Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 150gr | Fox Classic Hunter 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-17, ReloadSwiss RS 60 and Winchester 760.
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>> | 84% | 55,767 psi | 89% | 2936 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,375 psi | 87% | 2956 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,591 psi | 84% | 2969 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,737 psi | 86% | 2949 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 54,360 psi | 87% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,708 psi | 88% | 3087 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 55,056 psi | 88% | 3038 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,260 psi | 90% | 3041 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,027 psi | 87% | 2989 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,926 psi | 88% | 2963 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,143 psi | 88% | 3163 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,217 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,301 psi | 85% | 3028 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,086 psi | 90% | 3153 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,664 psi | 86% | 3130 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,914 psi | 64% | 2858 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,918 psi | 72% | 3028 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,013 psi | 88% | 3051 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 53,345 psi | 86% | 3022 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,374 psi | 86% | 2986 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,637 psi | 89% | 2972 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,374 psi | 86% | 3012 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,695 psi | 89% | 3123 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 54,186 psi | 87% | 3031 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 54,186 psi | 87% | 3084 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 94% | 54,824 psi | 88% | 3048 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 55,666 psi | 89% | 3051 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,170 psi | 84% | 3015 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,332 psi | 89% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,926 psi | 88% | 3123 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 57% | 1880 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,476 psi | 86% | 2999 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 55,753 psi | 89% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,564 psi | 89% | 3022 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,666 psi | 89% | 2999 fps | 97.5% |
| IMR 4350 | <<locked>> | 98% | 54,041 psi | 87% | 3015 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,579 psi | 89% | 3025 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,492 psi | 89% | 3081 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,694 psi | 88% | 3061 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,027 psi | 87% | 2989 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,781 psi | 88% | 3012 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,650 psi | 88% | 2966 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,434 psi | 89% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,766 psi | 88% | 3015 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 55,796 psi | 89% | 3051 fps | 97.8% |
| Norma 201 | <<locked>> | 86% | 53,635 psi | 86% | 2979 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,230 psi | 87% | 2982 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,072 psi | 90% | 3071 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 53,896 psi | 86% | 3074 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 53,200 psi | 85% | 3038 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 52,634 psi | 84% | 3064 fps | 97.9% |
| Ramshot TAC | <<locked>> | 84% | 54,433 psi | 87% | 3005 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,027 psi | 87% | 3022 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,969 psi | 88% | 2989 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,737 psi | 57% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,650 psi | 88% | 3015 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,679 psi | 86% | 3094 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,519 psi | 86% | 3133 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,723 psi | 88% | 3110 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,360 psi | 87% | 3140 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 54,389 psi | 87% | 2963 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,172 psi | 87% | 2979 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,185 psi | 85% | 3012 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 53,374 psi | 86% | 2986 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,766 psi | 88% | 3015 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,781 psi | 88% | 3012 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,434 psi | 89% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,796 psi | 89% | 3051 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,027 psi | 88% | 3077 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,362 psi | 90% | 3035 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,476 psi | 86% | 3005 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,347 psi | 89% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,651 psi | 89% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,114 psi | 88% | 2966 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 55,129 psi | 88% | 3018 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,549 psi | 87% | 2917 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,043 psi | 90% | 3028 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 53,563 psi | 86% | 3012 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,837 psi | 83% | 3077 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,766 psi | 88% | 2884 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,680 psi | 89% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,099 psi | 87% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,882 psi | 88% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,955 psi | 88% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,434 psi | 90% | 3074 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 54,389 psi | 87% | 2986 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,069 psi | 85% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,463 psi | 89% | 3077 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,048 psi | 71% | 2940 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,156 psi | 85% | 2995 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,505 psi | 87% | 3035 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,186 psi | 87% | 3084 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,694 psi | 57% | 2848 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,345 psi | 86% | 3012 fps | 99.9% |
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% | 49,052 psi | 79% | 2835 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,365 psi | 66% | 2746 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,965 psi | 79% | 2910 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,372 psi | 81% | 2890 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 39,146 psi | 63% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,665 psi | 57% | 2713 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 45,295 psi | 73% | 2864 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,522 psi | 62% | 2703 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,442 psi | 76% | 2874 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,964 psi | 77% | 2864 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,524 psi | 67% | 2897 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,101 psi | 61% | 2723 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,944 psi | 66% | 2792 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,766 psi | 57% | 2730 fps | 95.4% |
| Alliant Reloder-17 | 58.2 gr | 80% | 32,866 psi | 53% | 2677 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,951 psi | 50% | 2618 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,740 psi | 62% | 2884 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,889 psi | 72% | 2871 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 37,666 psi | 60% | 2723 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 47,036 psi | 75% | 2871 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,211 psi | 79% | 2867 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,601 psi | 75% | 2897 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,605 psi | 83% | 3054 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,551 psi | 62% | 2726 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 90% | 44,135 psi | 71% | 2897 fps | 95% |
| Hodgdon H4350 | <<locked>> | 92% | 51,372 psi | 82% | 2989 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,716 psi | 73% | 2877 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,734 psi | 49% | 2559 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,945 psi | 67% | 2844 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 92% | 47,355 psi | 76% | 2982 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 42% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,888 psi | 70% | 2825 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 45,687 psi | 73% | 2877 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,451 psi | 65% | 2740 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,905 psi | 74% | 2825 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 47,471 psi | 76% | 2900 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,079 psi | 74% | 2854 fps | 95.3% |
| IMR 4831 | <<locked>> | 88% | 37,014 psi | 59% | 2730 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 41,945 psi | 67% | 2825 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,442 psi | 76% | 2874 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,498 psi | 71% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,266 psi | 73% | 2799 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,248 psi | 65% | 2743 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 39,972 psi | 64% | 2733 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 46,093 psi | 74% | 2881 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 44,222 psi | 71% | 2812 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,672 psi | 72% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,306 psi | 65% | 2779 fps | 98% |
| Norma URP | <<locked>> | 86% | 35,940 psi | 58% | 2717 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,234 psi | 65% | 2795 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 43,018 psi | 69% | 2881 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 47,572 psi | 76% | 2881 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,050 psi | 75% | 2900 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,401 psi | 82% | 2930 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,629 psi | 43% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,831 psi | 72% | 2838 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,366 psi | 70% | 2904 fps | 98.1% |
| ReloadSwiss RS 60 | 58.2 gr | 80% | 35,070 psi | 56% | 2753 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,159 psi | 61% | 2795 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,872 psi | 66% | 2867 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 48,196 psi | 77% | 2861 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,989 psi | 67% | 2759 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 35,375 psi | 57% | 2661 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 90% | 47,036 psi | 75% | 2871 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,972 psi | 64% | 2733 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,498 psi | 71% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,248 psi | 65% | 2743 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 46,093 psi | 74% | 2881 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,550 psi | 59% | 2717 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,818 psi | 73% | 2854 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,830 psi | 70% | 2828 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,643 psi | 73% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,000 psi | 61% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,063 psi | 72% | 2792 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 51,677 psi | 83% | 2963 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,223 psi | 73% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,672 psi | 73% | 2851 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,245 psi | 58% | 2671 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 28,036 psi | 45% | 2536 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 51,561 psi | 83% | 2838 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,064 psi | 74% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,669 psi | 67% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,322 psi | 68% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,519 psi | 55% | 2605 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,710 psi | 60% | 2723 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,558 psi | 76% | 2874 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,756 psi | 65% | 2740 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 37,101 psi | 59% | 2723 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 33,344 psi | 53% | 2697 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,705 psi | 49% | 2523 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,456 psi | 76% | 2920 fps | 100% |
| Winchester 760 | 64.2 gr | 90% | 44,295 psi | 71% | 2900 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,154 psi | 50% | 2703 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,366 psi | 70% | 2835 fps | 99.1% |
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 H&H Mag. loaded with the .308 | 150gr | Fox Classic Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,163 fps. Alliant Reloder-16 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 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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-17, ReloadSwiss RS 60, Winchester 760 rank at the top here: for .300 H&H Mag. with the .308 | 150gr | Fox Classic Hunter 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.