Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 159gr | Hasler ARIETE 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.
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: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 47,645 psi | 86% | 2736 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 48,805 psi | 89% | 2802 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 47,036 psi | 85% | 2792 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 46,847 psi | 85% | 2815 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 46,934 psi | 85% | 2831 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,786 psi | 78% | 2838 fps | 98% |
| ADI AR 2206H | <<locked>> | 90% | 49,661 psi | 90% | 2874 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 47,877 psi | 87% | 2822 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 88% | 49,269 psi | 89% | 2831 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 48,631 psi | 88% | 2812 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 47,268 psi | 86% | 2884 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 48,907 psi | 89% | 2979 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 49,661 psi | 90% | 2890 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 47,776 psi | 87% | 2749 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 47,558 psi | 86% | 2861 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,410 psi | 79% | 2848 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 46,862 psi | 85% | 2946 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 49,168 psi | 89% | 2884 fps | 99% |
| Bofors RP3 | <<locked>> | 96% | 49,443 psi | 90% | 2897 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 48,501 psi | 88% | 2772 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 47,703 psi | 87% | 2861 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 49,284 psi | 89% | 2949 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 49,734 psi | 90% | 2831 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 47,326 psi | 86% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 47,964 psi | 87% | 2858 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 46,862 psi | 85% | 2890 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 47,050 psi | 85% | 2835 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,595 psi | 72% | 2730 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 48,704 psi | 88% | 2917 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,113 psi | 62% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 48,573 psi | 88% | 2841 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 49,182 psi | 89% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 47,297 psi | 86% | 2802 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,124 psi | 87% | 2779 fps | 95.9% |
| IMR 4198 | <<locked>> | 82% | 48,573 psi | 88% | 2710 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,031 psi | 74% | 2779 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 48,733 psi | 88% | 2897 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 49,269 psi | 89% | 2831 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 48,762 psi | 88% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 48,153 psi | 87% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 47,543 psi | 86% | 2759 fps | 99.3% |
| Lovex S062 | <<locked>> | 94% | 49,530 psi | 90% | 2851 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,414 psi | 88% | 2831 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 45,876 psi | 83% | 2808 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 48,370 psi | 88% | 2818 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 48,907 psi | 89% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 94% | 49,792 psi | 90% | 2900 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 43,265 psi | 79% | 2835 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 92% | 46,586 psi | 85% | 2867 fps | 99.2% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 42,815 psi | 78% | 2822 fps | 95.8% |
| Ramshot TAC | <<locked>> | 88% | 49,617 psi | 90% | 2841 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 88% | 48,660 psi | 88% | 2864 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 47,442 psi | 86% | 2782 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,519 psi | 63% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 48,950 psi | 89% | 2818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,921 psi | 89% | 2838 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 46,557 psi | 84% | 2917 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 46,789 psi | 85% | 2953 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,844 psi | 78% | 2858 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 44,469 psi | 81% | 2877 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 88% | 49,603 psi | 90% | 2808 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 48,950 psi | 89% | 2818 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 49,313 psi | 89% | 2887 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,414 psi | 88% | 2831 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 48,153 psi | 87% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 49,530 psi | 90% | 2851 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 45,876 psi | 83% | 2808 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 48,805 psi | 89% | 2782 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 48,196 psi | 87% | 2904 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 48,733 psi | 88% | 2766 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 47,398 psi | 86% | 2812 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 48,153 psi | 87% | 2844 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 47,921 psi | 87% | 2723 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 47,413 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 48,849 psi | 89% | 2785 fps | 96.2% |
| Somchem S321 | <<locked>> | 84% | 46,659 psi | 85% | 2812 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 49,734 psi | 90% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 46,920 psi | 85% | 2805 fps | 99.2% |
| Somchem S355 | <<locked>> | 96% | 47,050 psi | 85% | 2838 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,406 psi | 70% | 2782 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 47,747 psi | 87% | 2694 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 47,950 psi | 87% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 47,790 psi | 87% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 49,516 psi | 90% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 48,530 psi | 88% | 2822 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,890 psi | 83% | 2835 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 88% | 49,632 psi | 90% | 2828 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 47,630 psi | 86% | 2805 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,701 psi | 81% | 2841 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,326 psi | 86% | 2825 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 48,501 psi | 88% | 2874 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 47,181 psi | 86% | 2897 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 47,500 psi | 86% | 2851 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 39,160 psi | 71% | 2598 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 42,685 psi | 77% | 2703 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 31,270 psi | 57% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,029 psi | 69% | 2661 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 29,602 psi | 54% | 2490 fps | 99.2% |
| Accurate 4350 | <<locked>> | 94% | 34,389 psi | 62% | 2667 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 36,056 psi | 65% | 2612 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 32,808 psi | 60% | 2516 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,130 psi | 69% | 2628 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 36,840 psi | 67% | 2628 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,976 psi | 80% | 2825 fps | 99.4% |
| Alliant Power Pro 2000-MR | 44.7 gr | 82% | 34,853 psi | 63% | 2677 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,602 psi | 54% | 2484 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,759 psi | 81% | 2700 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 32,039 psi | 58% | 2539 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 33,924 psi | 62% | 2628 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 84% | 29,385 psi | 53% | 2539 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 34,969 psi | 63% | 2605 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 28,660 psi | 52% | 2474 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,350 psi | 73% | 2628 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,027 psi | 65% | 2641 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 39,668 psi | 72% | 2772 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 43,656 psi | 79% | 2736 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,179 psi | 80% | 2756 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 36,840 psi | 67% | 2644 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 98% | 43,743 psi | 79% | 2835 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 36,318 psi | 66% | 2625 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 30,676 psi | 56% | 2520 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,503 psi | 59% | 2589 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,338 psi | 46% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,157 psi | 64% | 2582 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 34,969 psi | 63% | 2628 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,198 psi | 58% | 2493 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 45,252 psi | 82% | 2726 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 45,818 psi | 83% | 2667 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 33,765 psi | 61% | 2625 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 32,764 psi | 59% | 2572 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 38,130 psi | 69% | 2628 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 42,395 psi | 77% | 2707 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 34,171 psi | 62% | 2592 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 37,086 psi | 67% | 2559 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 31,705 psi | 58% | 2500 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 40,161 psi | 73% | 2680 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 43,062 psi | 78% | 2759 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 35,186 psi | 64% | 2566 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 35,433 psi | 64% | 2589 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 31,401 psi | 57% | 2530 fps | 95.9% |
| Norma URP | <<locked>> | 92% | 33,562 psi | 61% | 2621 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 31,096 psi | 56% | 2533 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 98% | 40,277 psi | 73% | 2769 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 38,014 psi | 69% | 2621 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,970 psi | 67% | 2644 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,510 psi | 75% | 2677 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,541 psi | 46% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,902 psi | 78% | 2717 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 42,960 psi | 78% | 2733 fps | 95.5% |
| ReloadSwiss RS 52 | 42.3 gr | 80% | 33,083 psi | 60% | 2631 fps | 95.8% |
| ReloadSwiss RS 60 | 42.9 gr | 80% | 27,383 psi | 50% | 2490 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 34,925 psi | 63% | 2687 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 38,740 psi | 70% | 2756 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 38,841 psi | 70% | 2621 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 33,605 psi | 61% | 2523 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 28,761 psi | 52% | 2470 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 40,161 psi | 73% | 2680 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,171 psi | 62% | 2592 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 31,705 psi | 58% | 2500 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 43,062 psi | 78% | 2759 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,469 psi | 83% | 2730 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 30,371 psi | 55% | 2523 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,614 psi | 83% | 2717 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 35,795 psi | 65% | 2585 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,809 psi | 63% | 2582 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,159 psi | 67% | 2536 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,313 psi | 55% | 2405 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 45,339 psi | 82% | 2730 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 40,683 psi | 74% | 2703 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 36,434 psi | 66% | 2539 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 35,520 psi | 64% | 2589 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 28,094 psi | 51% | 2431 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 26,165 psi | 47% | 2454 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 42,308 psi | 77% | 2608 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,275 psi | 68% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,314 psi | 59% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,446 psi | 61% | 2523 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 26,687 psi | 48% | 2372 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 35,302 psi | 64% | 2625 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 38,058 psi | 69% | 2625 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 32,010 psi | 58% | 2510 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 34,287 psi | 62% | 2625 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 29,530 psi | 54% | 2444 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 36,709 psi | 67% | 2661 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 44,005 psi | 80% | 2838 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,895 psi | 62% | 2585 fps | 97.4% |
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 106 powders for 7.5 x 55 Swiss loaded with the .308 | 159gr | Hasler ARIETE. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,979 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 159.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 7.5 x 55 Swiss with the .308 | 159gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-26, Hodgdon H4350, IMR 4350 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.