Load Specifications
Load data in caliber .260 Ackley Improved with .264 | 100gr | Nosler Ballistic Tip Hunting bullet and 93 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 Power Pro 2000-MR 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.
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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>> | 88% | 56,173 psi | 90% | 3058 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,650 psi | 88% | 3081 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,288 psi | 87% | 3077 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,939 psi | 85% | 3091 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 53,911 psi | 86% | 3117 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,676 psi | 80% | 3114 fps | 97.6% |
| Accurate LT-30 | <<locked>> | 82% | 55,521 psi | 89% | 3002 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,912 psi | 90% | 3031 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,419 psi | 89% | 3153 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 96% | 56,347 psi | 90% | 3146 fps | 99% |
| ADI AR 2219 | <<locked>> | 82% | 56,275 psi | 90% | 3127 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,389 psi | 87% | 3104 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 88% | 54,694 psi | 88% | 3094 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,927 psi | 90% | 3219 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,013 psi | 88% | 3268 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,970 psi | 90% | 3169 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,927 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,069 psi | 85% | 3130 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,834 psi | 78% | 3120 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,939 psi | 85% | 3225 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,549 psi | 87% | 2989 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,172 psi | 88% | 3159 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 52,634 psi | 84% | 3123 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,316 psi | 85% | 3041 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,417 psi | 86% | 3130 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,172 psi | 88% | 3228 fps | 99% |
| Hodgdon H322 | <<locked>> | 84% | 55,158 psi | 88% | 3110 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,475 psi | 84% | 3074 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,041 psi | 87% | 3130 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 90% | 55,941 psi | 90% | 3166 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,918 psi | 72% | 2992 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,984 psi | 88% | 3196 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,722 psi | 56% | 1929 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,650 psi | 86% | 3110 fps | 99.4% |
| IMR 3031 | <<locked>> | 90% | 55,071 psi | 88% | 3153 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,898 psi | 90% | 3130 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,202 psi | 90% | 3100 fps | 96% |
| IMR 4198 | <<locked>> | 84% | 55,854 psi | 90% | 3028 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,593 psi | 89% | 3117 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,297 psi | 76% | 3048 fps | 97.2% |
| IMR 4895 | <<locked>> | 92% | 54,433 psi | 87% | 3166 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 88% | 54,389 psi | 87% | 3104 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 54,578 psi | 88% | 3087 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,810 psi | 88% | 3130 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,216 psi | 89% | 3077 fps | 99.3% |
| Lovex S062 | <<locked>> | 94% | 55,521 psi | 89% | 3127 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 3110 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 53,853 psi | 86% | 3094 fps | 99.8% |
| Norma 202 | <<locked>> | 90% | 54,520 psi | 87% | 3104 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,898 psi | 90% | 3179 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 49,327 psi | 79% | 3107 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 92% | 52,866 psi | 85% | 3146 fps | 99% |
| Ramshot TAC | <<locked>> | 88% | 55,114 psi | 88% | 3114 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,418 psi | 87% | 3136 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,666 psi | 89% | 3104 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,041 psi | 56% | 1972 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,027 psi | 87% | 3091 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,607 psi | 88% | 3110 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,229 psi | 85% | 3202 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,736 psi | 85% | 3235 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,530 psi | 79% | 3133 fps | 97.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,270 psi | 81% | 3153 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 88% | 54,868 psi | 88% | 3084 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,621 psi | 88% | 3094 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 98% | 55,927 psi | 90% | 3166 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,578 psi | 88% | 3110 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,810 psi | 88% | 3130 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,521 psi | 89% | 3127 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,737 psi | 86% | 3051 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,534 psi | 87% | 3179 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,432 psi | 86% | 3041 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,374 psi | 86% | 3087 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,882 psi | 86% | 3120 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,144 psi | 90% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,680 psi | 89% | 3031 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,187 psi | 88% | 3058 fps | 95.8% |
| Somchem S321 | <<locked>> | 86% | 55,970 psi | 90% | 3143 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 54,955 psi | 88% | 3035 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,347 psi | 90% | 3140 fps | 99.4% |
| Somchem S355 | <<locked>> | 98% | 56,376 psi | 90% | 3166 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,801 psi | 70% | 3041 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 86% | 55,796 psi | 89% | 3015 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,115 psi | 90% | 3031 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,838 psi | 86% | 3068 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,853 psi | 88% | 3077 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,549 psi | 87% | 3094 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,924 psi | 83% | 3107 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 88% | 55,129 psi | 88% | 3104 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 53,345 psi | 86% | 3074 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,894 psi | 82% | 3107 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,084 psi | 85% | 3091 fps | 99.5% |
| Winchester 748 | <<locked>> | 88% | 54,636 psi | 88% | 3156 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,548 psi | 86% | 3127 fps | 99.5% |
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% | 43,772 psi | 70% | 2858 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,703 psi | 76% | 2966 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,332 psi | 58% | 2756 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,975 psi | 69% | 2913 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 34,330 psi | 55% | 2733 fps | 98.7% |
| Accurate 4350 | <<locked>> | 94% | 40,292 psi | 65% | 2923 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 51,938 psi | 83% | 2949 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,272 psi | 84% | 2972 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,161 psi | 64% | 2854 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 38,928 psi | 62% | 2805 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 52,866 psi | 85% | 3074 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,163 psi | 68% | 2874 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 41,640 psi | 67% | 2884 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,936 psi | 78% | 3094 fps | 98.9% |
| Alliant Power Pro 2000-MR | 42.3 gr | 84% | 41,626 psi | 67% | 2989 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,446 psi | 54% | 2707 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,385 psi | 79% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,566 psi | 62% | 2838 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,495 psi | 65% | 2933 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,462 psi | 57% | 2838 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,242 psi | 82% | 2940 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 41,989 psi | 67% | 2910 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 32,996 psi | 53% | 2707 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,324 psi | 71% | 2877 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,654 psi | 65% | 2887 fps | 98.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,817 psi | 72% | 3035 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 80% | 48,283 psi | 77% | 2999 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,052 psi | 79% | 3018 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 44,280 psi | 71% | 2949 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 40,451 psi | 65% | 2867 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,780 psi | 56% | 2756 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,419 psi | 58% | 2822 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 42% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,001 psi | 63% | 2818 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 39,755 psi | 64% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 38,130 psi | 61% | 2782 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,953 psi | 85% | 3041 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 49,603 psi | 80% | 2933 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,388 psi | 84% | 3061 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 41,350 psi | 66% | 2927 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 36,840 psi | 59% | 2808 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 42,163 psi | 68% | 2874 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 47,688 psi | 76% | 2972 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 38,885 psi | 62% | 2835 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 40,727 psi | 65% | 2802 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 35,665 psi | 57% | 2733 fps | 96.6% |
| Lovex S065 | <<locked>> | 96% | 48,080 psi | 77% | 2992 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 39,436 psi | 63% | 2812 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 39,523 psi | 63% | 2828 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 35,418 psi | 57% | 2762 fps | 95% |
| Norma URP | <<locked>> | 94% | 40,567 psi | 65% | 2927 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 82% | 37,376 psi | 60% | 2828 fps | 95.4% |
| Ramshot TAC | <<locked>> | 82% | 45,107 psi | 72% | 2927 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,379 psi | 66% | 2887 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,861 psi | 74% | 2927 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 42% | 1768 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,543 psi | 76% | 2976 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 51,387 psi | 82% | 3051 fps | 95.7% |
| ReloadSwiss RS 52 | 40 gr | 82% | 39,914 psi | 64% | 2936 fps | 95.8% |
| ReloadSwiss RS 60 | 39.7 gr | 80% | 30,908 psi | 50% | 2713 fps | 95.8% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 43,033 psi | 69% | 3002 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 47,007 psi | 75% | 3087 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 43,120 psi | 69% | 2874 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 37,594 psi | 60% | 2759 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 35,346 psi | 57% | 2762 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 48,080 psi | 77% | 2992 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,885 psi | 62% | 2835 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 35,665 psi | 57% | 2733 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,198 psi | 80% | 2992 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,550 psi | 59% | 2815 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,125 psi | 80% | 2992 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,207 psi | 69% | 2894 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,899 psi | 62% | 2822 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,017 psi | 66% | 2782 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,852 psi | 54% | 2631 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,808 psi | 83% | 3002 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 45,542 psi | 73% | 2959 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 40,509 psi | 65% | 2782 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 39,958 psi | 64% | 2835 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 34,011 psi | 55% | 2713 fps | 95% |
| Somchem S365 | <<locked>> | 90% | 31,676 psi | 51% | 2736 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 46,470 psi | 75% | 2867 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,220 psi | 66% | 2785 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,622 psi | 59% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,362 psi | 60% | 2759 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 30,269 psi | 49% | 2589 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 94% | 42,685 psi | 68% | 2930 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 42,409 psi | 68% | 2874 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 36,143 psi | 58% | 2743 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 94% | 41,742 psi | 67% | 2927 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,491 psi | 57% | 2730 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 41,437 psi | 66% | 2913 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,072 psi | 61% | 2818 fps | 96.6% |
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 93 powders for .260 Ackley Improved loaded with the .264 | 100gr | Nosler Ballistic Tip Hunting. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,268 fps. Accurate 4350 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.264" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .260 Ackley Improved with the .264 | 100gr | Nosler Ballistic Tip Hunting 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.