 psi | 63% | 2635 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 42% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,556 psi | 71% | 2628 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,326 psi | 74% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,206 psi | 66% | 2559 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,684 psi | 65% | 2526 fps | 96.3% |
| IMR 4350 | <<locked>> | 86% | 41,437 psi | 65% | 2572 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,958 psi | 63% | 2516 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 29,704 psi | 47% | 2339 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 47,398 psi | 74% | 2700 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,257 psi | 82% | 2762 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 52,736 psi | 83% | 2726 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,531 psi | 79% | 2703 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,067 psi | 78% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,513 psi | 71% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,347 psi | 59% | 2467 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 38,072 psi | 60% | 2500 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 35,563 psi | 56% | 2487 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 49,516 psi | 78% | 2674 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,038 psi | 78% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,614 psi | 71% | 2661 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 47,007 psi | 74% | 2717 fps | 95.8% |
| Norma MRP | <<locked>> | 92% | 39,131 psi | 61% | 2657 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 33,924 psi | 53% | 2461 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 45,629 psi | 72% | 2677 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 50,879 psi | 80% | 2848 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 82% | 35,172 psi | 55% | 2497 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 44,077 psi | 69% | 2703 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 52,736 psi | 83% | 2749 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,750 psi | 83% | 2766 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 43% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,063 psi | 69% | 2608 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,690 psi | 78% | 2785 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,045 psi | 63% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,620 psi | 53% | 2480 fps | 96.3% |
| ReloadSwiss RS 70 | 57 gr | 80% | 33,083 psi | 52% | 2477 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 53,621 psi | 84% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,282 psi | 74% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,727 psi | 64% | 2562 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 50,966 psi | 80% | 2749 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 44,382 psi | 70% | 2694 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 40,915 psi | 64% | 2536 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,347 psi | 59% | 2467 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,531 psi | 79% | 2703 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,513 psi | 71% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,072 psi | 60% | 2500 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,887 psi | 66% | 2615 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,401 psi | 81% | 2726 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,255 psi | 77% | 2700 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,589 psi | 79% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,525 psi | 67% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,146 psi | 61% | 2467 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,947 psi | 69% | 2687 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,183 psi | 79% | 2612 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,184 psi | 80% | 2720 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,220 psi | 65% | 2562 fps | 99.6% |
| Somchem S361 | <<locked>> | 96% | 52,533 psi | 82% | 2743 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 30,501 psi | 48% | 2418 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 39,653 psi | 62% | 2569 fps | 95% |
| Unknown powder | <<locked>> | 80% | 36,738 psi | 58% | 2516 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 80% | 47,921 psi | 75% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,253 psi | 74% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,992 psi | 74% | 2605 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,418 psi | 56% | 2418 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 36,753 psi | 58% | 2490 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 98% | 42,699 psi | 67% | 2618 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 46,586 psi | 73% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,391 psi | 59% | 2536 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 28,297 psi | 44% | 2359 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,751 psi | 54% | 2438 fps | 98.9% |
| Winchester 760 | <<locked>> | 80% | 39,059 psi | 61% | 2579 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,078 psi | 41% | 2359 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,209 psi | 72% | 2687 fps | 95.7% |
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 105 powders for .300 WSM loaded with the .308 | 180gr | Norma PlastSpitz. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,956 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 180.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 | Norma PlastSpitz 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.