Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:177 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:1:12.5
Load data in caliber .300 WSM with .308 | 177gr | Sierra Hollow Point Boat Tail - Closed Nose bullet and 104 powders. The key underlying parameters are shown in the table above.
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% | 56,492 psi | 89% | 2710 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,130 psi | 88% | 2743 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,421 psi | 90% | 2805 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,259 psi | 85% | 2749 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,746 psi | 73% | 2720 fps | 98.2% |
| Accurate 4064 | <<locked>> | 88% | 56,043 psi | 88% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,260 psi | 88% | 2887 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 55,840 psi | 88% | 2825 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,884 psi | 89% | 2825 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,070 psi | 85% | 2867 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,694 psi | 86% | 2769 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,985 psi | 88% | 2740 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,883 psi | 88% | 2946 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2867 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,392 psi | 90% | 2848 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,725 psi | 90% | 2871 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,159 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,897 psi | 86% | 2923 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2858 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,947 psi | 69% | 2743 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,667 psi | 61% | 2648 fps | 96.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,879 psi | 78% | 2923 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,709 psi | 87% | 2841 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,418 psi | 85% | 2812 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 57,740 psi | 90% | 2841 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,912 psi | 88% | 2746 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,288 psi | 85% | 2799 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,274 psi | 87% | 2828 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 55,114 psi | 86% | 2884 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 92% | 55,550 psi | 87% | 2848 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 56,434 psi | 88% | 2831 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,232 psi | 90% | 2864 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,246 psi | 88% | 2867 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,463 psi | 87% | 2923 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 56% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,450 psi | 90% | 2831 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,739 psi | 89% | 2808 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,318 psi | 88% | 2805 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,796 psi | 87% | 2789 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 54,766 psi | 86% | 2818 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,985 psi | 88% | 2818 fps | 98.7% |
| IMR 4831 | <<locked>> | 98% | 56,637 psi | 89% | 2877 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,666 psi | 87% | 2848 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,694 psi | 86% | 2769 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,072 psi | 88% | 2799 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,998 psi | 86% | 2749 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,246 psi | 88% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,724 psi | 87% | 2815 fps | 99.5% |
| Lovex S070 | <<locked>> | 96% | 56,913 psi | 89% | 2854 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,725 psi | 61% | 2569 fps | 96.3% |
| Norma 201 | <<locked>> | 84% | 54,607 psi | 86% | 2766 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,172 psi | 86% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,956 psi | 89% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,405 psi | 87% | 2867 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,327 psi | 77% | 2874 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 55,259 psi | 87% | 2874 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,114 psi | 85% | 2831 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,711 psi | 90% | 2930 fps | 99.6% |
| Ramshot TAC | <<locked>> | 82% | 54,737 psi | 86% | 2792 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,476 psi | 85% | 2808 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 57% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,201 psi | 87% | 2808 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,940 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,462 psi | 85% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,217 psi | 88% | 2913 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,187 psi | 86% | 2943 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,506 psi | 87% | 2743 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,245 psi | 87% | 2766 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,520 psi | 85% | 2808 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,811 psi | 87% | 2838 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,156 psi | 82% | 2841 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 94% | 57,740 psi | 90% | 2841 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,724 psi | 87% | 2815 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,072 psi | 88% | 2799 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,246 psi | 88% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,913 psi | 89% | 2854 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,970 psi | 88% | 2864 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,101 psi | 89% | 2828 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,653 psi | 90% | 2841 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,724 psi | 87% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,202 psi | 88% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,869 psi | 88% | 2769 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 2838 fps | 97% |
| Somchem S335 | <<locked>> | 84% | 55,288 psi | 87% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,782 psi | 89% | 2815 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,549 psi | 85% | 2802 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2927 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,866 psi | 83% | 2822 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 84% | 56,115 psi | 88% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,100 psi | 86% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,767 psi | 87% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,057 psi | 88% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,421 psi | 90% | 2867 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2684 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 55,172 psi | 86% | 2769 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,479 psi | 90% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,536 psi | 89% | 2874 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,052 psi | 77% | 2822 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,450 psi | 90% | 2841 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,405 psi | 87% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,405 psi | 87% | 2890 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,508 psi | 62% | 2776 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,259 psi | 85% | 2802 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,603 psi | 78% | 2756 fps | 96.2% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 53,287 psi | 84% | 2667 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,151 psi | 72% | 2602 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,606 psi | 84% | 2756 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,599 psi | 70% | 2585 fps | 95.9% |
| Accurate 3100 | <<locked>> | 92% | 35,476 psi | 56% | 2500 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 43,627 psi | 68% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,590 psi | 51% | 2448 fps | 96% |
| ADI AR 2206H | <<locked>> | 80% | 49,298 psi | 77% | 2720 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,785 psi | 65% | 2572 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 47,558 psi | 75% | 2756 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,401 psi | 81% | 2720 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,359 psi | 82% | 2694 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,324 psi | 71% | 2769 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 47,282 psi | 74% | 2753 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,858 psi | 66% | 2595 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,918 psi | 70% | 2664 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,532 psi | 51% | 2457 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,332 psi | 57% | 2579 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,644 psi | 73% | 2743 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,471 psi | 45% | 2375 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,347 psi | 57% | 2592 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,532 psi | 51% | 2543 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,559 psi | 76% | 2730 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 41,771 psi | 65% | 2605 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 42,395 psi | 66% | 2579 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,866 psi | 83% | 2703 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,749 psi | 80% | 2749 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,409 psi | 66% | 2608 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 39,610 psi | 62% | 2605 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 86% | 45,861 psi | 72% | 2684 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 49,835 psi | 78% | 2730 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,892 psi | 47% | 2359 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,021 psi | 72% | 2710 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,669 psi | 65% | 2674 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 42% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,630 psi | 75% | 2680 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,951 psi | 78% | 2713 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,932 psi | 69% | 2605 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,369 psi | 73% | 2631 fps | 97.1% |
| IMR 4350 | <<locked>> | 88% | 42,699 psi | 67% | 2608 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,191 psi | 65% | 2556 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 31,546 psi | 49% | 2405 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 46,064 psi | 72% | 2690 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 51,401 psi | 81% | 2720 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,066 psi | 77% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,602 psi | 76% | 2648 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,990 psi | 69% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,245 psi | 57% | 2457 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 39,175 psi | 61% | 2539 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 36,405 psi | 57% | 2520 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 48,167 psi | 75% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,660 psi | 76% | 2671 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,295 psi | 69% | 2651 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 48,457 psi | 76% | 2756 fps | 95.8% |
| Norma MRP | <<locked>> | 94% | 40,234 psi | 63% | 2694 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 32,721 psi | 51% | 2444 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 44,106 psi | 69% | 2667 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 36,332 psi | 57% | 2539 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 51,300 psi | 80% | 2740 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,937 psi | 80% | 2753 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 43% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,699 psi | 67% | 2595 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,906 psi | 75% | 2772 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,638 psi | 61% | 2641 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,285 psi | 51% | 2461 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 34,214 psi | 54% | 2520 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 52,170 psi | 82% | 2697 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,919 psi | 72% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,392 psi | 62% | 2552 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 98% | 52,330 psi | 82% | 2785 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 96% | 45,658 psi | 72% | 2730 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 42,395 psi | 66% | 2579 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,245 psi | 57% | 2457 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,066 psi | 77% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,990 psi | 69% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 39,175 psi | 61% | 2539 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,408 psi | 63% | 2602 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,893 psi | 78% | 2717 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,747 psi | 75% | 2690 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,240 psi | 77% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,292 psi | 65% | 2480 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,379 psi | 63% | 2503 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,223 psi | 71% | 2726 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 48,907 psi | 77% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,458 psi | 78% | 2707 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,958 psi | 63% | 2552 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 29,414 psi | 46% | 2402 fps | 98.1% |
| Somchem S385 | <<locked>> | 92% | 40,712 psi | 64% | 2602 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 49,676 psi | 78% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,745 psi | 72% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,151 psi | 72% | 2605 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,101 psi | 60% | 2487 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,156 psi | 54% | 2451 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 42,714 psi | 67% | 2631 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,488 psi | 81% | 2717 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,498 psi | 70% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,620 psi | 53% | 2448 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 28,906 psi | 45% | 2392 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,518 psi | 53% | 2421 fps | 98.3% |
| Winchester 748 | <<locked>> | 80% | 51,735 psi | 81% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 39,784 psi | 62% | 2608 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,803 psi | 42% | 2395 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,369 psi | 74% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,137 psi | 72% | 2697 fps | 95.3% |
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 | 177gr | Sierra Hollow Point Boat Tail - Closed Nose . Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,946 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 177.0 gr projectile in 0.308" calls for a 1:12.5 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.