Load Specifications
Bullet Manufacturer:Hornady
Bullet Weight:170 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:1:6.0
Load data in caliber .300 WSM with .308 | 170gr | Hornady InterLock FP 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 2495 | <<locked>> | 84% | 54,099 psi | 85% | 2785 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,854 psi | 88% | 2848 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2818 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 57,740 psi | 90% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,505 psi | 85% | 2933 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 52,895 psi | 83% | 3009 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 84% | 57,290 psi | 90% | 2917 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,955 psi | 86% | 2871 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,738 psi | 87% | 2969 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,970 psi | 88% | 2861 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,522 psi | 90% | 2828 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 57,653 psi | 90% | 3048 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,680 psi | 87% | 2966 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,463 psi | 87% | 2894 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,767 psi | 87% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,419 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,840 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 2956 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,515 psi | 76% | 2894 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,672 psi | 72% | 2841 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,958 psi | 63% | 2743 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3025 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,188 psi | 90% | 2933 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,086 psi | 88% | 2907 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,515 psi | 76% | 2894 fps | 96.2% |
| Bofors RP7 | <<locked>> | 92% | 55,854 psi | 88% | 2887 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,232 psi | 90% | 2841 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,738 psi | 87% | 2890 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,811 psi | 89% | 2923 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 56,956 psi | 89% | 2986 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 56,985 psi | 89% | 2943 fps | 98% |
| Hodgdon H4895 | <<locked>> | 82% | 54,375 psi | 85% | 2874 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,579 psi | 87% | 2913 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,273 psi | 85% | 2910 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,406 psi | 90% | 3025 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 57% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,419 psi | 87% | 2877 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,839 psi | 86% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,317 psi | 85% | 2851 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,145 psi | 90% | 2884 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 56,492 psi | 89% | 2917 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,551 psi | 90% | 2917 fps | 98.9% |
| IMR 4831 | <<locked>> | 96% | 55,071 psi | 86% | 2927 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 57,232 psi | 90% | 2943 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,970 psi | 88% | 2861 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,696 psi | 90% | 2890 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,231 psi | 88% | 2841 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,346 psi | 85% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,261 psi | 90% | 2910 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 54,955 psi | 86% | 2897 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,248 psi | 63% | 2664 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 55,898 psi | 88% | 2858 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,507 psi | 89% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,056 psi | 86% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,232 psi | 90% | 2969 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2976 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 56,985 psi | 89% | 2972 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,767 psi | 87% | 2927 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 55,767 psi | 87% | 2972 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 55,970 psi | 88% | 2884 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,086 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,739 psi | 89% | 2907 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,637 psi | 89% | 2982 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,347 psi | 88% | 3015 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,447 psi | 85% | 2959 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,058 psi | 89% | 3045 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 56,695 psi | 89% | 2835 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,478 psi | 89% | 2858 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,202 psi | 88% | 2904 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 2940 fps | 96.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,012 psi | 85% | 2940 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 55,854 psi | 88% | 2887 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,261 psi | 90% | 2910 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,696 psi | 90% | 2890 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,346 psi | 85% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,955 psi | 86% | 2897 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,288 psi | 85% | 2910 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,737 psi | 86% | 2864 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,680 psi | 87% | 2887 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,956 psi | 89% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,493 psi | 90% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,435 psi | 90% | 2864 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,505 psi | 84% | 2936 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 56,521 psi | 89% | 2789 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,404 psi | 85% | 2851 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,188 psi | 88% | 2900 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 55,579 psi | 87% | 2972 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 2920 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 57,377 psi | 90% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,652 psi | 89% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,130 psi | 90% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,493 psi | 90% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,608 psi | 87% | 2913 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,123 psi | 74% | 2779 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 82% | 56,405 psi | 88% | 2861 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,390 psi | 87% | 2831 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,882 psi | 86% | 2923 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 2917 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,477 psi | 87% | 2884 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,782 psi | 89% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,232 psi | 90% | 2989 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,147 psi | 64% | 2877 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,579 psi | 87% | 2894 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 2854 fps | 96.5% |
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% | 47,558 psi | 75% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,774 psi | 72% | 2677 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 36,854 psi | 58% | 2589 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 45,005 psi | 71% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,707 psi | 53% | 2533 fps | 96.3% |
| Accurate High Country | <<locked>> | 98% | 49,385 psi | 77% | 2946 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 50,488 psi | 79% | 2812 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,975 psi | 67% | 2661 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 46,006 psi | 72% | 2795 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,533 psi | 82% | 2812 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,041 psi | 85% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,586 psi | 73% | 2864 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 45,847 psi | 72% | 2792 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,076 psi | 68% | 2687 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,079 psi | 72% | 2753 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,330 psi | 52% | 2539 fps | 96.3% |
| Alliant Reloder-17 | 58.4 gr | 80% | 37,478 psi | 59% | 2671 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,252 psi | 71% | 2782 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,411 psi | 71% | 2835 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,572 psi | 43% | 2402 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,375 psi | 55% | 2628 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,895 psi | 53% | 2638 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,995 psi | 78% | 2822 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,091 psi | 68% | 2694 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 45,411 psi | 71% | 2835 fps | 95.3% |
| Bofors RP7 | <<locked>> | 84% | 43,439 psi | 68% | 2667 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,838 psi | 84% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,127 psi | 82% | 2838 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,656 psi | 68% | 2700 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 40,944 psi | 64% | 2697 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 84% | 44,237 psi | 69% | 2720 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 51,024 psi | 80% | 2822 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,937 psi | 48% | 2444 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,456 psi | 74% | 2802 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 43,163 psi | 68% | 2772 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,977 psi | 42% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,747 psi | 76% | 2769 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,285 psi | 80% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,165 psi | 71% | 2697 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,326 psi | 74% | 2720 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 41,176 psi | 65% | 2644 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,668 psi | 62% | 2589 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 32,561 psi | 51% | 2487 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 47,239 psi | 74% | 2782 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 52,533 psi | 82% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,401 psi | 79% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,850 psi | 78% | 2740 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,252 psi | 71% | 2697 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,289 psi | 58% | 2543 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 40,161 psi | 63% | 2625 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 35,447 psi | 56% | 2556 fps | 95% |
| Norma 201 | <<locked>> | 80% | 49,414 psi | 77% | 2759 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,922 psi | 78% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,426 psi | 71% | 2740 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 46,717 psi | 73% | 2792 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 41,771 psi | 65% | 2792 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 33,779 psi | 53% | 2530 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 45,339 psi | 71% | 2756 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 37,521 psi | 59% | 2628 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 52,402 psi | 82% | 2828 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,431 psi | 82% | 2848 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 43% | 1634 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,743 psi | 69% | 2680 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,298 psi | 77% | 2867 fps | 99.8% |
| ReloadSwiss RS 60 | 58.4 gr | 80% | 39,842 psi | 62% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,417 psi | 52% | 2546 fps | 95.7% |
| ReloadSwiss RS 70 | 60.8 gr | 82% | 35,215 psi | 55% | 2608 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 53,476 psi | 84% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,065 psi | 74% | 2710 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,582 psi | 64% | 2638 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 50,792 psi | 80% | 2828 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 44,106 psi | 69% | 2766 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 43,439 psi | 68% | 2667 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,289 psi | 58% | 2543 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,401 psi | 79% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,252 psi | 71% | 2697 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,161 psi | 63% | 2625 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,553 psi | 65% | 2687 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,126 psi | 80% | 2805 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,936 psi | 77% | 2782 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,459 psi | 79% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,424 psi | 66% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,885 psi | 61% | 2536 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 46,775 psi | 73% | 2822 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 50,125 psi | 79% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,850 psi | 80% | 2799 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,118 psi | 64% | 2641 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,385 psi | 48% | 2487 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 42,003 psi | 66% | 2694 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 50,937 psi | 80% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,050 psi | 74% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,369 psi | 74% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,189 psi | 61% | 2572 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,157 psi | 55% | 2533 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 44,106 psi | 69% | 2723 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 52,881 psi | 83% | 2808 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,687 psi | 72% | 2684 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,664 psi | 54% | 2533 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 29,965 psi | 47% | 2477 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,548 psi | 54% | 2507 fps | 98.5% |
| Winchester 748 | <<locked>> | 80% | 53,258 psi | 83% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 41,118 psi | 64% | 2700 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,760 psi | 44% | 2487 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,747 psi | 76% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 47,921 psi | 75% | 2795 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 | 170gr | Hornady InterLock FP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,048 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 57–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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 | 170gr | Hornady InterLock FP 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.