Load Specifications
Load data in caliber .300 WSM with .308 | 150gr | Woodleigh HS bullet and 96 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, Hodgdon Superformance 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.
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>> | 84% | 56,376 psi | 88% | 2956 fps | 100% |
| Accurate 2495 | <<locked>> | 84% | 54,230 psi | 85% | 2989 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,434 psi | 87% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,448 psi | 87% | 2976 fps | 96.7% |
| Accurate 4064 | <<locked>> | 90% | 55,288 psi | 87% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,405 psi | 87% | 3114 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 55,550 psi | 87% | 3061 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,608 psi | 89% | 3058 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,389 psi | 85% | 3005 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,347 psi | 87% | 2986 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,201 psi | 87% | 3179 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,695 psi | 89% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,392 psi | 90% | 3107 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3173 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,070 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,509 psi | 63% | 2884 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 3058 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,390 psi | 87% | 3071 fps | 99.5% |
| Bofors RP3 | <<locked>> | 92% | 57,421 psi | 90% | 3097 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,464 psi | 90% | 3064 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,985 psi | 88% | 2989 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,925 psi | 85% | 3035 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,782 psi | 87% | 3140 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,447 psi | 85% | 2992 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,708 psi | 86% | 3054 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 94% | 56,188 psi | 88% | 3133 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 98% | 56,463 psi | 88% | 3091 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 56,101 psi | 88% | 3071 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,562 psi | 82% | 3038 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,738 psi | 87% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,114 psi | 86% | 3140 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 56% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,057 psi | 88% | 3054 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,578 psi | 86% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,158 psi | 86% | 3025 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,520 psi | 85% | 2995 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 54,201 psi | 85% | 3031 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,651 psi | 87% | 3041 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2999 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 55,187 psi | 86% | 3084 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,389 psi | 85% | 3005 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,434 psi | 87% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,984 psi | 86% | 2982 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,999 psi | 88% | 3038 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,317 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% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,752 psi | 86% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,550 psi | 89% | 3094 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 54,360 psi | 85% | 3097 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 57,203 psi | 90% | 3117 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3146 fps | 98.6% |
| Ramshot TAC | <<locked>> | 84% | 54,824 psi | 86% | 3025 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,418 psi | 85% | 3041 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,129 psi | 86% | 3005 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,114 psi | 57% | 1932 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,246 psi | 90% | 3038 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,100 psi | 86% | 3035 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,085 psi | 85% | 3117 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,609 psi | 90% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,984 psi | 86% | 3130 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,549 psi | 85% | 3159 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 55,187 psi | 86% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,824 psi | 86% | 3002 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,276 psi | 90% | 3087 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,464 psi | 90% | 3064 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,317 psi | 87% | 3038 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,434 psi | 87% | 3035 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,999 psi | 88% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,318 psi | 88% | 3074 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,405 psi | 87% | 3097 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,913 psi | 89% | 3058 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,609 psi | 90% | 3084 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,753 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,028 psi | 88% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,738 psi | 87% | 2989 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 55,593 psi | 87% | 3038 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,071 psi | 86% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,478 psi | 89% | 3048 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 57,464 psi | 90% | 3087 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,257 psi | 82% | 3100 fps | 100% |
| Unknown powder | <<locked>> | 96% | 55,245 psi | 87% | 3104 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 84% | 57,479 psi | 90% | 2933 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,259 psi | 87% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,607 psi | 86% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,578 psi | 86% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,448 psi | 87% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,956 psi | 88% | 3077 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 57,580 psi | 90% | 3068 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,740 psi | 90% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,289 psi | 88% | 3130 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,440 psi | 70% | 2966 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,377 psi | 90% | 3071 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,405 psi | 87% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,188 psi | 88% | 3133 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,230 psi | 57% | 2881 fps | 98.4% |
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% | 49,676 psi | 78% | 2858 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,514 psi | 74% | 2887 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,095 psi | 75% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,602 psi | 76% | 2861 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 40,132 psi | 63% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 36,448 psi | 57% | 2746 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 45,818 psi | 72% | 2887 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 38,986 psi | 61% | 2723 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,892 psi | 75% | 2897 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,414 psi | 76% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | 59 gr | 80% | 42,003 psi | 66% | 2920 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,682 psi | 61% | 2749 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,495 psi | 65% | 2818 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,303 psi | 57% | 2756 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,431 psi | 52% | 2707 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,575 psi | 49% | 2651 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,436 psi | 62% | 2917 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,339 psi | 71% | 2894 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 38,435 psi | 60% | 2753 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 47,572 psi | 75% | 2890 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,632 psi | 78% | 2887 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,181 psi | 74% | 2923 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,982 psi | 81% | 3074 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 50,937 psi | 80% | 2940 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,204 psi | 61% | 2753 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 88% | 45,672 psi | 72% | 2943 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 94% | 49,937 psi | 78% | 2976 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 46,267 psi | 73% | 2900 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,343 psi | 49% | 2589 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,409 psi | 66% | 2867 fps | 99.2% |
| Hodgdon Superformance | 70.6 gr | 92% | 47,819 psi | 75% | 3005 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 41% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,075 psi | 64% | 2779 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 42,221 psi | 66% | 2825 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,276 psi | 60% | 2703 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,716 psi | 72% | 2831 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 47,892 psi | 75% | 2920 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,311 psi | 73% | 2871 fps | 95.4% |
| IMR 4831 | <<locked>> | 90% | 36,071 psi | 57% | 2720 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 42,540 psi | 67% | 2848 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,892 psi | 75% | 2897 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 45,194 psi | 71% | 2867 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,658 psi | 72% | 2822 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,886 psi | 64% | 2769 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 40,582 psi | 64% | 2759 fps | 95.4% |
| Lovex S070 | <<locked>> | 90% | 43,787 psi | 69% | 2844 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 44,875 psi | 70% | 2838 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 45,223 psi | 71% | 2848 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,886 psi | 64% | 2802 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 36,492 psi | 57% | 2743 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 40,698 psi | 64% | 2818 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 43,540 psi | 68% | 2907 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,993 psi | 75% | 2904 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,500 psi | 74% | 2923 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,822 psi | 81% | 2949 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 42% | 1729 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,693 psi | 84% | 2986 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,337 psi | 66% | 2795 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,830 psi | 69% | 2927 fps | 98.3% |
| ReloadSwiss RS 60 | 58 gr | 80% | 35,592 psi | 56% | 2782 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,100 psi | 57% | 2759 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,653 psi | 61% | 2828 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 48,994 psi | 77% | 2887 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,888 psi | 67% | 2789 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 36,143 psi | 57% | 2690 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 47,572 psi | 75% | 2890 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,582 psi | 64% | 2759 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,194 psi | 71% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,886 psi | 64% | 2769 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 43,787 psi | 69% | 2844 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,086 psi | 58% | 2743 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,412 psi | 73% | 2877 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,324 psi | 69% | 2854 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,137 psi | 72% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,479 psi | 60% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,701 psi | 72% | 2815 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,199 psi | 82% | 2986 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,788 psi | 72% | 2789 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,137 psi | 72% | 2874 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,927 psi | 58% | 2697 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 28,703 psi | 45% | 2569 fps | 95.9% |
| Unknown powder | <<locked>> | 86% | 39,798 psi | 62% | 2808 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 50,995 psi | 80% | 2841 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,700 psi | 68% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,308 psi | 66% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,424 psi | 66% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,560 psi | 49% | 2543 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 84% | 37,275 psi | 58% | 2723 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 50,473 psi | 79% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,930 psi | 66% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,869 psi | 59% | 2769 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 34,098 psi | 53% | 2733 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,314 psi | 49% | 2549 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 51,895 psi | 81% | 3009 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,672 psi | 72% | 2943 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,836 psi | 50% | 2740 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 96 powders for .300 WSM loaded with the .308 | 150gr | Woodleigh HS. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,212 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 96 of the 96 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 150.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 150gr | Woodleigh HS 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.