Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 150gr | Peregrine Plainsmaster (VLR-4) 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 60, Alliant Reloder-17 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.
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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>> | 84% | 55,796 psi | 89% | 2936 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,331 psi | 87% | 2956 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,881 psi | 85% | 2976 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,969 psi | 87% | 2956 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 54,650 psi | 88% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,969 psi | 88% | 3094 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 55,071 psi | 88% | 3041 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,260 psi | 90% | 3041 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,259 psi | 87% | 2995 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,969 psi | 88% | 2966 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,100 psi | 88% | 3166 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 52,895 psi | 85% | 3009 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,316 psi | 85% | 3031 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,304 psi | 90% | 3159 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,882 psi | 86% | 3133 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,089 psi | 64% | 2864 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,121 psi | 72% | 3035 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,216 psi | 89% | 3054 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 53,330 psi | 86% | 3022 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,577 psi | 86% | 2989 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,869 psi | 90% | 2976 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,650 psi | 86% | 3018 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,680 psi | 89% | 3123 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 54,433 psi | 87% | 3038 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 54,186 psi | 87% | 3087 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 94% | 54,810 psi | 88% | 3051 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 55,651 psi | 89% | 3051 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,402 psi | 84% | 3022 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,579 psi | 89% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,143 psi | 88% | 3130 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 57% | 1880 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,722 psi | 86% | 3005 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 55,767 psi | 89% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,825 psi | 90% | 3025 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,637 psi | 89% | 3002 fps | 97.6% |
| IMR 4350 | <<locked>> | 98% | 54,027 psi | 87% | 3018 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,550 psi | 89% | 3028 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 3084 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,694 psi | 88% | 3064 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,259 psi | 87% | 2995 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,056 psi | 88% | 3018 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,650 psi | 88% | 2969 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,463 psi | 89% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,998 psi | 88% | 3018 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 55,999 psi | 90% | 3058 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 53,621 psi | 86% | 2982 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,520 psi | 87% | 2989 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,043 psi | 90% | 3071 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 54,157 psi | 87% | 3081 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 53,214 psi | 85% | 3041 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 52,866 psi | 85% | 3071 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 54,404 psi | 87% | 3005 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,244 psi | 87% | 3028 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,955 psi | 88% | 2989 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 57% | 1926 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,650 psi | 88% | 3015 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,925 psi | 86% | 3100 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,780 psi | 86% | 3140 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,984 psi | 88% | 3117 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,317 psi | 87% | 3143 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 54,389 psi | 87% | 2966 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,143 psi | 87% | 2982 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,200 psi | 85% | 3015 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 53,577 psi | 86% | 2989 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,998 psi | 88% | 3018 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,056 psi | 88% | 3018 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,463 psi | 89% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,999 psi | 90% | 3058 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,274 psi | 89% | 3081 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,765 psi | 85% | 2979 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,693 psi | 86% | 3009 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,347 psi | 89% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,622 psi | 89% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,376 psi | 89% | 2972 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 55,361 psi | 89% | 3025 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,563 psi | 87% | 2920 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,318 psi | 90% | 3031 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 53,592 psi | 86% | 3015 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,040 psi | 83% | 3081 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,071 psi | 88% | 2887 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,666 psi | 89% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,128 psi | 87% | 2949 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,143 psi | 88% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,172 psi | 88% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 52,968 psi | 85% | 3022 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 54,665 psi | 88% | 2992 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,316 psi | 85% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,695 psi | 89% | 3084 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,019 psi | 71% | 2943 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,330 psi | 86% | 3002 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,766 psi | 88% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,447 psi | 87% | 3091 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,853 psi | 57% | 2858 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,621 psi | 86% | 3018 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 2015 | <<locked>> | 80% | 49,313 psi | 79% | 2841 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,597 psi | 67% | 2749 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,197 psi | 79% | 2917 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,386 psi | 81% | 2894 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 39,392 psi | 63% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,665 psi | 57% | 2717 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 45,513 psi | 73% | 2871 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 38,551 psi | 62% | 2707 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,674 psi | 76% | 2881 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,225 psi | 77% | 2867 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,539 psi | 67% | 2897 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,319 psi | 61% | 2730 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,162 psi | 66% | 2799 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,955 psi | 58% | 2736 fps | 95.5% |
| Alliant Reloder-17 | 58.4 gr | 80% | 33,069 psi | 53% | 2684 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,922 psi | 50% | 2618 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,928 psi | 62% | 2890 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,889 psi | 72% | 2871 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 37,869 psi | 61% | 2730 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 47,239 psi | 76% | 2877 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,240 psi | 79% | 2867 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,615 psi | 75% | 2900 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,851 psi | 83% | 3061 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 38,769 psi | 62% | 2733 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 90% | 44,324 psi | 71% | 2904 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 92% | 51,358 psi | 82% | 2989 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 45,977 psi | 74% | 2884 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,777 psi | 49% | 2562 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,192 psi | 68% | 2851 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 47,529 psi | 76% | 2989 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 42% | 1683 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,121 psi | 71% | 2831 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 45,745 psi | 73% | 2877 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,480 psi | 65% | 2743 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,905 psi | 74% | 2825 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 47,674 psi | 76% | 2904 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,079 psi | 74% | 2858 fps | 95.3% |
| IMR 4831 | <<locked>> | 86% | 34,708 psi | 56% | 2674 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 42,206 psi | 68% | 2831 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,674 psi | 76% | 2881 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,744 psi | 72% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,513 psi | 73% | 2808 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,466 psi | 65% | 2749 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 39,958 psi | 64% | 2733 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 43,352 psi | 70% | 2825 fps | 95% |
| Norma 201 | <<locked>> | 80% | 44,440 psi | 71% | 2818 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 44,947 psi | 72% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,509 psi | 65% | 2785 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 36,129 psi | 58% | 2723 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,248 psi | 65% | 2795 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 43,192 psi | 69% | 2887 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 47,558 psi | 76% | 2884 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,268 psi | 76% | 2907 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,387 psi | 82% | 2933 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,556 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,032 psi | 67% | 2779 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,598 psi | 70% | 2910 fps | 98.2% |
| ReloadSwiss RS 60 | 58.4 gr | 80% | 35,244 psi | 57% | 2759 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,363 psi | 62% | 2802 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,075 psi | 66% | 2874 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 48,211 psi | 77% | 2864 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,206 psi | 68% | 2766 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 35,578 psi | 57% | 2667 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 47,239 psi | 76% | 2877 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,958 psi | 64% | 2733 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,744 psi | 72% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,466 psi | 65% | 2749 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 43,352 psi | 70% | 2825 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,767 psi | 59% | 2723 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,803 psi | 73% | 2854 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,077 psi | 71% | 2835 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,687 psi | 73% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,014 psi | 61% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,281 psi | 73% | 2795 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 51,663 psi | 83% | 2966 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,440 psi | 73% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,687 psi | 73% | 2854 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,448 psi | 58% | 2677 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 28,195 psi | 45% | 2543 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 51,576 psi | 83% | 2838 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,108 psi | 74% | 2766 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,727 psi | 67% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,540 psi | 68% | 2759 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,708 psi | 56% | 2612 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,710 psi | 60% | 2726 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,805 psi | 77% | 2877 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,944 psi | 66% | 2746 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 37,115 psi | 60% | 2723 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 33,562 psi | 54% | 2703 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,719 psi | 49% | 2523 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,703 psi | 76% | 2927 fps | 100% |
| Winchester 760 | 64.3 gr | 90% | 44,324 psi | 71% | 2904 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,299 psi | 50% | 2710 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,584 psi | 70% | 2838 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 | Peregrine Plainsmaster (VLR-4). Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,166 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 1:11.5 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. ReloadSwiss RS 60, Alliant Reloder-17, Winchester 760 rank at the top here: for .300 H&H Mag. with the .308 | 150gr | Peregrine Plainsmaster (VLR-4) 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.