Load Specifications
Load data in caliber .300 WSM with .308 | 150gr | RWS Kegelspitz bullet and 98 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 Reloder-17 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.
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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% | 57,217 psi | 90% | 2972 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,492 psi | 89% | 2999 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,376 psi | 88% | 3051 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,565 psi | 89% | 3002 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,642 psi | 68% | 2881 fps | 96.1% |
| Accurate 4064 | <<locked>> | 90% | 56,623 psi | 89% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,782 psi | 89% | 3140 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 56,463 psi | 88% | 3081 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,479 psi | 90% | 3077 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,347 psi | 87% | 3028 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,536 psi | 89% | 3002 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,536 psi | 89% | 3209 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,302 psi | 85% | 3051 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,694 psi | 86% | 3071 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3196 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,332 psi | 87% | 3179 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,307 psi | 65% | 2910 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 3087 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,434 psi | 88% | 3094 fps | 99.7% |
| Bofors RP3 | <<locked>> | 90% | 54,940 psi | 86% | 3068 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,839 psi | 86% | 3031 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,927 psi | 89% | 3012 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,071 psi | 86% | 3058 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,029 psi | 89% | 3166 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 55,259 psi | 87% | 3009 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,796 psi | 87% | 3077 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 57,450 psi | 90% | 3159 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 98% | 57,711 psi | 90% | 3117 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 57,029 psi | 89% | 3091 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3064 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,898 psi | 89% | 3127 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,376 psi | 88% | 3166 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 56% | 1896 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,232 psi | 90% | 3077 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,724 psi | 87% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,086 psi | 88% | 3048 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,564 psi | 87% | 3018 fps | 97.7% |
| IMR 4350 | <<locked>> | 98% | 55,317 psi | 87% | 3058 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,840 psi | 89% | 3068 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3025 fps | 99.1% |
| IMR 4895 | <<locked>> | 88% | 56,115 psi | 88% | 3104 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,347 psi | 87% | 3028 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,666 psi | 89% | 3058 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,869 psi | 88% | 3005 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 56,913 psi | 89% | 3058 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,275 psi | 88% | 3058 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 57,319 psi | 90% | 3097 fps | 98.2% |
| Norma 201 | <<locked>> | 86% | 55,216 psi | 87% | 3022 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,724 psi | 87% | 3025 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,479 psi | 90% | 3110 fps | 100% |
| Norma 204 | <<locked>> | 98% | 56,057 psi | 88% | 3110 fps | 96% |
| Norma URP | <<locked>> | 98% | 55,390 psi | 87% | 3120 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 54,708 psi | 86% | 3084 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 54,215 psi | 85% | 3114 fps | 98.3% |
| Ramshot TAC | <<locked>> | 84% | 55,608 psi | 87% | 3045 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,506 psi | 87% | 3068 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,217 psi | 88% | 3028 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 57% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,072 psi | 88% | 3058 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,361 psi | 87% | 3143 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,926 psi | 86% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 56,492 psi | 89% | 3159 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,869 psi | 88% | 3189 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 55,970 psi | 88% | 3005 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,767 psi | 87% | 3022 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,737 psi | 86% | 3054 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,839 psi | 86% | 3031 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,275 psi | 88% | 3058 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,666 psi | 89% | 3058 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,913 psi | 89% | 3058 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 57,319 psi | 90% | 3097 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,768 psi | 89% | 3123 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,186 psi | 85% | 3022 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,955 psi | 86% | 3048 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,507 psi | 89% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,913 psi | 89% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,608 psi | 89% | 3009 fps | 97.8% |
| Somchem S321 | <<locked>> | 82% | 56,710 psi | 89% | 3061 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,999 psi | 88% | 2956 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,537 psi | 90% | 3068 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,042 psi | 86% | 3054 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,635 psi | 84% | 3127 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 2989 fps | 95.9% |
| Unknown powder | <<locked>> | 96% | 56,594 psi | 89% | 3133 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 82% | 54,984 psi | 86% | 2904 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,275 psi | 88% | 2940 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,434 psi | 87% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,492 psi | 87% | 2992 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,536 psi | 89% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,276 psi | 90% | 3104 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,911 psi | 86% | 3031 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,317 psi | 87% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,334 psi | 90% | 3150 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,730 psi | 72% | 2992 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,592 psi | 86% | 3038 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,623 psi | 89% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,450 psi | 90% | 3159 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,202 psi | 58% | 2913 fps | 98.9% |
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% | 50,517 psi | 79% | 2874 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,511 psi | 68% | 2795 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,095 psi | 77% | 2940 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,501 psi | 78% | 2884 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 40,756 psi | 64% | 2822 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 41,147 psi | 64% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,780 psi | 55% | 2710 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 46,760 psi | 73% | 2913 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 39,668 psi | 62% | 2746 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,805 psi | 76% | 2920 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 49,371 psi | 77% | 2904 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,815 psi | 67% | 2943 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,581 psi | 62% | 2772 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,438 psi | 67% | 2841 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,867 psi | 55% | 2723 fps | 95.2% |
| Alliant Reloder-17 | 59.1 gr | 80% | 34,142 psi | 54% | 2733 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,169 psi | 50% | 2674 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,608 psi | 59% | 2874 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,180 psi | 72% | 2913 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 39,334 psi | 62% | 2776 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 48,559 psi | 76% | 2920 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,314 psi | 79% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,080 psi | 75% | 2943 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,229 psi | 83% | 3104 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 51,779 psi | 81% | 2956 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,059 psi | 63% | 2779 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 86% | 43,526 psi | 68% | 2904 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 50,894 psi | 80% | 2999 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 47,224 psi | 74% | 2923 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,023 psi | 47% | 2556 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,770 psi | 64% | 2838 fps | 99% |
| Hodgdon Superformance | <<locked>> | 92% | 48,820 psi | 77% | 3031 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 42% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,829 psi | 66% | 2802 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 43,134 psi | 68% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,001 psi | 61% | 2726 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,325 psi | 73% | 2851 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 48,820 psi | 77% | 2943 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,396 psi | 70% | 2838 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 34,650 psi | 54% | 2687 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 43,453 psi | 68% | 2874 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 48,805 psi | 76% | 2920 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 46,209 psi | 72% | 2890 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,557 psi | 73% | 2844 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 41,800 psi | 66% | 2792 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 38,856 psi | 61% | 2726 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 44,556 psi | 70% | 2867 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 45,861 psi | 72% | 2864 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 46,209 psi | 72% | 2871 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,800 psi | 66% | 2828 fps | 98.5% |
| Norma 204 | <<locked>> | 96% | 52,504 psi | 82% | 3048 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 35,099 psi | 55% | 2713 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 41,539 psi | 65% | 2841 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 41,640 psi | 65% | 2871 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 48,820 psi | 77% | 2927 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,356 psi | 76% | 2946 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,678 psi | 83% | 2972 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 42% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,149 psi | 68% | 2822 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,889 psi | 70% | 2953 fps | 98.6% |
| ReloadSwiss RS 60 | 59.1 gr | 80% | 36,347 psi | 57% | 2805 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 37,043 psi | 58% | 2785 fps | 95.6% |
| ReloadSwiss RS 70 | 66.1 gr | 88% | 39,595 psi | 62% | 2861 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 49,835 psi | 78% | 2907 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,627 psi | 68% | 2808 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,057 psi | 58% | 2717 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 48,559 psi | 76% | 2920 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,856 psi | 61% | 2726 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,209 psi | 72% | 2890 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,800 psi | 66% | 2792 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 44,556 psi | 70% | 2867 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,884 psi | 59% | 2766 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,239 psi | 74% | 2900 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,194 psi | 71% | 2874 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,920 psi | 74% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,189 psi | 61% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,685 psi | 68% | 2779 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 53,069 psi | 83% | 3005 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,717 psi | 73% | 2812 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,007 psi | 74% | 2897 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 37,811 psi | 59% | 2723 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 27,514 psi | 43% | 2536 fps | 95.4% |
| Somchem S385 | <<locked>> | 98% | 46,499 psi | 73% | 2930 fps | 95% |
| Unknown powder | <<locked>> | 84% | 38,014 psi | 60% | 2772 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 51,837 psi | 81% | 2858 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,280 psi | 69% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,120 psi | 68% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,163 psi | 68% | 2789 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,227 psi | 51% | 2566 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 82% | 35,621 psi | 56% | 2690 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 51,488 psi | 81% | 2979 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,815 psi | 67% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 36,071 psi | 57% | 2730 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 32,750 psi | 51% | 2697 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,850 psi | 50% | 2569 fps | 96.1% |
| Winchester 748 | <<locked>> | 80% | 52,881 psi | 83% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 43,526 psi | 68% | 2904 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,501 psi | 48% | 2700 fps | 95.5% |
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 | RWS Kegelspitz. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,209 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 56–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:6.0 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for .300 WSM with the .308 | 150gr | RWS Kegelspitz 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.