Load Specifications
Load data in caliber .300 WSM with .308 | 130gr | Barnes TSX BT bullet and 95 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, ReloadSwiss RS 60 and ReloadSwiss RS 52.
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>> | 88% | 56,913 psi | 89% | 3176 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,390 psi | 87% | 3199 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,491 psi | 85% | 3182 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,653 psi | 90% | 3268 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,549 psi | 85% | 3232 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 3235 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 82% | 55,898 psi | 88% | 3117 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,289 psi | 88% | 3146 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,072 psi | 88% | 3271 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 96% | 57,421 psi | 90% | 3268 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 57,305 psi | 90% | 3251 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,187 psi | 86% | 3225 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 88% | 55,390 psi | 87% | 3209 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 57,072 psi | 89% | 3350 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,072 psi | 88% | 3392 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,768 psi | 89% | 3291 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,333 psi | 88% | 3186 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,595 psi | 90% | 3314 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3241 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,447 psi | 85% | 3356 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,463 psi | 87% | 3107 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,333 psi | 88% | 3284 fps | 98.8% |
| Bofors RP3 | <<locked>> | 96% | 57,435 psi | 90% | 3304 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,261 psi | 90% | 3212 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,404 psi | 85% | 3248 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,739 psi | 89% | 3363 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 84% | 55,956 psi | 88% | 3232 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 57,348 psi | 90% | 3255 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,288 psi | 87% | 3258 fps | 98.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3291 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 90% | 56,579 psi | 89% | 3284 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,643 psi | 72% | 3104 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,086 psi | 88% | 3317 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,751 psi | 54% | 2014 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,592 psi | 86% | 3232 fps | 99.5% |
| IMR 3031 | <<locked>> | 90% | 56,173 psi | 88% | 3274 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,681 psi | 89% | 3251 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,348 psi | 90% | 3225 fps | 96.3% |
| IMR 4198 | <<locked>> | 84% | 56,652 psi | 89% | 3146 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,652 psi | 89% | 3245 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3169 fps | 97.5% |
| IMR 4895 | <<locked>> | 92% | 55,361 psi | 87% | 3291 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 55,187 psi | 86% | 3225 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 55,303 psi | 87% | 3205 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,463 psi | 87% | 3245 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,956 psi | 88% | 3199 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 56,014 psi | 88% | 3245 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 3228 fps | 97.4% |
| Norma 201 | <<locked>> | 90% | 54,737 psi | 86% | 3215 fps | 99.8% |
| Norma 202 | <<locked>> | 90% | 55,216 psi | 87% | 3222 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,695 psi | 89% | 3297 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 50,531 psi | 79% | 3228 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 92% | 53,867 psi | 84% | 3264 fps | 99.1% |
| Ramshot TAC | <<locked>> | 88% | 55,898 psi | 88% | 3235 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,201 psi | 87% | 3258 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,608 psi | 89% | 3225 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,925 psi | 55% | 2060 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,839 psi | 86% | 3209 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,883 psi | 88% | 3235 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,317 psi | 85% | 3327 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,128 psi | 85% | 3363 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 3255 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,517 psi | 81% | 3281 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,376 psi | 87% | 3202 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,984 psi | 86% | 3209 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 98% | 57,261 psi | 90% | 3294 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,477 psi | 87% | 3228 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,463 psi | 87% | 3245 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,014 psi | 88% | 3245 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,592 psi | 86% | 3173 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,738 psi | 87% | 3304 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,667 psi | 90% | 3215 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,012 psi | 85% | 3202 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,737 psi | 86% | 3238 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,608 psi | 89% | 3159 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,797 psi | 89% | 3153 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3179 fps | 96.1% |
| Somchem S321 | <<locked>> | 86% | 56,753 psi | 89% | 3261 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,825 psi | 87% | 3156 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,508 psi | 90% | 3261 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 57,551 psi | 90% | 3291 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,846 psi | 70% | 3163 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 86% | 56,347 psi | 88% | 3130 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,681 psi | 89% | 3146 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,389 psi | 85% | 3179 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,811 psi | 87% | 3196 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,869 psi | 88% | 3215 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,098 psi | 83% | 3228 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 88% | 55,912 psi | 88% | 3225 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 54,099 psi | 85% | 3189 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3228 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3215 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 55,564 psi | 87% | 3274 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 3297 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,418 psi | 85% | 3245 fps | 99.6% |
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% | 43,903 psi | 69% | 2963 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,254 psi | 76% | 3081 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,245 psi | 57% | 2851 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,337 psi | 68% | 3018 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 34,258 psi | 54% | 2825 fps | 98.7% |
| Accurate 4350 | <<locked>> | 94% | 40,814 psi | 64% | 3031 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 52,591 psi | 82% | 3068 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,997 psi | 83% | 3094 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,611 psi | 64% | 2966 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 39,146 psi | 61% | 2907 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 53,592 psi | 84% | 3196 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,743 psi | 67% | 2989 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 42,076 psi | 66% | 2992 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,777 psi | 78% | 3219 fps | 99% |
| Alliant Power Pro 2000-MR | 62.4 gr | 84% | 42,366 psi | 66% | 3110 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,750 psi | 53% | 2808 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,748 psi | 78% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,957 psi | 61% | 2943 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,031 psi | 64% | 3048 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,810 psi | 56% | 2940 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,996 psi | 81% | 3054 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,740 psi | 62% | 2956 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 33,011 psi | 52% | 2799 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,570 psi | 70% | 2982 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,133 psi | 64% | 2995 fps | 98.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,426 psi | 71% | 3153 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 48,863 psi | 77% | 3114 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,893 psi | 78% | 3133 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,076 psi | 66% | 3002 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 98% | 50,821 psi | 80% | 3228 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 40,973 psi | 64% | 2979 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,070 psi | 55% | 2861 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,970 psi | 58% | 2930 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 40% | 1804 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,421 psi | 62% | 2927 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 40,118 psi | 63% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 38,624 psi | 61% | 2890 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,766 psi | 84% | 3166 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 50,241 psi | 79% | 3048 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,098 psi | 83% | 3182 fps | 95.3% |
| IMR 4831 | <<locked>> | 94% | 39,392 psi | 62% | 2976 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 37,289 psi | 58% | 2913 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 42,743 psi | 67% | 2989 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 47,993 psi | 75% | 3081 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 39,218 psi | 61% | 2940 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 41,162 psi | 65% | 2910 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 35,897 psi | 56% | 2838 fps | 96.7% |
| Lovex S065 | <<locked>> | 94% | 45,847 psi | 72% | 3051 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 39,668 psi | 62% | 2917 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 39,929 psi | 63% | 2936 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 35,766 psi | 56% | 2864 fps | 95% |
| Norma URP | <<locked>> | 94% | 41,147 psi | 64% | 3035 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 37,898 psi | 59% | 2936 fps | 95.6% |
| Ramshot TAC | <<locked>> | 82% | 45,658 psi | 72% | 3038 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,989 psi | 66% | 2999 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,267 psi | 73% | 3038 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,976 psi | 41% | 1847 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,109 psi | 75% | 3091 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,892 psi | 77% | 3110 fps | 95.1% |
| ReloadSwiss RS 52 | 57.6 gr | 80% | 37,797 psi | 59% | 2982 fps | 95% |
| ReloadSwiss RS 60 | 58.5 gr | 80% | 31,053 psi | 49% | 2812 fps | 95.8% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 43,888 psi | 69% | 3117 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,686 psi | 70% | 3136 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 43,265 psi | 68% | 2979 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 37,637 psi | 59% | 2861 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 35,476 psi | 56% | 2858 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,847 psi | 72% | 3051 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,218 psi | 61% | 2940 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 35,897 psi | 56% | 2838 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,879 psi | 80% | 3110 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,072 psi | 58% | 2923 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,604 psi | 79% | 3107 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,613 psi | 68% | 3002 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,233 psi | 61% | 2927 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,162 psi | 65% | 2887 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,910 psi | 53% | 2726 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,736 psi | 83% | 3120 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 46,079 psi | 72% | 3074 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 40,828 psi | 64% | 2887 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 40,466 psi | 63% | 2943 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 34,214 psi | 54% | 2808 fps | 95% |
| Somchem S365 | <<locked>> | 90% | 32,039 psi | 50% | 2838 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 46,688 psi | 73% | 2976 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,437 psi | 65% | 2890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,709 psi | 58% | 2858 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,782 psi | 59% | 2861 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 30,472 psi | 48% | 2684 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 94% | 43,265 psi | 68% | 3038 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 42,714 psi | 67% | 2979 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,332 psi | 57% | 2841 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 94% | 42,656 psi | 67% | 3041 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,882 psi | 56% | 2835 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,047 psi | 66% | 3025 fps | 98.9% |
| Winchester 760 | <<locked>> | 98% | 51,068 psi | 80% | 3232 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,479 psi | 60% | 2923 fps | 96.7% |
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 95 powders for .300 WSM loaded with the .308 | 130gr | Barnes TSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,392 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,392 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon H414 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, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for .300 WSM with the .308 | 130gr | Barnes TSX BT 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.