Load Specifications
Load data in caliber .300 WSM with .308 | 150gr | Impala LW CFN bullet and 95 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>> | 82% | 54,969 psi | 86% | 2904 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,926 psi | 86% | 2940 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,334 psi | 90% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,826 psi | 89% | 2969 fps | 96.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,686 psi | 70% | 2867 fps | 95.9% |
| Accurate 4064 | <<locked>> | 88% | 54,694 psi | 86% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 57,276 psi | 90% | 3114 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 57,087 psi | 89% | 3054 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 54,462 psi | 85% | 2995 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,666 psi | 87% | 2999 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,898 psi | 89% | 2979 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,275 psi | 88% | 3173 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,969 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,347 psi | 87% | 3045 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3163 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,361 psi | 87% | 3146 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,206 psi | 66% | 2894 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,108 psi | 74% | 3061 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,565 psi | 89% | 3064 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 55,898 psi | 88% | 3045 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,637 psi | 87% | 3005 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,406 psi | 90% | 2982 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,608 psi | 87% | 3035 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,072 psi | 89% | 3130 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 55,695 psi | 87% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,333 psi | 88% | 3051 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 94% | 57,232 psi | 90% | 3123 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 86% | 57,667 psi | 90% | 3068 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,795 psi | 84% | 3031 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,840 psi | 89% | 3094 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,231 psi | 88% | 3130 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 56% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,348 psi | 90% | 3048 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,188 psi | 88% | 3028 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,594 psi | 89% | 3022 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,898 psi | 88% | 2986 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 55,361 psi | 87% | 3022 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,029 psi | 89% | 3035 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 2999 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 56,652 psi | 89% | 3077 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 55,666 psi | 87% | 2999 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,334 psi | 90% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,159 psi | 88% | 2972 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 57,638 psi | 90% | 3035 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,000 psi | 89% | 3035 fps | 98.6% |
| Lovex S070 | <<locked>> | 96% | 54,636 psi | 86% | 3015 fps | 97.4% |
| Norma 201 | <<locked>> | 86% | 56,202 psi | 88% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,333 psi | 88% | 2999 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,636 psi | 86% | 3035 fps | 99.8% |
| Norma URP | <<locked>> | 98% | 55,709 psi | 87% | 3094 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 54,723 psi | 86% | 3051 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 54,230 psi | 85% | 3081 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 56,014 psi | 88% | 3015 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,796 psi | 87% | 3038 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,652 psi | 89% | 2999 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,579 psi | 89% | 3031 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,521 psi | 87% | 3110 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,013 psi | 86% | 3146 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 56,376 psi | 88% | 3130 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,854 psi | 88% | 3153 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 57,580 psi | 90% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,753 psi | 89% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,738 psi | 87% | 3035 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,637 psi | 87% | 3005 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,000 psi | 89% | 3035 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,334 psi | 90% | 3035 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 57,638 psi | 90% | 3035 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,636 psi | 86% | 3015 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,782 psi | 89% | 3091 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,926 psi | 86% | 2995 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,172 psi | 86% | 3018 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,029 psi | 89% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,188 psi | 90% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,203 psi | 90% | 2982 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 57,377 psi | 90% | 3035 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,782 psi | 89% | 2933 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,725 psi | 90% | 3038 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 55,709 psi | 87% | 3031 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,766 psi | 84% | 3100 fps | 100% |
| Unknown powder | <<locked>> | 96% | 56,333 psi | 88% | 3097 fps | 99% |
| Vihtavuori N130 | <<locked>> | 82% | 55,695 psi | 87% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,550 psi | 89% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,318 psi | 88% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,115 psi | 88% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,971 psi | 89% | 3009 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,232 psi | 90% | 3068 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 82% | 55,521 psi | 87% | 3005 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,695 psi | 87% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,508 psi | 90% | 3120 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2979 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,505 psi | 85% | 3005 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,000 psi | 89% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,232 psi | 90% | 3123 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,174 psi | 60% | 2900 fps | 98.7% |
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% | 51,721 psi | 81% | 2858 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,905 psi | 72% | 2799 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,444 psi | 79% | 2927 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,343 psi | 79% | 2861 fps | 95.2% |
| Accurate 3100 | <<locked>> | 98% | 41,989 psi | 66% | 2815 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,265 psi | 68% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 36,361 psi | 57% | 2710 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 47,747 psi | 75% | 2894 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 40,625 psi | 64% | 2730 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,617 psi | 78% | 2897 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 50,212 psi | 79% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,279 psi | 68% | 2917 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,727 psi | 64% | 2762 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,555 psi | 68% | 2828 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,911 psi | 56% | 2713 fps | 95.1% |
| Alliant Reloder-17 | 56.1 gr | 80% | 35,404 psi | 55% | 2730 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,589 psi | 50% | 2618 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 38,624 psi | 61% | 2864 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,644 psi | 73% | 2890 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 40,828 psi | 64% | 2772 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 49,255 psi | 77% | 2894 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,937 psi | 80% | 2881 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,791 psi | 76% | 2923 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,432 psi | 84% | 3071 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 52,446 psi | 82% | 2933 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,350 psi | 65% | 2769 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 88% | 47,152 psi | 74% | 2946 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 48,153 psi | 75% | 2904 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,401 psi | 49% | 2559 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,611 psi | 65% | 2822 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 92% | 49,182 psi | 77% | 3005 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,714 psi | 67% | 2785 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 44,179 psi | 69% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,030 psi | 63% | 2710 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,036 psi | 74% | 2825 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 49,226 psi | 77% | 2917 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 47,761 psi | 75% | 2867 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 35,911 psi | 56% | 2684 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 44,541 psi | 70% | 2861 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 49,617 psi | 78% | 2897 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 47,485 psi | 74% | 2877 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,195 psi | 74% | 2818 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 43,047 psi | 67% | 2779 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 40,190 psi | 63% | 2717 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 45,745 psi | 72% | 2854 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,181 psi | 74% | 2848 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 47,181 psi | 74% | 2851 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,960 psi | 67% | 2815 fps | 98.4% |
| Norma URP | <<locked>> | 84% | 36,158 psi | 57% | 2703 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 42,177 psi | 66% | 2822 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 42,395 psi | 66% | 2851 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 49,342 psi | 77% | 2900 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,052 psi | 77% | 2923 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,345 psi | 84% | 2946 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,106 psi | 69% | 2802 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,643 psi | 72% | 2936 fps | 98.4% |
| ReloadSwiss RS 60 | 56.1 gr | 80% | 37,463 psi | 59% | 2799 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 38,159 psi | 60% | 2779 fps | 95.5% |
| ReloadSwiss RS 70 | 62.6 gr | 88% | 40,306 psi | 63% | 2838 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 51,503 psi | 81% | 2890 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,962 psi | 70% | 2795 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 38,682 psi | 61% | 2717 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 49,255 psi | 77% | 2894 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,190 psi | 63% | 2717 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,485 psi | 74% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,047 psi | 67% | 2779 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 45,745 psi | 72% | 2854 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,943 psi | 61% | 2756 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,167 psi | 75% | 2877 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,977 psi | 72% | 2858 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,008 psi | 75% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,321 psi | 63% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 47,572 psi | 75% | 2818 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 53,693 psi | 84% | 2982 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,805 psi | 75% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,572 psi | 75% | 2871 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 39,146 psi | 61% | 2720 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 29,109 psi | 46% | 2549 fps | 95.8% |
| Unknown powder | <<locked>> | 84% | 38,943 psi | 61% | 2759 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 52,721 psi | 83% | 2838 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,107 psi | 71% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,512 psi | 70% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,048 psi | 69% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,634 psi | 53% | 2566 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 82% | 36,651 psi | 57% | 2677 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 52,025 psi | 82% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,758 psi | 69% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 37,376 psi | 59% | 2730 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 90% | 34,258 psi | 54% | 2707 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,982 psi | 52% | 2566 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 53,185 psi | 83% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 47,152 psi | 74% | 2946 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 31,995 psi | 50% | 2707 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 114 powders for .300 WSM loaded with the .308 | 150gr | Impala LW CFN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,173 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 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 1:13.0 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 | Impala LW CFN 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.