Load Specifications
Load data in caliber .300 WSM with .308 | 150gr | Alaska Bullet Works Kodiak SP SPBC bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 56,405 psi | 88% | 2956 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,419 psi | 87% | 2982 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,405 psi | 87% | 3035 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,405 psi | 87% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,637 psi | 87% | 2982 fps | 96.8% |
| Accurate 4064 | <<locked>> | 90% | 55,608 psi | 87% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,622 psi | 87% | 3117 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 55,535 psi | 87% | 3061 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,579 psi | 89% | 3061 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,679 psi | 86% | 3012 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,651 psi | 87% | 2989 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,448 psi | 87% | 3186 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,971 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,348 psi | 90% | 3107 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,376 psi | 88% | 3173 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,302 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,509 psi | 63% | 2884 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,730 psi | 72% | 3061 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,593 psi | 87% | 3077 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 57,740 psi | 90% | 3104 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,435 psi | 90% | 3068 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,260 psi | 88% | 2995 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,186 psi | 85% | 3041 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,072 psi | 88% | 3143 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,433 psi | 85% | 2995 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,969 psi | 86% | 3058 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 94% | 56,115 psi | 88% | 3133 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 98% | 56,724 psi | 89% | 3094 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 56,086 psi | 88% | 3071 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3041 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,970 psi | 88% | 3107 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,303 psi | 87% | 3143 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 56% | 1890 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,318 psi | 88% | 3058 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,592 psi | 86% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,434 psi | 87% | 3031 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,766 psi | 86% | 2999 fps | 97.4% |
| IMR 4350 | <<locked>> | 98% | 54,418 psi | 85% | 3038 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,883 psi | 88% | 3045 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,719 psi | 78% | 3002 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 55,172 psi | 86% | 3084 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,679 psi | 86% | 3012 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,695 psi | 87% | 3038 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,998 psi | 86% | 2986 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,985 psi | 88% | 3038 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,288 psi | 87% | 3038 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 56,318 psi | 88% | 3074 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 54,273 psi | 85% | 3005 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,013 psi | 86% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,550 psi | 89% | 3094 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 54,389 psi | 85% | 3100 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 57,493 psi | 90% | 3120 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,884 psi | 89% | 3153 fps | 98.6% |
| Ramshot TAC | <<locked>> | 84% | 54,795 psi | 86% | 3025 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,418 psi | 85% | 3045 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,376 psi | 87% | 3009 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,013 psi | 56% | 1932 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,508 psi | 90% | 3045 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,085 psi | 86% | 3038 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,346 psi | 85% | 3120 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,911 psi | 84% | 3156 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,172 psi | 86% | 3133 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,737 psi | 86% | 3166 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 55,187 psi | 86% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,810 psi | 86% | 3002 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,551 psi | 90% | 3094 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,435 psi | 90% | 3068 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,288 psi | 87% | 3038 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,695 psi | 87% | 3038 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,985 psi | 88% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,318 psi | 88% | 3074 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,695 psi | 87% | 3100 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,145 psi | 90% | 3061 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,609 psi | 90% | 3084 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,738 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,999 psi | 88% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,637 psi | 87% | 2989 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 55,825 psi | 87% | 3041 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,100 psi | 86% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,724 psi | 89% | 3051 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 57,696 psi | 90% | 3091 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 3104 fps | 100% |
| Unknown powder | <<locked>> | 96% | 55,535 psi | 87% | 3110 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 82% | 54,433 psi | 85% | 2894 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,521 psi | 87% | 2923 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,636 psi | 86% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,578 psi | 86% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,434 psi | 87% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,231 psi | 88% | 3081 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,215 psi | 85% | 3018 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,462 psi | 85% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,304 psi | 88% | 3127 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,701 psi | 70% | 2969 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,348 psi | 90% | 3074 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,666 psi | 87% | 3068 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,115 psi | 88% | 3133 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,405 psi | 57% | 2884 fps | 98.5% |
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% | 49,951 psi | 78% | 2861 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,728 psi | 67% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,327 psi | 76% | 2923 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,327 psi | 76% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,791 psi | 76% | 2864 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 40,393 psi | 63% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 36,463 psi | 57% | 2746 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 46,064 psi | 72% | 2894 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 39,204 psi | 61% | 2730 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,109 psi | 75% | 2900 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,718 psi | 76% | 2887 fps | 100% |
| Alliant Power Pro 2000-MR | 59.1 gr | 80% | 42,003 psi | 66% | 2920 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,914 psi | 61% | 2753 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,771 psi | 65% | 2822 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,463 psi | 57% | 2762 fps | 95.7% |
| Alliant Reloder-17 | 58.2 gr | 80% | 33,634 psi | 53% | 2713 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,575 psi | 49% | 2651 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,869 psi | 58% | 2848 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,339 psi | 71% | 2894 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 38,653 psi | 61% | 2759 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 47,790 psi | 75% | 2897 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,617 psi | 78% | 2887 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,166 psi | 74% | 2923 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,228 psi | 82% | 3081 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 51,198 psi | 80% | 2943 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,407 psi | 62% | 2759 fps | 96% |
| Hodgdon H414 | <<locked>> | 88% | 45,643 psi | 72% | 2943 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 94% | 50,140 psi | 79% | 2979 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 46,485 psi | 73% | 2904 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,517 psi | 49% | 2595 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,074 psi | 63% | 2818 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 92% | 47,805 psi | 75% | 3009 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 42% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,336 psi | 65% | 2785 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 42,482 psi | 67% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,334 psi | 60% | 2707 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,716 psi | 72% | 2835 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 47,921 psi | 75% | 2923 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,514 psi | 73% | 2877 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 36,260 psi | 57% | 2723 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 42,757 psi | 67% | 2854 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 48,109 psi | 75% | 2900 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 45,455 psi | 71% | 2871 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,919 psi | 72% | 2825 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 41,104 psi | 64% | 2772 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 40,611 psi | 64% | 2759 fps | 95.4% |
| Lovex S070 | <<locked>> | 90% | 43,787 psi | 69% | 2848 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 45,121 psi | 71% | 2844 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 45,455 psi | 71% | 2851 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,118 psi | 64% | 2808 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 36,724 psi | 58% | 2749 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,727 psi | 64% | 2822 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 40,959 psi | 64% | 2851 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,008 psi | 75% | 2904 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,732 psi | 75% | 2930 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,808 psi | 81% | 2949 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 42% | 1732 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,925 psi | 85% | 2989 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,569 psi | 67% | 2802 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,121 psi | 69% | 2933 fps | 98.3% |
| ReloadSwiss RS 60 | 58.2 gr | 80% | 35,781 psi | 56% | 2789 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,274 psi | 57% | 2762 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,798 psi | 61% | 2831 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 49,037 psi | 77% | 2887 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,931 psi | 67% | 2792 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 36,361 psi | 57% | 2697 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 47,790 psi | 75% | 2897 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,611 psi | 64% | 2759 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,455 psi | 71% | 2871 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,104 psi | 64% | 2772 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 43,787 psi | 69% | 2848 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,304 psi | 58% | 2746 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,398 psi | 73% | 2877 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,527 psi | 70% | 2858 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,369 psi | 73% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,682 psi | 61% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,905 psi | 72% | 2818 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 52,185 psi | 82% | 2986 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,021 psi | 72% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,195 psi | 72% | 2874 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 37,130 psi | 58% | 2703 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 28,892 psi | 45% | 2579 fps | 96% |
| Unknown powder | <<locked>> | 84% | 37,420 psi | 59% | 2753 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 51,256 psi | 80% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,714 psi | 69% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,554 psi | 67% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,453 psi | 67% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,604 psi | 50% | 2546 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 84% | 37,507 psi | 59% | 2730 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 50,749 psi | 80% | 2959 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,177 psi | 66% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,913 psi | 59% | 2772 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 34,287 psi | 54% | 2740 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,299 psi | 49% | 2552 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 51,953 psi | 81% | 3009 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,643 psi | 72% | 2943 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,879 psi | 50% | 2743 fps | 96.2% |
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 116 powders for .300 WSM loaded with the .308 | 150gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,186 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,186 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 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 150.0 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 Reloder-16 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 150gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.