Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 180gr | Sierra Pro-Hunter bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 49,400 psi | 90% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,776 psi | 89% | 2664 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,682 psi | 72% | 2628 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 49,545 psi | 90% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 48,646 psi | 88% | 2799 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 46,992 psi | 85% | 2694 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 48,037 psi | 87% | 2697 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 47,805 psi | 87% | 2776 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,168 psi | 89% | 2694 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 49,835 psi | 90% | 2664 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,327 psi | 90% | 2861 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 47,950 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,472 psi | 88% | 2740 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 47,355 psi | 86% | 2805 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 47,964 psi | 87% | 2838 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 46,702 psi | 85% | 2766 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,247 psi | 69% | 2664 fps | 99.7% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 33,895 psi | 62% | 2562 fps | 96% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,409 psi | 77% | 2818 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,603 psi | 90% | 2759 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 47,979 psi | 87% | 2733 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 48,472 psi | 88% | 2703 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,167 psi | 87% | 2723 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 48,921 psi | 89% | 2743 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 48,196 psi | 87% | 2795 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 92% | 49,211 psi | 89% | 2756 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 47,413 psi | 86% | 2703 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,821 psi | 90% | 2776 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,676 psi | 90% | 2785 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 48,443 psi | 88% | 2825 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 64% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 48,617 psi | 88% | 2707 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 47,224 psi | 86% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 47,718 psi | 87% | 2680 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 47,558 psi | 86% | 2657 fps | 97.9% |
| IMR 4350 | <<locked>> | 96% | 48,602 psi | 88% | 2733 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,456 psi | 86% | 2687 fps | 97.9% |
| IMR 4831 | <<locked>> | 98% | 49,269 psi | 89% | 2789 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 49,661 psi | 90% | 2769 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 49,168 psi | 89% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 49,632 psi | 90% | 2717 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 47,036 psi | 85% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 47,572 psi | 86% | 2680 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 49,559 psi | 90% | 2730 fps | 99.2% |
| Lovex S070 | <<locked>> | 94% | 47,268 psi | 86% | 2713 fps | 98.2% |
| Norma 201 | <<locked>> | 84% | 48,965 psi | 89% | 2687 fps | 100% |
| Norma 202 | <<locked>> | 84% | 49,516 psi | 90% | 2690 fps | 100% |
| Norma 203B | <<locked>> | 86% | 47,732 psi | 87% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 96% | 48,675 psi | 88% | 2776 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 42,612 psi | 77% | 2779 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 48,109 psi | 87% | 2789 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 47,674 psi | 87% | 2749 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 46,992 psi | 85% | 2785 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 49,284 psi | 89% | 2713 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 48,646 psi | 88% | 2730 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,969 psi | 65% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 49,298 psi | 89% | 2726 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,269 psi | 88% | 2799 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 47,645 psi | 86% | 2835 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 48,153 psi | 87% | 2818 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,022 psi | 87% | 2844 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 86% | 49,458 psi | 90% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 47,892 psi | 87% | 2723 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 45,266 psi | 82% | 2746 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 92% | 48,472 psi | 88% | 2703 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 49,559 psi | 90% | 2730 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 49,632 psi | 90% | 2717 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 47,572 psi | 86% | 2680 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 47,268 psi | 86% | 2713 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 49,458 psi | 90% | 2785 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 47,442 psi | 86% | 2687 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 48,660 psi | 88% | 2720 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 47,630 psi | 86% | 2582 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 47,601 psi | 86% | 2585 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 49,705 psi | 90% | 2680 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 44,860 psi | 81% | 2743 fps | 96.2% |
| Somchem S335 | <<locked>> | 82% | 47,195 psi | 86% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,253 psi | 86% | 2680 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 48,588 psi | 88% | 2726 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,124 psi | 89% | 2835 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 45,774 psi | 83% | 2726 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 82% | 47,950 psi | 87% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,240 psi | 89% | 2651 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 49,777 psi | 90% | 2667 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,574 psi | 90% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 47,384 psi | 86% | 2733 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 49,400 psi | 90% | 2690 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 48,167 psi | 87% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 49,458 psi | 90% | 2789 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,597 psi | 75% | 2733 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 47,326 psi | 86% | 2710 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 49,269 psi | 89% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 48,443 psi | 88% | 2799 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,156 psi | 62% | 2680 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,211 psi | 87% | 2723 fps | 100% |
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 2495 | <<locked>> | 80% | 40,814 psi | 74% | 2533 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,263 psi | 73% | 2510 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 32,372 psi | 59% | 2474 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 38,580 psi | 70% | 2536 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 27,949 psi | 51% | 2375 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,150 psi | 80% | 2644 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 37,536 psi | 68% | 2503 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 98% | 44,817 psi | 81% | 2720 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,180 psi | 84% | 2644 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,557 psi | 84% | 2621 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,030 psi | 73% | 2687 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,188 psi | 67% | 2530 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,856 psi | 72% | 2589 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,051 psi | 53% | 2392 fps | 95.7% |
| Alliant Reloder-17 | 46.4 gr | 80% | 32,082 psi | 58% | 2513 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 43,918 psi | 80% | 2717 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 25,034 psi | 45% | 2306 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 31,908 psi | 58% | 2510 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 90% | 30,197 psi | 55% | 2523 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,308 psi | 79% | 2654 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 36,782 psi | 67% | 2533 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 37,913 psi | 69% | 2503 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,991 psi | 82% | 2674 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,666 psi | 68% | 2539 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 37,159 psi | 67% | 2585 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 40,828 psi | 74% | 2605 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 44,527 psi | 81% | 2654 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,498 psi | 48% | 2293 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,509 psi | 74% | 2635 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 39,175 psi | 71% | 2648 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 48% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,830 psi | 78% | 2612 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 44,164 psi | 80% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,421 psi | 72% | 2533 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,032 psi | 76% | 2556 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 37,898 psi | 69% | 2533 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 37,101 psi | 67% | 2487 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 27,398 psi | 50% | 2339 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 40,843 psi | 74% | 2618 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 46,180 psi | 84% | 2644 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,337 psi | 79% | 2621 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,193 psi | 80% | 2579 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 39,349 psi | 71% | 2536 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 32,445 psi | 59% | 2392 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 36,854 psi | 67% | 2516 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 43,410 psi | 79% | 2598 fps | 100% |
| Norma 202 | <<locked>> | 80% | 43,584 psi | 79% | 2598 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,247 psi | 71% | 2579 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 42,612 psi | 77% | 2664 fps | 95% |
| Norma MRP | <<locked>> | 96% | 37,376 psi | 68% | 2664 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 28,834 psi | 52% | 2385 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,725 psi | 70% | 2592 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 34,127 psi | 62% | 2523 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 46,151 psi | 84% | 2661 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,716 psi | 83% | 2680 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,760 psi | 49% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,072 psi | 69% | 2520 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,003 psi | 76% | 2690 fps | 99.6% |
| ReloadSwiss RS 60 | 46.4 gr | 80% | 34,127 psi | 62% | 2572 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 29,907 psi | 54% | 2444 fps | 95.8% |
| ReloadSwiss RS 70 | 49.5 gr | 84% | 32,372 psi | 59% | 2507 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 41,162 psi | 75% | 2549 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 34,737 psi | 63% | 2484 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 98% | 42,438 psi | 77% | 2694 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 37,913 psi | 69% | 2503 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 32,445 psi | 59% | 2392 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,337 psi | 79% | 2621 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,349 psi | 71% | 2536 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 36,854 psi | 67% | 2516 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,592 psi | 65% | 2533 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,512 psi | 81% | 2638 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,743 psi | 78% | 2618 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,628 psi | 81% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,115 psi | 67% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 35,665 psi | 65% | 2431 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 42,076 psi | 76% | 2687 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 44,382 psi | 81% | 2543 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,150 psi | 80% | 2631 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 35,578 psi | 65% | 2487 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 25,773 psi | 47% | 2339 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 37,536 psi | 68% | 2572 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 44,962 psi | 82% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,654 psi | 74% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,423 psi | 75% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,852 psi | 61% | 2425 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 29,950 psi | 54% | 2379 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 46,311 psi | 84% | 2641 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,769 psi | 72% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 29,457 psi | 53% | 2385 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 26,513 psi | 48% | 2379 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,921 psi | 54% | 2359 fps | 98% |
| Winchester 748 | <<locked>> | 80% | 45,948 psi | 83% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 37,159 psi | 67% | 2585 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 24,976 psi | 45% | 2379 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,018 psi | 76% | 2621 fps | 99.9% |
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 95 powders for 7.5 x 55 Swiss loaded with the .308 | 180gr | Sierra Pro-Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,861 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 7.5 x 55 Swiss with the .308 | 180gr | Sierra Pro-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.