Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 185gr | Berger Hybrid Target 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 60, 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 2015 | <<locked>> | 82% | 48,037 psi | 87% | 2520 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 48,733 psi | 88% | 2582 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 47,282 psi | 86% | 2598 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,704 psi | 88% | 2575 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 35,839 psi | 65% | 2480 fps | 96.1% |
| Accurate 4064 | <<locked>> | 90% | 48,762 psi | 88% | 2628 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 47,413 psi | 86% | 2700 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 47,007 psi | 85% | 2615 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 48,008 psi | 87% | 2615 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 49,327 psi | 90% | 2615 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 49,269 psi | 89% | 2585 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 48,979 psi | 89% | 2769 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 47,224 psi | 86% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 48,008 psi | 87% | 2654 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,705 psi | 90% | 2756 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 47,166 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,172 psi | 64% | 2516 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,812 psi | 70% | 2661 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 49,371 psi | 90% | 2674 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 47,369 psi | 86% | 2648 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 48,109 psi | 87% | 2615 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 48,095 psi | 87% | 2549 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 47,776 psi | 87% | 2641 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 49,313 psi | 89% | 2730 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 48,631 psi | 88% | 2657 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 96% | 47,587 psi | 86% | 2703 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 94% | 48,733 psi | 88% | 2664 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 84% | 47,456 psi | 86% | 2625 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,905 psi | 83% | 2638 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 48,849 psi | 89% | 2697 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 47,834 psi | 87% | 2726 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 64% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 48,370 psi | 88% | 2621 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 49,835 psi | 90% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 47,456 psi | 86% | 2595 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,645 psi | 86% | 2572 fps | 97.5% |
| IMR 4350 | <<locked>> | 98% | 47,877 psi | 87% | 2635 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,036 psi | 85% | 2598 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,341 psi | 88% | 2697 fps | 99.7% |
| IMR 4895 | <<locked>> | 88% | 49,197 psi | 89% | 2684 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 49,327 psi | 90% | 2615 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 49,023 psi | 89% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 47,094 psi | 85% | 2546 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 47,181 psi | 86% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 48,965 psi | 89% | 2638 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 49,690 psi | 90% | 2671 fps | 98.2% |
| Norma 201 | <<locked>> | 86% | 48,776 psi | 89% | 2608 fps | 100% |
| Norma 202 | <<locked>> | 86% | 49,284 psi | 89% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 88% | 47,239 psi | 86% | 2641 fps | 99.9% |
| Norma 204 | <<locked>> | 98% | 48,167 psi | 87% | 2677 fps | 95.9% |
| Norma URP | <<locked>> | 98% | 47,253 psi | 86% | 2694 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 47,108 psi | 85% | 2664 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,530 psi | 90% | 2743 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 49,342 psi | 90% | 2631 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 84% | 48,704 psi | 88% | 2651 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 49,864 psi | 90% | 2612 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 65% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 49,052 psi | 89% | 2638 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 47,543 psi | 86% | 2710 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 47,268 psi | 86% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 47,123 psi | 86% | 2726 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 47,558 psi | 86% | 2746 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 82% | 47,253 psi | 86% | 2546 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 49,313 psi | 89% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 47,268 psi | 86% | 2638 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 48,109 psi | 87% | 2615 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 48,965 psi | 89% | 2638 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 49,023 psi | 89% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 47,181 psi | 86% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 49,690 psi | 90% | 2671 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 48,733 psi | 88% | 2697 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 47,268 psi | 86% | 2605 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 48,370 psi | 88% | 2635 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 47,732 psi | 87% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 47,355 psi | 86% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 49,197 psi | 89% | 2592 fps | 97.8% |
| Somchem S335 | <<locked>> | 86% | 49,850 psi | 90% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 47,079 psi | 85% | 2602 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 48,008 psi | 87% | 2638 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,773 psi | 81% | 2694 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 42,003 psi | 76% | 2582 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 84% | 47,921 psi | 87% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 48,733 psi | 88% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 49,617 psi | 90% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 49,124 psi | 89% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 49,617 psi | 90% | 2687 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 84% | 49,356 psi | 90% | 2608 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 47,703 psi | 87% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 48,718 psi | 88% | 2697 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,666 psi | 68% | 2585 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 47,065 psi | 85% | 2625 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 48,675 psi | 88% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 47,587 psi | 86% | 2703 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,502 psi | 57% | 2520 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 47,747 psi | 87% | 2638 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 2015 | <<locked>> | 80% | 45,078 psi | 82% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,710 psi | 68% | 2415 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,063 psi | 80% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 42,815 psi | 78% | 2477 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 33,460 psi | 61% | 2431 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 35,636 psi | 65% | 2411 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 29,385 psi | 53% | 2349 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 41,249 psi | 75% | 2516 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,331 psi | 64% | 2382 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,265 psi | 79% | 2520 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 43,018 psi | 78% | 2500 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,405 psi | 68% | 2549 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,592 psi | 63% | 2405 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,101 psi | 67% | 2457 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 82% | 28,834 psi | 52% | 2313 fps | 95% |
| Alliant Reloder-17 | 42.2 gr | 80% | 29,776 psi | 54% | 2375 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 26,194 psi | 48% | 2274 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 31,589 psi | 57% | 2484 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,306 psi | 73% | 2523 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 34,011 psi | 62% | 2405 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 40,176 psi | 73% | 2474 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,252 psi | 82% | 2507 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,872 psi | 76% | 2546 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,992 psi | 83% | 2677 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 34,925 psi | 63% | 2405 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 36,593 psi | 66% | 2493 fps | 95% |
| Hodgdon H4350 | <<locked>> | 90% | 43,105 psi | 78% | 2566 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 41,597 psi | 75% | 2526 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 26,208 psi | 48% | 2218 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,449 psi | 68% | 2500 fps | 99.6% |
| Hodgdon Superformance | 51.3 gr | 92% | 41,742 psi | 76% | 2615 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 48% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,059 psi | 73% | 2484 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 41,060 psi | 75% | 2516 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,043 psi | 67% | 2411 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 39,436 psi | 72% | 2425 fps | 95.6% |
| IMR 4350 | <<locked>> | 92% | 39,842 psi | 72% | 2493 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 39,421 psi | 72% | 2461 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 28,834 psi | 52% | 2313 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,956 psi | 69% | 2487 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 43,265 psi | 79% | 2520 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,161 psi | 73% | 2497 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,901 psi | 76% | 2457 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 36,898 psi | 67% | 2418 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 34,026 psi | 62% | 2359 fps | 95.5% |
| Lovex S070 | <<locked>> | 88% | 36,477 psi | 66% | 2434 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,654 psi | 74% | 2474 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 40,785 psi | 74% | 2480 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,463 psi | 66% | 2448 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 45,223 psi | 82% | 2628 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 30,240 psi | 55% | 2352 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,027 psi | 65% | 2461 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 35,998 psi | 65% | 2490 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,265 psi | 79% | 2530 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,496 psi | 77% | 2549 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,992 psi | 85% | 2569 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,368 psi | 48% | 1470 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 35,592 psi | 65% | 2392 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,667 psi | 70% | 2556 fps | 98.9% |
| ReloadSwiss RS 60 | 42.2 gr | 80% | 31,705 psi | 58% | 2438 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 29,486 psi | 54% | 2362 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 32,053 psi | 58% | 2418 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 44,411 psi | 81% | 2503 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,638 psi | 70% | 2428 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 31,937 psi | 58% | 2352 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 40,176 psi | 73% | 2474 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 34,026 psi | 62% | 2359 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,161 psi | 73% | 2497 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,898 psi | 67% | 2418 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 36,477 psi | 66% | 2434 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,054 psi | 60% | 2402 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,423 psi | 75% | 2503 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,958 psi | 73% | 2490 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,221 psi | 77% | 2425 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,911 psi | 63% | 2306 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 37,811 psi | 69% | 2402 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 41,713 psi | 76% | 2428 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,046 psi | 74% | 2500 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 33,069 psi | 60% | 2362 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 23,844 psi | 43% | 2205 fps | 96.3% |
| Somchem S385 | <<locked>> | 98% | 39,131 psi | 71% | 2530 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 42,453 psi | 77% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,913 psi | 69% | 2408 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,479 psi | 70% | 2415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,285 psi | 57% | 2300 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 29,791 psi | 54% | 2303 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 43,410 psi | 79% | 2516 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 36,985 psi | 67% | 2411 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 30,995 psi | 56% | 2359 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 27,557 psi | 50% | 2343 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,920 psi | 51% | 2234 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 42,554 psi | 77% | 2559 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 36,796 psi | 67% | 2500 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 26,063 psi | 47% | 2339 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,030 psi | 71% | 2493 fps | 99.5% |
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 | 185gr | Berger Hybrid Target. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,769 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,769 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 57–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 185gr | Berger Hybrid Target 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.