Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 150gr | Hornady BTSP bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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.
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 2495 | <<locked>> | 84% | 54,128 psi | 87% | 2976 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,825 psi | 90% | 3028 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,834 psi | 78% | 2992 fps | 97.9% |
| Accurate 4064 | <<locked>> | 86% | 54,447 psi | 87% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,897 psi | 88% | 3123 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 53,867 psi | 86% | 3054 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,027 psi | 88% | 3061 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,115 psi | 90% | 3156 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,057 psi | 90% | 3058 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,693 psi | 86% | 3176 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,941 psi | 90% | 3153 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,405 psi | 89% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,796 psi | 89% | 3104 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,608 psi | 89% | 3186 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,258 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,114 psi | 88% | 3140 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,977 psi | 74% | 3018 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,248 psi | 65% | 2907 fps | 96.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,504 psi | 84% | 3212 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,621 psi | 86% | 3068 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 56,217 psi | 90% | 3100 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 55,970 psi | 90% | 3074 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,869 psi | 90% | 3084 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 53,214 psi | 85% | 3054 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 53,650 psi | 86% | 3114 fps | 98% |
| Hodgdon H4350 | <<locked>> | 90% | 53,780 psi | 86% | 3074 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 54,433 psi | 87% | 3068 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,869 psi | 90% | 3104 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,302 psi | 87% | 3100 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,722 psi | 86% | 3146 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1932 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,477 psi | 89% | 3068 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,853 psi | 88% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,447 psi | 87% | 3041 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,824 psi | 86% | 3015 fps | 97.9% |
| IMR 4350 | <<locked>> | 94% | 53,214 psi | 85% | 3045 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,157 psi | 87% | 3048 fps | 97.9% |
| IMR 4831 | <<locked>> | 96% | 55,230 psi | 89% | 3110 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 53,751 psi | 86% | 3081 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 56,057 psi | 90% | 3058 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,041 psi | 87% | 3028 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,115 psi | 90% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,418 psi | 87% | 3035 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,940 psi | 86% | 3041 fps | 98.9% |
| Lovex S070 | <<locked>> | 94% | 55,187 psi | 88% | 3081 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 55,970 psi | 90% | 3051 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,069 psi | 85% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,085 psi | 88% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,751 psi | 86% | 3091 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 51,648 psi | 83% | 3163 fps | 97.6% |
| Norma URP | <<locked>> | 94% | 53,664 psi | 86% | 3107 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 55,970 psi | 90% | 3117 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 56,173 psi | 90% | 3163 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 56,101 psi | 90% | 3074 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,115 psi | 90% | 3094 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,316 psi | 85% | 3035 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 52,924 psi | 85% | 3117 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 52,823 psi | 85% | 3156 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,679 psi | 88% | 3143 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,447 psi | 86% | 3169 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 84% | 53,214 psi | 85% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,318 psi | 90% | 3094 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,186 psi | 87% | 3123 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 92% | 55,970 psi | 90% | 3074 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,940 psi | 86% | 3041 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,041 psi | 87% | 3028 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,418 psi | 87% | 3035 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,187 psi | 88% | 3081 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,346 psi | 87% | 3097 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,940 psi | 88% | 3054 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,825 psi | 90% | 3077 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,592 psi | 86% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,317 psi | 87% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,882 psi | 86% | 2989 fps | 97.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 3117 fps | 96.6% |
| Somchem S335 | <<locked>> | 82% | 53,229 psi | 85% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,607 psi | 88% | 3041 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,173 psi | 90% | 3087 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,043 psi | 90% | 3166 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,158 psi | 88% | 3104 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 82% | 54,056 psi | 87% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,214 psi | 85% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,751 psi | 86% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,230 psi | 87% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,014 psi | 90% | 3104 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 56,391 psi | 90% | 3051 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,419 psi | 89% | 3022 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,998 psi | 88% | 3104 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,242 psi | 82% | 3100 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,854 psi | 90% | 3074 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,882 psi | 86% | 3120 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,379 psi | 66% | 3048 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,738 psi | 89% | 3084 fps | 100% |
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 2495 | <<locked>> | 80% | 47,471 psi | 76% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,876 psi | 74% | 2851 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 39,755 psi | 64% | 2808 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 44,904 psi | 72% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,620 psi | 54% | 2684 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 50,343 psi | 81% | 2995 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 42,931 psi | 69% | 2835 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 96% | 49,226 psi | 79% | 3031 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,446 psi | 84% | 2999 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,702 psi | 75% | 3045 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 49,197 psi | 79% | 3028 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,105 psi | 69% | 2861 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,948 psi | 74% | 2930 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,431 psi | 54% | 2700 fps | 95.3% |
| Alliant Reloder-17 | 63.7 gr | 80% | 37,521 psi | 60% | 2835 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 96% | 48,544 psi | 78% | 3022 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,414 psi | 47% | 2602 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 37,797 psi | 61% | 2844 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,521 psi | 59% | 2861 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,212 psi | 81% | 3005 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 43,076 psi | 69% | 2867 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 46,311 psi | 74% | 2897 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,199 psi | 84% | 3025 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,729 psi | 70% | 2874 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 43,859 psi | 70% | 2927 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 47,224 psi | 76% | 2953 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 50,908 psi | 82% | 3005 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,893 psi | 50% | 2592 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,326 psi | 76% | 2979 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 43,323 psi | 69% | 2940 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 43% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,704 psi | 78% | 2953 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 51,271 psi | 82% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,121 psi | 72% | 2874 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,340 psi | 76% | 2897 fps | 96.6% |
| IMR 4350 | <<locked>> | 88% | 44,092 psi | 71% | 2871 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,279 psi | 68% | 2815 fps | 95.1% |
| IMR 4831 | <<locked>> | 82% | 34,911 psi | 56% | 2703 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,123 psi | 76% | 2963 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 52,446 psi | 84% | 2999 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,415 psi | 81% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,763 psi | 80% | 2923 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 45,179 psi | 72% | 2874 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 37,188 psi | 60% | 2700 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 42,946 psi | 69% | 2851 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,342 psi | 79% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,995 psi | 80% | 2946 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,324 psi | 73% | 2913 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 50,111 psi | 80% | 3028 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 45,078 psi | 72% | 3028 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 33,765 psi | 54% | 2687 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 45,455 psi | 73% | 2936 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 40,089 psi | 64% | 2851 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 52,620 psi | 84% | 3015 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,504 psi | 84% | 3031 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 44% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,874 psi | 70% | 2854 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,298 psi | 79% | 3051 fps | 99.5% |
| ReloadSwiss RS 60 | 63.7 gr | 80% | 39,885 psi | 64% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 35,781 psi | 57% | 2762 fps | 95.7% |
| ReloadSwiss RS 70 | 67.9 gr | 84% | 37,724 psi | 60% | 2831 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 47,065 psi | 75% | 2890 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 40,567 psi | 65% | 2808 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 96% | 47,384 psi | 76% | 2999 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 46,311 psi | 74% | 2897 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,188 psi | 60% | 2700 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,415 psi | 81% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,179 psi | 72% | 2874 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 42,946 psi | 69% | 2851 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,524 psi | 67% | 2861 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,372 psi | 82% | 2992 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,907 psi | 78% | 2963 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,227 psi | 81% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,235 psi | 68% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,539 psi | 67% | 2756 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 50,154 psi | 80% | 3054 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 50,024 psi | 80% | 2881 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,097 psi | 82% | 2986 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 41,046 psi | 66% | 2812 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 30,327 psi | 49% | 2635 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 45,049 psi | 72% | 2920 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 50,705 psi | 81% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,862 psi | 75% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,355 psi | 76% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,189 psi | 63% | 2740 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 35,085 psi | 56% | 2690 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 52,866 psi | 85% | 2999 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,774 psi | 73% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,737 psi | 56% | 2690 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 86% | 32,111 psi | 51% | 2684 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,693 psi | 56% | 2664 fps | 97.9% |
| Winchester 760 | <<locked>> | 86% | 44,063 psi | 71% | 2930 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,704 psi | 48% | 2690 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,718 psi | 78% | 2966 fps | 99.9% |
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 94 powders for .300 Win. Mag. loaded with the .308 | 150gr | Hornady BTSP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,212 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 Win. Mag. with the .308 | 150gr | Hornady BTSP 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.