Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 180gr | Remington PSP Core-Lokt 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, Hodgdon Superformance and Alliant Reloder-17.
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% | 48,530 psi | 88% | 2644 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,921 psi | 87% | 2638 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,711 psi | 70% | 2602 fps | 97.2% |
| Accurate 4064 | <<locked>> | 88% | 48,733 psi | 88% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 47,398 psi | 86% | 2769 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 49,255 psi | 89% | 2723 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 47,355 psi | 86% | 2677 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 46,862 psi | 85% | 2746 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,428 psi | 88% | 2674 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 48,834 psi | 89% | 2644 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 48,428 psi | 88% | 2838 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 46,456 psi | 84% | 2746 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 46,992 psi | 85% | 2697 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 47,471 psi | 86% | 2717 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 49,342 psi | 90% | 2828 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 46,847 psi | 85% | 2812 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 45,774 psi | 83% | 2740 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,405 psi | 68% | 2638 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,582 psi | 75% | 2792 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,689 psi | 88% | 2736 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 47,007 psi | 85% | 2710 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 47,601 psi | 86% | 2680 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 47,195 psi | 86% | 2700 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 47,964 psi | 87% | 2720 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 47,326 psi | 86% | 2772 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 48,385 psi | 88% | 2733 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 49,690 psi | 90% | 2730 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,660 psi | 88% | 2753 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 48,733 psi | 88% | 2766 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 47,529 psi | 86% | 2799 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 64% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,877 psi | 87% | 2687 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 49,516 psi | 90% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,821 psi | 90% | 2707 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,963 psi | 85% | 2638 fps | 97.7% |
| IMR 4350 | <<locked>> | 96% | 47,790 psi | 87% | 2707 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,661 psi | 90% | 2717 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 48,385 psi | 88% | 2766 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 48,660 psi | 88% | 2746 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 48,428 psi | 88% | 2674 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 48,559 psi | 88% | 2694 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 49,313 psi | 89% | 2651 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 49,603 psi | 90% | 2703 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 48,660 psi | 88% | 2707 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 49,472 psi | 90% | 2743 fps | 98.5% |
| Norma 201 | <<locked>> | 84% | 48,211 psi | 87% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 84% | 48,689 psi | 88% | 2671 fps | 100% |
| Norma 203B | <<locked>> | 88% | 49,806 psi | 90% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 96% | 47,659 psi | 86% | 2746 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 41,800 psi | 76% | 2753 fps | 96.7% |
| Norma URP | <<locked>> | 96% | 47,239 psi | 86% | 2766 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 46,760 psi | 85% | 2730 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 49,313 psi | 89% | 2815 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 48,414 psi | 88% | 2690 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 47,979 psi | 87% | 2710 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,955 psi | 65% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,457 psi | 88% | 2703 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 47,137 psi | 86% | 2776 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 46,818 psi | 85% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 47,007 psi | 85% | 2792 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,123 psi | 86% | 2818 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 49,443 psi | 90% | 2651 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,660 psi | 88% | 2667 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 46,847 psi | 85% | 2700 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 44,251 psi | 80% | 2717 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 92% | 47,601 psi | 86% | 2680 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,660 psi | 88% | 2707 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 48,559 psi | 88% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 49,603 psi | 90% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 49,472 psi | 90% | 2743 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 48,559 psi | 88% | 2762 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 46,804 psi | 85% | 2667 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 47,703 psi | 87% | 2694 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,719 psi | 90% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,748 psi | 90% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,892 psi | 89% | 2661 fps | 98.1% |
| Somchem S335 | <<locked>> | 84% | 49,197 psi | 89% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 49,632 psi | 90% | 2710 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 47,645 psi | 86% | 2703 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,950 psi | 87% | 2812 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,773 psi | 81% | 2700 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 82% | 47,108 psi | 85% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 48,370 psi | 88% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 49,066 psi | 89% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,646 psi | 88% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 49,327 psi | 90% | 2753 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 48,602 psi | 88% | 2671 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 47,268 psi | 86% | 2651 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 48,631 psi | 88% | 2769 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,495 psi | 73% | 2707 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 49,763 psi | 90% | 2736 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 48,240 psi | 88% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 47,326 psi | 86% | 2772 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,489 psi | 61% | 2651 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 47,268 psi | 86% | 2700 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% | 39,914 psi | 72% | 2513 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 39,407 psi | 72% | 2484 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 33,678 psi | 61% | 2497 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 37,768 psi | 69% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 27,267 psi | 49% | 2349 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,395 psi | 79% | 2621 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 37,086 psi | 67% | 2487 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 43,932 psi | 80% | 2694 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,411 psi | 82% | 2625 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,571 psi | 83% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,436 psi | 72% | 2664 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 43,584 psi | 79% | 2694 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,463 psi | 66% | 2507 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,175 psi | 71% | 2566 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 28,500 psi | 52% | 2365 fps | 95.2% |
| Alliant Reloder-17 | 45.6 gr | 80% | 31,531 psi | 57% | 2490 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 43,004 psi | 78% | 2687 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,194 psi | 48% | 2339 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 92% | 31,560 psi | 57% | 2552 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,699 psi | 77% | 2635 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 36,042 psi | 65% | 2513 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 39,552 psi | 72% | 2530 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,251 psi | 80% | 2654 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,970 psi | 67% | 2516 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 36,390 psi | 66% | 2559 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 42,641 psi | 77% | 2631 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,743 psi | 79% | 2631 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,976 psi | 47% | 2270 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,813 psi | 72% | 2615 fps | 99.9% |
| Hodgdon Superformance | 53 gr | 88% | 38,595 psi | 70% | 2625 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 48% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,076 psi | 76% | 2589 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 43,511 psi | 79% | 2621 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,928 psi | 71% | 2516 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,394 psi | 75% | 2533 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 39,610 psi | 72% | 2559 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 38,870 psi | 71% | 2516 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 28,660 psi | 52% | 2365 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,089 psi | 73% | 2595 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 45,411 psi | 82% | 2625 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,554 psi | 77% | 2602 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,729 psi | 79% | 2559 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 38,812 psi | 70% | 2520 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 31,836 psi | 58% | 2369 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 36,230 psi | 66% | 2493 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 42,627 psi | 77% | 2575 fps | 100% |
| Norma 202 | <<locked>> | 80% | 42,772 psi | 78% | 2579 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,537 psi | 70% | 2556 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 44,686 psi | 81% | 2694 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 36,608 psi | 66% | 2638 fps | 95% |
| Norma URP | <<locked>> | 80% | 28,253 psi | 51% | 2359 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 38,101 psi | 69% | 2572 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 33,446 psi | 61% | 2497 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 45,266 psi | 82% | 2638 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,788 psi | 81% | 2657 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 48% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,463 psi | 68% | 2500 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,133 psi | 75% | 2671 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,562 psi | 61% | 2549 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 29,370 psi | 53% | 2421 fps | 95.4% |
| ReloadSwiss RS 70 | 48.6 gr | 84% | 31,734 psi | 58% | 2480 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 46,673 psi | 85% | 2608 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,654 psi | 74% | 2533 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,040 psi | 62% | 2461 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 41,452 psi | 75% | 2664 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 39,552 psi | 72% | 2530 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 31,836 psi | 58% | 2369 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,554 psi | 77% | 2602 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,812 psi | 70% | 2520 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 36,230 psi | 66% | 2493 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,983 psi | 63% | 2513 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,613 psi | 79% | 2615 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,076 psi | 76% | 2598 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,121 psi | 80% | 2520 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,622 psi | 66% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 37,492 psi | 68% | 2461 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 43,642 psi | 79% | 2523 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,468 psi | 79% | 2612 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 34,853 psi | 63% | 2464 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 25,251 psi | 46% | 2313 fps | 97.4% |
| Somchem S385 | <<locked>> | 96% | 39,320 psi | 71% | 2598 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 44,396 psi | 81% | 2510 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,016 psi | 73% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,654 psi | 74% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,156 psi | 60% | 2405 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 29,370 psi | 53% | 2356 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 45,542 psi | 83% | 2621 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,102 psi | 71% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 28,892 psi | 52% | 2362 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 25,991 psi | 47% | 2356 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,486 psi | 54% | 2339 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 45,208 psi | 82% | 2671 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 36,579 psi | 66% | 2562 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 24,526 psi | 45% | 2349 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,321 psi | 75% | 2602 fps | 99.8% |
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 | Remington PSP Core-Lokt. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,838 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,838 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 61–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 180gr | Remington PSP Core-Lokt 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.