Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 155.5gr | Warner Tool Co. Flat Line bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-26.
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% | 57,363 psi | 90% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,056 psi | 86% | 2995 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 3035 fps | 99% |
| Accurate 4064 | <<locked>> | 84% | 54,128 psi | 85% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,969 psi | 86% | 3097 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 56,652 psi | 89% | 3074 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,273 psi | 85% | 3022 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,028 psi | 88% | 3136 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,421 psi | 90% | 3209 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,057 psi | 88% | 3130 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,042 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,419 psi | 87% | 3071 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,564 psi | 87% | 3153 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,869 psi | 89% | 3179 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,259 psi | 87% | 3120 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,330 psi | 82% | 3114 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,327 psi | 77% | 3051 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,033 psi | 67% | 2956 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3261 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,695 psi | 89% | 3087 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 56,043 psi | 88% | 3064 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,330 psi | 82% | 3114 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 55,434 psi | 87% | 3041 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 86% | 56,391 psi | 88% | 3077 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 57,043 psi | 89% | 3146 fps | 99% |
| Hodgdon H4350 | <<locked>> | 90% | 56,985 psi | 89% | 3104 fps | 98% |
| Hodgdon H4895 | <<locked>> | 82% | 57,305 psi | 90% | 3081 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,782 psi | 87% | 3071 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,696 psi | 90% | 3120 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,653 psi | 90% | 3186 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 57% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,795 psi | 86% | 3028 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,159 psi | 90% | 3058 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,478 psi | 89% | 3038 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 56,275 psi | 88% | 3074 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,956 psi | 89% | 3071 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 55,158 psi | 86% | 3081 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,884 psi | 89% | 3100 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 57,043 psi | 89% | 3041 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,347 psi | 87% | 2989 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,508 psi | 90% | 3051 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,130 psi | 90% | 3071 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 54,998 psi | 86% | 3054 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,758 psi | 69% | 2867 fps | 97.4% |
| Norma 201 | <<locked>> | 82% | 55,405 psi | 87% | 3012 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,970 psi | 88% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,708 psi | 86% | 3054 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,116 psi | 90% | 3127 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3205 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 57,101 psi | 89% | 3133 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,463 psi | 87% | 3081 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,927 psi | 88% | 3130 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,730 psi | 72% | 2963 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,478 psi | 89% | 3061 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,347 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,478 psi | 89% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,679 psi | 86% | 3114 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,261 psi | 90% | 3205 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 56,028 psi | 88% | 3015 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,144 psi | 88% | 3061 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,711 psi | 90% | 3104 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 98% | 54,375 psi | 85% | 3104 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 55,434 psi | 87% | 3041 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,130 psi | 90% | 3071 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,043 psi | 89% | 3041 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,508 psi | 90% | 3051 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,998 psi | 86% | 3054 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,940 psi | 85% | 3061 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,114 psi | 86% | 3038 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,188 psi | 88% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,985 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,942 psi | 89% | 3018 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3159 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 55,898 psi | 88% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,711 psi | 90% | 3061 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,941 psi | 88% | 3054 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,434 psi | 88% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,027 psi | 86% | 3077 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 56,695 psi | 89% | 2923 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,347 psi | 88% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,536 psi | 89% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,334 psi | 90% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,854 psi | 88% | 3074 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2992 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,839 psi | 86% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,810 psi | 86% | 3077 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3136 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3196 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,564 psi | 87% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,276 psi | 90% | 3150 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,643 psi | 70% | 3100 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,259 psi | 87% | 3048 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 3074 fps | 97.4% |
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 2495 | <<locked>> | 80% | 50,328 psi | 79% | 2884 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,225 psi | 76% | 2874 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 37,391 psi | 59% | 2733 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,645 psi | 75% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,158 psi | 57% | 2723 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 80% | 53,142 psi | 83% | 3015 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,223 psi | 71% | 2858 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 46,006 psi | 72% | 2946 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,676 psi | 78% | 3077 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 46,108 psi | 72% | 2946 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,600 psi | 71% | 2884 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,660 psi | 76% | 2953 fps | 99.7% |
| Alliant Reloder-16 | 61.4 gr | 80% | 35,462 psi | 56% | 2736 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,118 psi | 63% | 2874 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,542 psi | 71% | 2936 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,745 psi | 72% | 2986 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,673 psi | 43% | 2526 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,563 psi | 56% | 2766 fps | 95.2% |
| Alliant Reloder-26 | 72.8 gr | 86% | 34,069 psi | 53% | 2772 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,982 psi | 83% | 3028 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,847 psi | 72% | 2890 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 45,745 psi | 72% | 2986 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 43,105 psi | 68% | 2808 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,282 psi | 73% | 2900 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 40,959 psi | 64% | 2838 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 43,976 psi | 69% | 2861 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 53,708 psi | 84% | 3025 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,996 psi | 52% | 2628 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,343 psi | 79% | 3002 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,917 psi | 67% | 2910 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 42% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,343 psi | 80% | 2972 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,558 psi | 75% | 2894 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,734 psi | 78% | 2920 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 43,830 psi | 69% | 2844 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,916 psi | 66% | 2785 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 34,867 psi | 55% | 2674 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 49,908 psi | 78% | 2982 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 53,388 psi | 84% | 2989 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,127 psi | 82% | 2936 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,732 psi | 75% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,320 psi | 62% | 2730 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 40,132 psi | 63% | 2762 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 38,392 psi | 60% | 2756 fps | 95.9% |
| Norma 201 | <<locked>> | 80% | 51,895 psi | 81% | 2956 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,620 psi | 82% | 2959 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,008 psi | 75% | 2940 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 46,717 psi | 73% | 2940 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 42,090 psi | 66% | 2940 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,056 psi | 56% | 2720 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,298 psi | 76% | 2959 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 37,478 psi | 59% | 2762 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 42,612 psi | 67% | 2894 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 43% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,224 psi | 72% | 2881 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,605 psi | 82% | 3081 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,627 psi | 67% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,882 psi | 56% | 2740 fps | 96.4% |
| ReloadSwiss RS 70 | 67.1 gr | 80% | 35,056 psi | 55% | 2740 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,429 psi | 77% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,062 psi | 67% | 2831 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 50,792 psi | 80% | 2982 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 44,440 psi | 70% | 2917 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 43,105 psi | 68% | 2808 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,320 psi | 62% | 2730 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,388 psi | 84% | 2989 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,732 psi | 75% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,132 psi | 63% | 2762 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,309 psi | 69% | 2890 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,721 psi | 81% | 2986 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,823 psi | 83% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,570 psi | 70% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,147 psi | 64% | 2726 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,181 psi | 74% | 2972 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 52,475 psi | 82% | 2887 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,882 psi | 84% | 3002 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,439 psi | 68% | 2831 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 32,590 psi | 51% | 2674 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 42,424 psi | 66% | 2841 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 53,316 psi | 84% | 2877 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,676 psi | 78% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,821 psi | 78% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,495 psi | 65% | 2759 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,478 psi | 59% | 2723 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 44,469 psi | 70% | 2871 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 48,269 psi | 76% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,999 psi | 58% | 2723 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 30,342 psi | 48% | 2605 fps | 95.2% |
| Vihtavuori N560 | <<locked>> | 98% | 52,243 psi | 82% | 3123 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,753 psi | 58% | 2694 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 40,959 psi | 64% | 2838 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,818 psi | 44% | 2612 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,605 psi | 81% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,993 psi | 75% | 2943 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 94 powders for .300 Weath. Mag. loaded with the .308 | 155.5gr | Warner Tool Co. Flat Line. Alliant Reloder-26 delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,261 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 (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.5 gr projectile in 0.308" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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 Reloder-16, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 155.5gr | Warner Tool Co. Flat Line 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.