
Load Specifications
Load data in caliber .270 Win. with .277 | 125gr | Hasler Hunting 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 Power Pro 2000-MR, 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.
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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% | 55,288 psi | 89% | 2894 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,838 psi | 86% | 2913 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,811 psi | 89% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,301 psi | 85% | 2907 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 53,722 psi | 86% | 2959 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,983 psi | 87% | 3045 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 54,578 psi | 88% | 2995 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 55,651 psi | 89% | 2995 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,592 psi | 86% | 2946 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,447 psi | 87% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,549 psi | 87% | 3120 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,753 psi | 89% | 3018 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,231 psi | 90% | 3041 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,492 psi | 89% | 3107 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,272 psi | 85% | 3091 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,392 psi | 63% | 2815 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,440 psi | 71% | 2989 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,476 psi | 87% | 3009 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 52,808 psi | 85% | 2979 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,318 psi | 90% | 3002 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,259 psi | 89% | 2930 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,823 psi | 85% | 2969 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,042 psi | 88% | 3077 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 53,737 psi | 86% | 2992 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 53,490 psi | 86% | 3041 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 94% | 54,273 psi | 87% | 3005 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 55,114 psi | 88% | 3005 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,576 psi | 83% | 2976 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,853 psi | 88% | 3041 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,302 psi | 87% | 3077 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 57% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,171 psi | 85% | 2959 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 55,143 psi | 88% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,303 psi | 89% | 2982 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,201 psi | 89% | 2959 fps | 97.5% |
| IMR 4350 | <<locked>> | 98% | 53,301 psi | 85% | 2969 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,969 psi | 88% | 2982 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,824 psi | 88% | 3038 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,114 psi | 87% | 3018 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 53,592 psi | 86% | 2946 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,404 psi | 87% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,099 psi | 87% | 2923 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,984 psi | 88% | 2976 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,273 psi | 87% | 2972 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 55,027 psi | 88% | 3005 fps | 97.8% |
| Norma 201 | <<locked>> | 86% | 53,200 psi | 85% | 2940 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,722 psi | 86% | 2940 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,405 psi | 89% | 3025 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 53,142 psi | 85% | 3031 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 52,678 psi | 84% | 2999 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,724 psi | 89% | 3084 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 53,766 psi | 86% | 2959 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,548 psi | 86% | 2982 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,563 psi | 87% | 2946 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 57% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,056 psi | 87% | 2972 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,359 psi | 86% | 3054 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 52,881 psi | 85% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,954 psi | 87% | 3068 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,795 psi | 86% | 3097 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 53,954 psi | 87% | 2920 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,795 psi | 86% | 2940 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,333 psi | 90% | 3025 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,318 psi | 90% | 3002 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,273 psi | 87% | 2972 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,404 psi | 87% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,984 psi | 88% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,027 psi | 88% | 3005 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,679 psi | 88% | 3035 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,057 psi | 90% | 2999 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,214 psi | 85% | 2966 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,694 psi | 88% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,303 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,433 psi | 87% | 2923 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 54,607 psi | 88% | 2976 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,186 psi | 87% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,564 psi | 89% | 2986 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 52,910 psi | 85% | 2966 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,155 psi | 82% | 3035 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,607 psi | 88% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,969 psi | 88% | 2864 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,577 psi | 86% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,491 psi | 87% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,636 psi | 88% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,782 psi | 89% | 3031 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 53,983 psi | 87% | 2946 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,188 psi | 90% | 2966 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,839 psi | 88% | 3035 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,468 psi | 70% | 2900 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,246 psi | 90% | 3009 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,172 psi | 87% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 53,809 psi | 86% | 3045 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,172 psi | 56% | 2805 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,953 psi | 85% | 2972 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% | 48,718 psi | 78% | 2795 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,886 psi | 66% | 2703 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,573 psi | 78% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,009 psi | 80% | 2854 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 38,682 psi | 62% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,186 psi | 56% | 2674 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,976 psi | 72% | 2825 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 38,218 psi | 61% | 2667 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,137 psi | 76% | 2838 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,659 psi | 76% | 2825 fps | 100% |
| Alliant Power Pro 2000-MR | 47 gr | 80% | 41,104 psi | 66% | 2854 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,840 psi | 61% | 2687 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,640 psi | 65% | 2753 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,549 psi | 57% | 2694 fps | 95.4% |
| Alliant Reloder-17 | 46.3 gr | 80% | 32,692 psi | 52% | 2648 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,561 psi | 52% | 2641 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,305 psi | 61% | 2844 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,498 psi | 71% | 2831 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 37,376 psi | 60% | 2687 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 46,601 psi | 75% | 2828 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,747 psi | 78% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,108 psi | 74% | 2858 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,213 psi | 82% | 3015 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 38,348 psi | 61% | 2694 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 46,601 psi | 75% | 2917 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 92% | 50,850 psi | 82% | 2946 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,411 psi | 73% | 2838 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,443 psi | 49% | 2526 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,626 psi | 67% | 2808 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 92% | 46,717 psi | 75% | 2940 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 42% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,743 psi | 70% | 2789 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 45,121 psi | 72% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,089 psi | 64% | 2700 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,643 psi | 73% | 2785 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 46,891 psi | 75% | 2858 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,498 psi | 73% | 2812 fps | 95.3% |
| IMR 4831 | <<locked>> | 88% | 36,564 psi | 59% | 2690 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 41,640 psi | 67% | 2785 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,137 psi | 76% | 2838 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,019 psi | 71% | 2802 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,976 psi | 72% | 2762 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,900 psi | 64% | 2703 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 39,639 psi | 64% | 2694 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 45,643 psi | 73% | 2841 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 43,772 psi | 70% | 2772 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,396 psi | 71% | 2789 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,987 psi | 64% | 2740 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 35,636 psi | 57% | 2680 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,755 psi | 64% | 2756 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 42,685 psi | 68% | 2844 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 47,210 psi | 76% | 2844 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,630 psi | 75% | 2861 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,995 psi | 82% | 2890 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,440 psi | 42% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,396 psi | 71% | 2795 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,888 psi | 69% | 2861 fps | 98.2% |
| ReloadSwiss RS 60 | 46.3 gr | 80% | 34,867 psi | 56% | 2720 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,637 psi | 60% | 2753 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,654 psi | 65% | 2835 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 47,688 psi | 76% | 2818 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,669 psi | 67% | 2723 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 35,012 psi | 56% | 2625 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 46,601 psi | 75% | 2828 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,639 psi | 64% | 2694 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,019 psi | 71% | 2802 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,900 psi | 64% | 2703 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 45,643 psi | 73% | 2841 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,201 psi | 58% | 2680 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,281 psi | 73% | 2812 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,468 psi | 70% | 2792 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,310 psi | 73% | 2730 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,695 psi | 60% | 2589 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,585 psi | 71% | 2753 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 51,242 psi | 82% | 2920 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,817 psi | 72% | 2730 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,266 psi | 73% | 2812 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 35,868 psi | 58% | 2635 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 27,818 psi | 45% | 2503 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 51,213 psi | 82% | 2795 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,730 psi | 73% | 2723 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,307 psi | 66% | 2707 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,945 psi | 67% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,171 psi | 55% | 2569 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,275 psi | 60% | 2687 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,282 psi | 76% | 2835 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,553 psi | 65% | 2707 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,593 psi | 59% | 2680 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 32,895 psi | 53% | 2661 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,429 psi | 49% | 2487 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,181 psi | 76% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,845 psi | 70% | 2861 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,893 psi | 50% | 2667 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,047 psi | 69% | 2795 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 111 powders for .270 Win. loaded with the .277 | 125gr | Hasler Hunting. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,120 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.277" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .270 Win. with the .277 | 125gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.