Load Specifications
Bullet Manufacturer:Viper Bullets
Bullet Weight:171 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:1:15.0
Load data in caliber .300 WSM with .308 | 171gr | Viper Bullets Bush Gold bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Winchester 760.
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% | 57,159 psi | 90% | 2776 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,492 psi | 89% | 2805 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,984 psi | 86% | 2815 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,268 psi | 74% | 2782 fps | 98.2% |
| Accurate 4064 | <<locked>> | 88% | 56,797 psi | 89% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,116 psi | 90% | 2956 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 56,173 psi | 88% | 2884 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,261 psi | 90% | 2887 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 2936 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,071 psi | 86% | 2835 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,637 psi | 89% | 2805 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,362 psi | 88% | 3015 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2930 fps | 97.2% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2930 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,360 psi | 85% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,694 psi | 86% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,696 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,680 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 2923 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,744 psi | 70% | 2808 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,276 psi | 62% | 2713 fps | 96.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,560 psi | 79% | 2989 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,202 psi | 88% | 2907 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 55,013 psi | 86% | 2877 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,679 psi | 86% | 2851 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,376 psi | 88% | 2812 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,723 psi | 86% | 2864 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,767 psi | 87% | 2894 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 55,796 psi | 87% | 2953 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 92% | 56,159 psi | 88% | 2913 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 56,768 psi | 89% | 2894 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,375 psi | 85% | 2884 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,797 psi | 89% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,246 psi | 88% | 2992 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 56% | 1768 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,578 psi | 86% | 2848 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,290 psi | 90% | 2874 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,811 psi | 89% | 2871 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,420 psi | 88% | 2858 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 55,477 psi | 87% | 2884 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,405 psi | 88% | 2881 fps | 98.7% |
| IMR 4831 | <<locked>> | 98% | 57,348 psi | 90% | 2946 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 56,130 psi | 88% | 2913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,071 psi | 86% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,565 psi | 89% | 2861 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,376 psi | 87% | 2812 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,797 psi | 89% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,333 psi | 88% | 2881 fps | 99.5% |
| Lovex S070 | <<locked>> | 96% | 57,406 psi | 90% | 2917 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,233 psi | 61% | 2631 fps | 96.2% |
| Norma 201 | <<locked>> | 84% | 54,984 psi | 86% | 2831 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,593 psi | 87% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,566 psi | 90% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,956 psi | 88% | 2933 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 50,067 psi | 78% | 2943 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 55,796 psi | 87% | 2940 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,520 psi | 85% | 2894 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,433 psi | 85% | 2936 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 55,288 psi | 87% | 2861 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,085 psi | 86% | 2874 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,883 psi | 88% | 2877 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,448 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,100 psi | 86% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,782 psi | 89% | 2976 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,840 psi | 88% | 3009 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,927 psi | 88% | 2808 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,593 psi | 87% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,129 psi | 86% | 2874 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,608 psi | 89% | 2907 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2907 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 54,679 psi | 86% | 2851 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,333 psi | 88% | 2881 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,565 psi | 89% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,797 psi | 89% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,406 psi | 90% | 2917 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,637 psi | 89% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,653 psi | 90% | 2894 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,665 psi | 86% | 2858 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,999 psi | 88% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,710 psi | 89% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,376 psi | 88% | 2831 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2900 fps | 96.9% |
| Somchem S335 | <<locked>> | 84% | 55,651 psi | 87% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,276 psi | 90% | 2877 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,143 psi | 86% | 2867 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,389 psi | 85% | 2943 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 2887 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 84% | 56,405 psi | 88% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,593 psi | 87% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,289 psi | 88% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,536 psi | 89% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,694 psi | 86% | 2884 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,035 psi | 72% | 2743 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 55,521 psi | 87% | 2831 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,404 psi | 85% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,145 psi | 90% | 2940 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,748 psi | 78% | 2887 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,331 psi | 85% | 2854 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,898 psi | 88% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,072 psi | 88% | 2956 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,219 psi | 63% | 2844 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,839 psi | 86% | 2867 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,212 psi | 79% | 2822 fps | 96.2% |
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% | 53,766 psi | 84% | 2730 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,528 psi | 73% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,078 psi | 71% | 2648 fps | 95.8% |
| Accurate 3100 | <<locked>> | 92% | 36,027 psi | 56% | 2559 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 44,048 psi | 69% | 2664 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,880 psi | 52% | 2500 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 49,559 psi | 78% | 2782 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,134 psi | 66% | 2631 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 48,196 psi | 76% | 2822 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,634 psi | 81% | 2782 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,113 psi | 83% | 2759 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,803 psi | 72% | 2835 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 47,921 psi | 75% | 2818 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 47,921 psi | 75% | 2818 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,177 psi | 66% | 2654 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,179 psi | 71% | 2720 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,793 psi | 51% | 2513 fps | 96% |
| Alliant Reloder-17 | 57.1 gr | 80% | 36,782 psi | 58% | 2641 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,311 psi | 74% | 2808 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,718 psi | 45% | 2425 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,796 psi | 58% | 2651 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,083 psi | 52% | 2602 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,240 psi | 77% | 2795 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 42,221 psi | 66% | 2664 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 42,699 psi | 67% | 2638 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,142 psi | 83% | 2766 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,271 psi | 80% | 2812 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,815 psi | 67% | 2671 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 40,016 psi | 63% | 2664 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 86% | 46,238 psi | 72% | 2743 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 50,111 psi | 79% | 2792 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,356 psi | 48% | 2415 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,601 psi | 73% | 2772 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 42,293 psi | 66% | 2736 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 42% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,906 psi | 75% | 2740 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,401 psi | 79% | 2776 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,266 psi | 69% | 2664 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,760 psi | 73% | 2690 fps | 97.1% |
| IMR 4350 | <<locked>> | 88% | 43,047 psi | 67% | 2667 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,568 psi | 65% | 2615 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 31,937 psi | 50% | 2461 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 46,325 psi | 73% | 2753 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 51,634 psi | 81% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,472 psi | 78% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,965 psi | 77% | 2710 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,324 psi | 69% | 2667 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,521 psi | 57% | 2510 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 39,450 psi | 62% | 2595 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 36,753 psi | 58% | 2575 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 48,472 psi | 76% | 2730 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,979 psi | 77% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,556 psi | 70% | 2710 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 48,907 psi | 77% | 2815 fps | 95.7% |
| Norma MRP | <<locked>> | 94% | 40,727 psi | 64% | 2753 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 33,011 psi | 52% | 2500 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,570 psi | 70% | 2730 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 36,695 psi | 57% | 2598 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 51,735 psi | 81% | 2802 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,663 psi | 81% | 2818 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 43% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,018 psi | 67% | 2651 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,341 psi | 76% | 2835 fps | 99.7% |
| ReloadSwiss RS 60 | 57.1 gr | 80% | 39,102 psi | 61% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,561 psi | 51% | 2513 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 34,505 psi | 54% | 2575 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 52,663 psi | 83% | 2759 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,354 psi | 73% | 2684 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,697 psi | 62% | 2608 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 98% | 52,982 psi | 83% | 2851 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 96% | 46,108 psi | 72% | 2792 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 42,699 psi | 67% | 2638 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,521 psi | 57% | 2510 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,472 psi | 78% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,324 psi | 69% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 39,450 psi | 62% | 2595 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,741 psi | 64% | 2661 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,343 psi | 79% | 2779 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,109 psi | 75% | 2753 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,690 psi | 78% | 2671 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,727 psi | 65% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,872 psi | 64% | 2566 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,730 psi | 72% | 2785 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 49,226 psi | 77% | 2671 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,111 psi | 79% | 2772 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,248 psi | 63% | 2612 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,631 psi | 46% | 2454 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 41,234 psi | 65% | 2664 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 50,154 psi | 79% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,253 psi | 72% | 2654 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,456 psi | 73% | 2664 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,363 psi | 60% | 2543 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,389 psi | 54% | 2503 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 98% | 43,221 psi | 68% | 2690 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,938 psi | 81% | 2779 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,860 psi | 70% | 2657 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,939 psi | 53% | 2503 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 84% | 29,225 psi | 46% | 2448 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,997 psi | 53% | 2480 fps | 98.3% |
| Winchester 748 | <<locked>> | 80% | 52,373 psi | 82% | 2831 fps | 100% |
| Winchester 760 | 58.7 gr | 84% | 40,205 psi | 63% | 2667 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,079 psi | 42% | 2448 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,906 psi | 75% | 2759 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,804 psi | 73% | 2759 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 104 powders for .300 WSM loaded with the .308 | 171gr | Viper Bullets Bush Gold. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,768 fps to 3,015 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 171.0 gr projectile in 0.308" calls for a 1:15.0 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. Alliant Reloder-17, ReloadSwiss RS 60, Winchester 760 rank at the top here: for .300 WSM with the .308 | 171gr | Viper Bullets Bush Gold 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.