Load Specifications
Load data in caliber .300 WSM with .308 | 178gr | Remington SP Extended-Range 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 ReloadSwiss RS 70.
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% | 56,565 psi | 89% | 2756 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,666 psi | 87% | 2782 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,343 psi | 80% | 2805 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 56,898 psi | 89% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,493 psi | 90% | 2917 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,941 psi | 88% | 2838 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,087 psi | 89% | 2841 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,694 psi | 86% | 2900 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,518 psi | 82% | 2890 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,217 psi | 88% | 2966 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,288 psi | 85% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,578 psi | 86% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,534 psi | 85% | 2920 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,811 psi | 87% | 2946 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2943 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 2887 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,211 psi | 76% | 2828 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,018 psi | 66% | 2743 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 3022 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,941 psi | 88% | 2858 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,992 psi | 74% | 2812 fps | 96.3% |
| Bofors RP3 | <<locked>> | 86% | 54,926 psi | 86% | 2831 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 2887 fps | 97.4% |
| Bofors RP7 | <<locked>> | 90% | 54,462 psi | 85% | 2812 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 55,506 psi | 87% | 2848 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,377 psi | 90% | 2933 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 92% | 54,302 psi | 85% | 2848 fps | 98% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2877 fps | 96% |
| Hodgdon H4895 | <<locked>> | 82% | 56,579 psi | 89% | 2848 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,737 psi | 86% | 2841 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,985 psi | 89% | 2887 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,246 psi | 88% | 2953 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,565 psi | 89% | 2835 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,767 psi | 87% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,970 psi | 88% | 2818 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,911 psi | 86% | 2795 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 55,230 psi | 87% | 2844 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,130 psi | 88% | 2841 fps | 99.1% |
| IMR 4831 | <<locked>> | 98% | 54,969 psi | 86% | 2864 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,999 psi | 88% | 2864 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,302 psi | 85% | 2828 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,780 psi | 84% | 2927 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 56,217 psi | 88% | 2812 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,752 psi | 86% | 2762 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,550 psi | 89% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,173 psi | 88% | 2838 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 57,464 psi | 90% | 2881 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,641 psi | 67% | 2657 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 54,578 psi | 86% | 2779 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,216 psi | 87% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,334 psi | 90% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,231 psi | 88% | 2900 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2972 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 56,101 psi | 88% | 2900 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,360 psi | 85% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,432 psi | 84% | 2930 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 54,940 psi | 86% | 2904 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,169 psi | 79% | 2848 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,448 psi | 87% | 2831 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,535 psi | 87% | 2907 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,259 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,421 psi | 90% | 2943 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,825 psi | 87% | 2969 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 55,405 psi | 87% | 2785 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,013 psi | 86% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,478 psi | 89% | 2871 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,855 psi | 89% | 2933 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 54,462 psi | 85% | 2812 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,173 psi | 88% | 2838 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,217 psi | 88% | 2812 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,550 psi | 89% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,464 psi | 90% | 2881 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,652 psi | 89% | 2887 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,246 psi | 90% | 2844 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,404 psi | 85% | 2812 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,390 psi | 87% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,246 psi | 88% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,912 psi | 88% | 2789 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 2927 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 55,114 psi | 86% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,913 psi | 89% | 2831 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,969 psi | 86% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,781 psi | 86% | 2808 fps | 95.8% |
| Somchem S365 | <<locked>> | 96% | 55,013 psi | 86% | 2900 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 2907 fps | 99% |
| Unknown powder | <<locked>> | 92% | 56,811 psi | 89% | 2907 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,622 psi | 87% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,579 psi | 87% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,027 psi | 86% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,681 psi | 89% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,232 psi | 90% | 2874 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,993 psi | 75% | 2743 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,723 psi | 86% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,624 psi | 90% | 2923 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2904 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,288 psi | 85% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,377 psi | 90% | 2933 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,424 psi | 68% | 2877 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,115 psi | 88% | 2877 fps | 98% |
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% | 49,821 psi | 78% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,830 psi | 67% | 2562 fps | 96% |
| Accurate 3100 | <<locked>> | 88% | 34,171 psi | 54% | 2477 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 47,181 psi | 74% | 2671 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,636 psi | 56% | 2526 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,562 psi | 82% | 2789 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,556 psi | 70% | 2638 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 45,005 psi | 71% | 2726 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 49,182 psi | 77% | 2831 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,834 psi | 77% | 2848 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,034 psi | 71% | 2667 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,080 psi | 75% | 2733 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,954 psi | 55% | 2536 fps | 97.6% |
| Alliant Reloder-17 | 58.9 gr | 80% | 39,378 psi | 62% | 2661 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,585 psi | 70% | 2723 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,657 psi | 70% | 2769 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,180 psi | 43% | 2343 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,809 psi | 55% | 2569 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 84% | 31,067 psi | 49% | 2510 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,098 psi | 82% | 2799 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 44,019 psi | 69% | 2753 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 45,179 psi | 71% | 2677 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,657 psi | 70% | 2769 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 39,871 psi | 62% | 2543 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 45,571 psi | 71% | 2684 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 40,828 psi | 64% | 2641 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 84% | 42,337 psi | 66% | 2628 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,605 psi | 81% | 2822 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 53,127 psi | 83% | 2795 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,387 psi | 51% | 2431 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,789 psi | 73% | 2730 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,189 psi | 61% | 2638 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 42% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,007 psi | 74% | 2684 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,240 psi | 77% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,918 psi | 69% | 2618 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,134 psi | 68% | 2585 fps | 96.9% |
| IMR 4350 | <<locked>> | 84% | 40,567 psi | 64% | 2579 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,336 psi | 65% | 2575 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 31,169 psi | 49% | 2402 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 49,313 psi | 77% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,995 psi | 80% | 2772 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 50,357 psi | 79% | 2864 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 80% | 52,692 psi | 83% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,488 psi | 81% | 2713 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,007 psi | 74% | 2671 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,957 psi | 61% | 2530 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 37,144 psi | 58% | 2507 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 35,186 psi | 55% | 2500 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 51,488 psi | 81% | 2733 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,054 psi | 82% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,442 psi | 74% | 2720 fps | 100% |
| Norma 204 | <<locked>> | 88% | 45,774 psi | 72% | 2723 fps | 95.7% |
| Norma MRP | <<locked>> | 90% | 38,348 psi | 60% | 2664 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,592 psi | 56% | 2523 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 47,442 psi | 74% | 2740 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 49,647 psi | 78% | 2861 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 34,447 psi | 54% | 2507 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 96% | 43,018 psi | 67% | 2717 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 43% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,585 psi | 71% | 2664 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,721 psi | 81% | 2844 fps | 100% |
| ReloadSwiss RS 60 | 58.9 gr | 80% | 41,858 psi | 66% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,360 psi | 55% | 2543 fps | 97.1% |
| ReloadSwiss RS 70 | 59.8 gr | 80% | 34,432 psi | 54% | 2543 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 49,008 psi | 77% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,598 psi | 67% | 2621 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 49,879 psi | 78% | 2762 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 92% | 43,540 psi | 68% | 2703 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 39,871 psi | 62% | 2543 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,957 psi | 61% | 2530 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,692 psi | 83% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,007 psi | 74% | 2671 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,144 psi | 58% | 2507 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,526 psi | 68% | 2671 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,505 psi | 84% | 2792 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,952 psi | 80% | 2756 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,185 psi | 82% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,019 psi | 69% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,029 psi | 60% | 2470 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,120 psi | 68% | 2697 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 52,083 psi | 82% | 2667 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,011 psi | 83% | 2776 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,033 psi | 67% | 2625 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 51,256 psi | 80% | 2756 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 32,053 psi | 50% | 2480 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 38,928 psi | 61% | 2579 fps | 95% |
| Unknown powder | <<locked>> | 80% | 38,406 psi | 60% | 2579 fps | 97.5% |
| Vihtavuori N133 | <<locked>> | 80% | 49,385 psi | 77% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,994 psi | 77% | 2651 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,689 psi | 76% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,796 psi | 58% | 2474 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 38,348 psi | 60% | 2552 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 96% | 42,090 psi | 66% | 2635 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,327 psi | 76% | 2680 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,001 psi | 61% | 2595 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 27,891 psi | 44% | 2365 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,085 psi | 57% | 2493 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 40,828 psi | 64% | 2641 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,628 psi | 40% | 2365 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,078 psi | 71% | 2697 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 111 powders for .300 WSM loaded with the .308 | 178gr | Remington SP Extended-Range. Alliant Reloder-26 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,755 fps to 3,022 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 178.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, ReloadSwiss RS 70 rank at the top here: for .300 WSM with the .308 | 178gr | Remington SP Extended-Range they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.