Load Specifications
Bullet Manufacturer:Speer
Bullet Weight:165 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:1:14.5
Load data in caliber .300 WSM with .308 | 165gr | Speer Deep Curl Soft Point bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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% | 55,637 psi | 87% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,013 psi | 86% | 2835 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,824 psi | 86% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,592 psi | 86% | 2841 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,716 psi | 72% | 2795 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 55,071 psi | 86% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,071 psi | 86% | 2976 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,853 psi | 86% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,970 psi | 88% | 2917 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2953 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,174 psi | 90% | 2913 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,911 psi | 86% | 2835 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,810 psi | 86% | 3038 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2949 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,347 psi | 88% | 2940 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,681 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,130 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,537 psi | 90% | 3068 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2940 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,134 psi | 68% | 2825 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,849 psi | 77% | 3002 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,592 psi | 86% | 2927 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 56,985 psi | 89% | 2956 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,753 psi | 89% | 2930 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,230 psi | 87% | 2841 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,898 psi | 89% | 2943 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,130 psi | 90% | 2890 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,143 psi | 85% | 2917 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 92% | 55,550 psi | 87% | 2992 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 56,043 psi | 88% | 2956 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 55,448 psi | 87% | 2923 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,014 psi | 88% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,288 psi | 87% | 2959 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,433 psi | 85% | 3005 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 56% | 1798 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,622 psi | 87% | 2910 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,201 psi | 85% | 2881 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,737 psi | 86% | 2887 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,261 psi | 90% | 2913 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 57,145 psi | 90% | 2956 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,172 psi | 86% | 2907 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,823 psi | 83% | 2923 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,476 psi | 85% | 2936 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,174 psi | 90% | 2913 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,824 psi | 86% | 2887 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,566 psi | 90% | 2890 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,434 psi | 87% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,766 psi | 86% | 2900 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 55,738 psi | 87% | 2936 fps | 98.6% |
| Norma 201 | <<locked>> | 86% | 57,072 psi | 89% | 2910 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,696 psi | 90% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,927 psi | 88% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,476 psi | 85% | 2953 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 48,327 psi | 76% | 2953 fps | 97.1% |
| Norma URP | <<locked>> | 98% | 57,725 psi | 90% | 3018 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 56,681 psi | 89% | 2976 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,536 psi | 89% | 3015 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 57,551 psi | 90% | 2940 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,290 psi | 90% | 2953 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,302 psi | 85% | 2897 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,667 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,246 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,998 psi | 86% | 3002 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,027 psi | 85% | 3025 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,418 psi | 85% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,682 psi | 90% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,855 psi | 89% | 2946 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 2920 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 56,753 psi | 89% | 2930 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,766 psi | 86% | 2900 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,824 psi | 86% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,434 psi | 87% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,738 psi | 87% | 2936 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,172 psi | 86% | 2956 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,985 psi | 88% | 2913 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,927 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,839 psi | 86% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,187 psi | 86% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,781 psi | 86% | 2851 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2913 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 54,230 psi | 85% | 2789 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,622 psi | 87% | 2904 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,145 psi | 90% | 2943 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 3015 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2900 fps | 97.2% |
| Unknown powder | <<locked>> | 94% | 54,998 psi | 86% | 2969 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 82% | 56,739 psi | 89% | 2785 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,679 psi | 86% | 2776 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,711 psi | 90% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,290 psi | 90% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,114 psi | 86% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,492 psi | 87% | 2940 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 56,710 psi | 89% | 2917 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,246 psi | 90% | 2907 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,869 psi | 88% | 2989 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2900 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,536 psi | 89% | 2930 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,550 psi | 87% | 2992 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2848 fps | 99.8% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 2927 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 2015 | <<locked>> | 80% | 52,301 psi | 82% | 2759 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,223 psi | 71% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,995 psi | 80% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,962 psi | 70% | 2677 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 37,173 psi | 58% | 2625 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 42,757 psi | 67% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,953 psi | 53% | 2569 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,428 psi | 76% | 2808 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,118 psi | 64% | 2654 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 49,690 psi | 78% | 2890 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,473 psi | 79% | 2808 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,430 psi | 81% | 2789 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,324 psi | 69% | 2848 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 49,603 psi | 78% | 2890 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,089 psi | 64% | 2677 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,019 psi | 69% | 2743 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,923 psi | 50% | 2526 fps | 95% |
| Alliant Reloder-17 | 57 gr | 80% | 35,549 psi | 56% | 2654 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,892 psi | 77% | 2881 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,617 psi | 46% | 2487 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,229 psi | 54% | 2671 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,776 psi | 75% | 2812 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,031 psi | 64% | 2684 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,324 psi | 69% | 2710 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,837 psi | 81% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,748 psi | 78% | 2835 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 53,693 psi | 84% | 2841 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,698 psi | 65% | 2690 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 84% | 42,366 psi | 66% | 2753 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 90% | 46,543 psi | 73% | 2789 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 48,892 psi | 77% | 2818 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,312 psi | 46% | 2425 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,583 psi | 67% | 2746 fps | 99.7% |
| Hodgdon Superformance | 66.3 gr | 88% | 43,903 psi | 69% | 2812 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 42% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,352 psi | 68% | 2700 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 44,817 psi | 70% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,408 psi | 63% | 2631 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,525 psi | 67% | 2648 fps | 95.5% |
| IMR 4350 | <<locked>> | 90% | 44,541 psi | 70% | 2736 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,091 psi | 68% | 2687 fps | 95.6% |
| IMR 4831 | <<locked>> | 84% | 31,894 psi | 50% | 2500 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 45,136 psi | 71% | 2776 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,473 psi | 79% | 2808 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,921 psi | 75% | 2782 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,921 psi | 75% | 2736 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,221 psi | 68% | 2690 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,840 psi | 59% | 2582 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 40,828 psi | 64% | 2664 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,355 psi | 74% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,790 psi | 75% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,395 psi | 68% | 2733 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 50,908 psi | 80% | 2894 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 42,221 psi | 66% | 2828 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 34,142 psi | 54% | 2569 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,120 psi | 68% | 2746 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,072 psi | 60% | 2667 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,343 psi | 79% | 2822 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,169 psi | 79% | 2841 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 43% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,945 psi | 66% | 2671 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,702 psi | 73% | 2854 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,826 psi | 59% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,721 psi | 53% | 2585 fps | 95.3% |
| ReloadSwiss RS 70 | 60.8 gr | 84% | 35,824 psi | 56% | 2648 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,503 psi | 81% | 2792 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,034 psi | 71% | 2707 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,580 psi | 60% | 2628 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 47,703 psi | 75% | 2861 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 44,324 psi | 69% | 2710 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,840 psi | 59% | 2582 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,921 psi | 75% | 2782 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,221 psi | 68% | 2690 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,828 psi | 64% | 2664 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,421 psi | 62% | 2674 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,892 psi | 77% | 2799 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,731 psi | 73% | 2772 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,428 psi | 76% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,582 psi | 64% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,366 psi | 66% | 2635 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,239 psi | 74% | 2854 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,196 psi | 76% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,631 psi | 76% | 2792 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,204 psi | 61% | 2631 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,732 psi | 45% | 2467 fps | 97.2% |
| Somchem S385 | <<locked>> | 96% | 45,484 psi | 71% | 2789 fps | 95.8% |
| Unknown powder | <<locked>> | 80% | 34,737 psi | 54% | 2572 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 53,374 psi | 84% | 2740 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,861 psi | 72% | 2644 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,802 psi | 70% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,686 psi | 70% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,518 psi | 53% | 2480 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,708 psi | 54% | 2546 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 53,287 psi | 84% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,411 psi | 70% | 2703 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,302 psi | 55% | 2592 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 88% | 32,111 psi | 50% | 2566 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,953 psi | 52% | 2490 fps | 97.5% |
| Winchester 760 | <<locked>> | 84% | 42,366 psi | 66% | 2753 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,992 psi | 44% | 2510 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,241 psi | 79% | 2861 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 101 powders for .300 WSM loaded with the .308 | 165gr | Speer Deep Curl Soft Point. Alliant Reloder-17 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,068 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 165.0 gr projectile in 0.308" calls for a 1:14.5 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 165gr | Speer Deep Curl Soft Point 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.