Load Specifications
Load data in caliber .300 WSM with .308 | 160gr | Warner Tool Co. Flat Line bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and Hodgdon Superformance.
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>> | 84% | 54,926 psi | 86% | 2822 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,942 psi | 89% | 2897 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,363 psi | 90% | 2897 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 57,653 psi | 90% | 2953 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 57,624 psi | 90% | 2900 fps | 97.2% |
| Accurate 4064 | <<locked>> | 92% | 57,101 psi | 89% | 2940 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3028 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 57,464 psi | 90% | 2976 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,187 psi | 86% | 2923 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,695 psi | 89% | 2927 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,653 psi | 90% | 2900 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,566 psi | 90% | 3104 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,245 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,622 psi | 87% | 2966 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3031 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,014 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,175 psi | 61% | 2759 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,801 psi | 69% | 2920 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,522 psi | 90% | 2992 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 55,912 psi | 88% | 2963 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,767 psi | 87% | 2927 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,984 psi | 86% | 2861 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,159 psi | 88% | 2959 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,157 psi | 85% | 3002 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 56,536 psi | 89% | 2910 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,826 psi | 89% | 2976 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 54,375 psi | 85% | 2995 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 98% | 54,955 psi | 86% | 2953 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,752 psi | 86% | 2936 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,024 psi | 80% | 2907 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,740 psi | 90% | 3022 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,348 psi | 90% | 3064 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,433 psi | 56% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,665 psi | 86% | 2917 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,623 psi | 89% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,348 psi | 90% | 2946 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,536 psi | 89% | 2913 fps | 97.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 2953 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,696 psi | 90% | 2959 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2864 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 57,043 psi | 89% | 2999 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,695 psi | 89% | 2927 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,869 psi | 89% | 2910 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,653 psi | 90% | 2953 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,000 psi | 89% | 2900 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,607 psi | 86% | 2907 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,116 psi | 90% | 2956 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 54,665 psi | 86% | 2936 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 56,246 psi | 88% | 2920 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,811 psi | 89% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,853 psi | 86% | 2953 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3005 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 55,912 psi | 88% | 3012 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 55,564 psi | 87% | 2982 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3009 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 57,072 psi | 89% | 2946 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,492 psi | 89% | 2966 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,522 psi | 90% | 2930 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,868 psi | 56% | 1837 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,941 psi | 88% | 2907 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,159 psi | 90% | 2956 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,289 psi | 88% | 3038 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,608 psi | 87% | 3071 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3051 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3081 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 57,246 psi | 90% | 2900 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,927 psi | 89% | 2920 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,521 psi | 87% | 2953 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,767 psi | 87% | 2927 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,116 psi | 90% | 2956 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,653 psi | 90% | 2953 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,607 psi | 86% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,665 psi | 86% | 2936 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,566 psi | 90% | 3018 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,463 psi | 87% | 2923 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,101 psi | 88% | 2949 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,534 psi | 85% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,621 psi | 86% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 57,682 psi | 90% | 2907 fps | 98% |
| Somchem S321 | <<locked>> | 82% | 54,317 psi | 85% | 2907 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,101 psi | 89% | 2854 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,056 psi | 86% | 2917 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 55,970 psi | 88% | 2949 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 2963 fps | 100% |
| Unknown powder | <<locked>> | 98% | 57,305 psi | 90% | 3025 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 84% | 56,463 psi | 88% | 2805 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,203 psi | 90% | 2831 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,521 psi | 89% | 2881 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,594 psi | 89% | 2890 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,145 psi | 90% | 2927 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,302 psi | 85% | 2943 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 56,347 psi | 88% | 2933 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,405 psi | 88% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,375 psi | 85% | 2989 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,815 psi | 67% | 2835 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,332 psi | 87% | 2936 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,027 psi | 85% | 2930 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,375 psi | 85% | 2995 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,940 psi | 55% | 2749 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,319 psi | 90% | 2976 fps | 100% |
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% | 48,660 psi | 76% | 2730 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,359 psi | 84% | 2848 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,350 psi | 65% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,847 psi | 73% | 2792 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,413 psi | 74% | 2733 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,117 psi | 61% | 2648 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,273 psi | 55% | 2625 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,773 psi | 70% | 2762 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 38,087 psi | 60% | 2605 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,833 psi | 73% | 2769 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,094 psi | 74% | 2756 fps | 100% |
| Alliant Power Pro 2000-MR | 54.7 gr | 80% | 40,828 psi | 64% | 2789 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,797 psi | 59% | 2631 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,509 psi | 63% | 2694 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,331 psi | 55% | 2635 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,547 psi | 51% | 2589 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,516 psi | 48% | 2530 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,956 psi | 59% | 2782 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,005 psi | 69% | 2762 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 37,449 psi | 59% | 2635 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 46,441 psi | 73% | 2766 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,515 psi | 76% | 2759 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,861 psi | 72% | 2795 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,444 psi | 79% | 2940 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 49,792 psi | 78% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,189 psi | 60% | 2635 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 88% | 44,179 psi | 69% | 2812 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 96% | 51,532 psi | 81% | 2897 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 45,165 psi | 71% | 2772 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,443 psi | 48% | 2474 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,769 psi | 61% | 2690 fps | 98.7% |
| Hodgdon Superformance | 65.4 gr | 92% | 46,151 psi | 72% | 2867 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,411 psi | 41% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,147 psi | 63% | 2657 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,249 psi | 65% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,405 psi | 59% | 2585 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,614 psi | 70% | 2703 fps | 95.2% |
| IMR 4350 | <<locked>> | 94% | 46,557 psi | 73% | 2792 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,324 psi | 71% | 2749 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 34,983 psi | 55% | 2598 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 41,466 psi | 65% | 2726 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,833 psi | 73% | 2769 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 53,301 psi | 84% | 2861 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,048 psi | 69% | 2743 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,759 psi | 70% | 2697 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,900 psi | 63% | 2648 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 39,610 psi | 62% | 2638 fps | 95.3% |
| Lovex S070 | <<locked>> | 90% | 42,540 psi | 67% | 2720 fps | 95% |
| Norma 201 | <<locked>> | 80% | 43,903 psi | 69% | 2713 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 44,237 psi | 69% | 2723 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,900 psi | 63% | 2684 fps | 98.2% |
| Norma 204 | <<locked>> | 98% | 53,185 psi | 83% | 2946 fps | 95.3% |
| Norma URP | <<locked>> | 86% | 35,534 psi | 56% | 2625 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 39,523 psi | 62% | 2694 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 42,119 psi | 66% | 2776 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 46,746 psi | 73% | 2776 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,282 psi | 73% | 2795 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,618 psi | 79% | 2822 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,687 psi | 42% | 1644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,489 psi | 82% | 2851 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,278 psi | 65% | 2674 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,670 psi | 67% | 2802 fps | 98.3% |
| ReloadSwiss RS 60 | 53.8 gr | 80% | 34,650 psi | 54% | 2661 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,333 psi | 59% | 2697 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,176 psi | 63% | 2766 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 47,993 psi | 75% | 2759 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,858 psi | 66% | 2667 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,244 psi | 55% | 2579 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 46,441 psi | 73% | 2766 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,610 psi | 62% | 2638 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,048 psi | 69% | 2743 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,900 psi | 63% | 2648 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 42,540 psi | 67% | 2720 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,158 psi | 57% | 2625 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,208 psi | 71% | 2749 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,308 psi | 68% | 2730 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,165 psi | 71% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,594 psi | 59% | 2530 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,498 psi | 70% | 2690 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 50,734 psi | 80% | 2851 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,875 psi | 70% | 2667 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,788 psi | 70% | 2746 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,027 psi | 56% | 2582 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 27,876 psi | 44% | 2457 fps | 95.9% |
| Unknown powder | <<locked>> | 86% | 38,667 psi | 61% | 2687 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 50,096 psi | 79% | 2717 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,728 psi | 67% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,191 psi | 65% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,307 psi | 65% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,734 psi | 48% | 2431 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 84% | 36,216 psi | 57% | 2605 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 49,385 psi | 77% | 2825 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,002 psi | 64% | 2667 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,782 psi | 58% | 2651 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 32,924 psi | 52% | 2612 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,356 psi | 48% | 2434 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 50,343 psi | 79% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,179 psi | 69% | 2812 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,806 psi | 48% | 2615 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,534 psi | 84% | 2920 fps | 100% |
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 100 powders for .300 WSM loaded with the .308 | 160gr | Warner Tool Co. Flat Line. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,104 fps. Accurate 4350 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 60, Alliant Power Pro 2000-MR, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 160gr | Warner Tool Co. Flat Line 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.