Load Specifications
Bullet:.308 | 170gr | Geco PLUS
Bullet Manufacturer:Geco
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:1:15.5
Load data in caliber .300 WSM with .308 | 170gr | Geco PLUS bullet and 101 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 Hodgdon H414.
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.
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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% | 56,840 psi | 89% | 2779 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,391 psi | 88% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,621 psi | 86% | 2818 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,123 psi | 74% | 2785 fps | 98.1% |
| Accurate 4064 | <<locked>> | 88% | 56,449 psi | 88% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,956 psi | 89% | 2963 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 56,086 psi | 88% | 2894 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,174 psi | 90% | 2897 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2936 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,795 psi | 86% | 2838 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,289 psi | 88% | 2808 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,217 psi | 88% | 3022 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2936 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,682 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,607 psi | 86% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,609 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,230 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2927 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,367 psi | 70% | 2812 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2710 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,430 psi | 79% | 2995 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,115 psi | 88% | 2910 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,897 psi | 86% | 2884 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,650 psi | 86% | 2858 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,318 psi | 88% | 2818 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,621 psi | 86% | 2871 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,448 psi | 87% | 2897 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 55,709 psi | 87% | 2956 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 92% | 55,767 psi | 87% | 2917 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 56,681 psi | 89% | 2900 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,215 psi | 85% | 2887 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,739 psi | 89% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,101 psi | 88% | 2999 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 56% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,259 psi | 85% | 2851 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,188 psi | 90% | 2881 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,753 psi | 89% | 2881 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,101 psi | 88% | 2858 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 55,100 psi | 86% | 2887 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,333 psi | 88% | 2890 fps | 98.6% |
| IMR 4831 | <<locked>> | 98% | 57,217 psi | 90% | 2949 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 56,028 psi | 88% | 2920 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,795 psi | 86% | 2838 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,159 psi | 88% | 2864 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,347 psi | 87% | 2822 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,710 psi | 89% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,014 psi | 88% | 2884 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 57,305 psi | 90% | 2923 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,102 psi | 61% | 2635 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 54,940 psi | 86% | 2838 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,506 psi | 87% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,217 psi | 90% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,869 psi | 88% | 2940 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 49,937 psi | 78% | 2946 fps | 97.8% |
| Norma URP | <<locked>> | 96% | 55,680 psi | 87% | 2946 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,433 psi | 85% | 2900 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,346 psi | 85% | 2943 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 54,984 psi | 86% | 2861 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,013 psi | 86% | 2881 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,506 psi | 87% | 2881 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,332 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,940 psi | 86% | 2992 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,594 psi | 89% | 2982 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,434 psi | 87% | 3012 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 55,854 psi | 88% | 2815 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,550 psi | 87% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,781 psi | 86% | 2877 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 2910 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2910 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 54,650 psi | 86% | 2858 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,014 psi | 88% | 2884 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,159 psi | 88% | 2864 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,710 psi | 89% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,305 psi | 90% | 2923 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,536 psi | 89% | 2936 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,551 psi | 90% | 2900 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,592 psi | 86% | 2864 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,941 psi | 88% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,623 psi | 89% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,246 psi | 88% | 2838 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 2904 fps | 96.8% |
| Somchem S335 | <<locked>> | 84% | 55,608 psi | 87% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,188 psi | 90% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,071 psi | 86% | 2874 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,244 psi | 85% | 2949 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2887 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 84% | 56,347 psi | 88% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,550 psi | 87% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,927 psi | 88% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,420 psi | 88% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,360 psi | 85% | 2887 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 55,477 psi | 87% | 2841 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,624 psi | 90% | 2858 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,072 psi | 89% | 2946 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,603 psi | 78% | 2890 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,259 psi | 85% | 2861 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,825 psi | 87% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,956 psi | 88% | 2963 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,914 psi | 63% | 2844 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,520 psi | 85% | 2871 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,096 psi | 79% | 2825 fps | 96% |
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% | 53,461 psi | 84% | 2736 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,456 psi | 73% | 2667 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,802 psi | 70% | 2648 fps | 95.7% |
| Accurate 3100 | <<locked>> | 92% | 35,926 psi | 56% | 2566 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,961 psi | 69% | 2671 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,793 psi | 51% | 2507 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 49,516 psi | 78% | 2789 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,061 psi | 66% | 2638 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 47,863 psi | 75% | 2822 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,576 psi | 81% | 2789 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,750 psi | 83% | 2762 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,527 psi | 71% | 2835 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 47,863 psi | 75% | 2825 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,119 psi | 66% | 2661 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,136 psi | 71% | 2730 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,735 psi | 51% | 2520 fps | 95.9% |
| Alliant Reloder-17 | 57.1 gr | 80% | 36,506 psi | 57% | 2641 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,210 psi | 74% | 2815 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,645 psi | 45% | 2428 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,709 psi | 58% | 2654 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,837 psi | 51% | 2602 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,936 psi | 77% | 2795 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 42,134 psi | 66% | 2671 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,467 psi | 67% | 2641 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,127 psi | 83% | 2772 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,952 psi | 80% | 2815 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,757 psi | 67% | 2674 fps | 98.1% |
| Hodgdon H414 | 58.7 gr | 84% | 39,958 psi | 63% | 2671 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 46,151 psi | 72% | 2749 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 50,009 psi | 78% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,153 psi | 47% | 2418 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,267 psi | 73% | 2776 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 42,018 psi | 66% | 2740 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 42% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,819 psi | 75% | 2746 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,111 psi | 79% | 2779 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,208 psi | 69% | 2671 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,528 psi | 73% | 2694 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 42,989 psi | 67% | 2674 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,510 psi | 65% | 2621 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,720 psi | 50% | 2461 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 46,238 psi | 72% | 2759 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,576 psi | 81% | 2789 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,168 psi | 77% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,907 psi | 77% | 2717 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,309 psi | 69% | 2674 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,506 psi | 57% | 2516 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 39,407 psi | 62% | 2602 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 36,651 psi | 57% | 2582 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 48,428 psi | 76% | 2736 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,950 psi | 77% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,498 psi | 70% | 2717 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 48,820 psi | 77% | 2822 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 40,654 psi | 64% | 2759 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,982 psi | 52% | 2507 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 44,251 psi | 69% | 2730 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 36,593 psi | 57% | 2602 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,401 psi | 81% | 2805 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,372 psi | 81% | 2825 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,931 psi | 67% | 2657 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,240 psi | 76% | 2841 fps | 99.7% |
| ReloadSwiss RS 60 | 57.1 gr | 80% | 38,841 psi | 61% | 2707 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,460 psi | 51% | 2520 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 34,447 psi | 54% | 2579 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,634 psi | 82% | 2769 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,050 psi | 72% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,624 psi | 62% | 2615 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 52,895 psi | 83% | 2854 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 96% | 46,035 psi | 72% | 2795 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 42,467 psi | 67% | 2641 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,506 psi | 57% | 2516 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,168 psi | 77% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,309 psi | 69% | 2674 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 39,407 psi | 62% | 2602 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,698 psi | 64% | 2667 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,038 psi | 78% | 2782 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,037 psi | 75% | 2759 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,443 psi | 77% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,495 psi | 65% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,582 psi | 64% | 2566 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,600 psi | 71% | 2792 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,211 psi | 77% | 2677 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,777 psi | 78% | 2776 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,205 psi | 63% | 2618 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,602 psi | 46% | 2461 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 43,772 psi | 69% | 2720 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,908 psi | 78% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,934 psi | 72% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,398 psi | 73% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,319 psi | 60% | 2549 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,330 psi | 54% | 2510 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,880 psi | 81% | 2785 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,802 psi | 70% | 2664 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,881 psi | 53% | 2507 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 31,111 psi | 49% | 2503 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,794 psi | 53% | 2480 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 52,011 psi | 82% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 40,118 psi | 63% | 2671 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,006 psi | 42% | 2448 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,601 psi | 75% | 2762 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,731 psi | 73% | 2766 fps | 95.2% |
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 | 170gr | Geco PLUS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,775 fps to 3,022 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 170.0 gr projectile in 0.308" calls for a 1:15.5 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. Alliant Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .300 WSM with the .308 | 170gr | Geco PLUS 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.