Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 200gr | Sako Hammerhead 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-16 and Hodgdon Superformance.
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 2495 | <<locked>> | 84% | 47,950 psi | 87% | 2477 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,079 psi | 85% | 2484 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,452 psi | 75% | 2510 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 48,341 psi | 88% | 2530 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 47,108 psi | 85% | 2612 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 48,675 psi | 88% | 2556 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 49,429 psi | 90% | 2559 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,327 psi | 90% | 2648 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 47,616 psi | 86% | 2667 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,994 psi | 89% | 2648 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 49,342 psi | 90% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,806 psi | 90% | 2595 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 49,008 psi | 89% | 2667 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 49,385 psi | 90% | 2694 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,269 psi | 88% | 2638 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 42,163 psi | 77% | 2585 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,537 psi | 72% | 2536 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,056 psi | 64% | 2457 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,135 psi | 80% | 2697 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,790 psi | 87% | 2569 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 49,719 psi | 90% | 2592 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 42,163 psi | 77% | 2585 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 47,123 psi | 86% | 2526 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 47,340 psi | 86% | 2559 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 46,702 psi | 85% | 2612 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 47,921 psi | 87% | 2579 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 49,197 psi | 89% | 2566 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 48,544 psi | 88% | 2595 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 48,167 psi | 87% | 2598 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 46,644 psi | 85% | 2641 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 65% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 46,992 psi | 85% | 2520 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 48,950 psi | 89% | 2539 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,994 psi | 89% | 2539 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 48,849 psi | 89% | 2523 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 47,224 psi | 86% | 2552 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 48,834 psi | 89% | 2556 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 48,167 psi | 87% | 2608 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 48,066 psi | 87% | 2579 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 49,284 psi | 89% | 2585 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 82% | 48,051 psi | 87% | 2530 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 48,443 psi | 88% | 2487 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 48,921 psi | 89% | 2536 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 48,124 psi | 87% | 2549 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 48,834 psi | 89% | 2582 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 34,345 psi | 62% | 2375 fps | 97% |
| Norma 201 | <<locked>> | 82% | 47,500 psi | 86% | 2503 fps | 100% |
| Norma 202 | <<locked>> | 82% | 48,066 psi | 87% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 86% | 49,037 psi | 89% | 2585 fps | 100% |
| Norma 204 | <<locked>> | 94% | 46,992 psi | 85% | 2592 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 44,295 psi | 80% | 2661 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 49,806 psi | 90% | 2648 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 49,284 psi | 89% | 2608 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 48,588 psi | 88% | 2651 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 66% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 47,819 psi | 87% | 2546 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 49,850 psi | 90% | 2654 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,516 psi | 90% | 2690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 46,818 psi | 85% | 2635 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 46,717 psi | 85% | 2664 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 48,051 psi | 87% | 2503 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 49,559 psi | 90% | 2582 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 47,834 psi | 87% | 2569 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 46,876 psi | 85% | 2621 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 47,123 psi | 86% | 2526 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 48,124 psi | 87% | 2549 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 48,051 psi | 87% | 2530 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 48,921 psi | 89% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 48,834 psi | 89% | 2582 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 47,906 psi | 87% | 2598 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,153 psi | 89% | 2556 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 47,094 psi | 85% | 2533 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,907 psi | 89% | 2441 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 49,095 psi | 89% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 48,037 psi | 87% | 2503 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 46,456 psi | 84% | 2615 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 48,385 psi | 88% | 2441 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 48,675 psi | 88% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 47,181 psi | 86% | 2539 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 47,950 psi | 87% | 2651 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,659 psi | 86% | 2602 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 49,211 psi | 89% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 47,761 psi | 87% | 2467 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 48,298 psi | 88% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 48,037 psi | 87% | 2516 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 48,863 psi | 89% | 2595 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 41,104 psi | 75% | 2477 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 86% | 49,559 psi | 90% | 2526 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 48,109 psi | 87% | 2608 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,584 psi | 79% | 2605 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 48,965 psi | 89% | 2575 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 46,992 psi | 85% | 2615 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,447 psi | 64% | 2572 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 49,763 psi | 90% | 2582 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 44,730 psi | 81% | 2539 fps | 96.6% |
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% | 42,279 psi | 77% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,321 psi | 75% | 2385 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 29,414 psi | 53% | 2267 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 40,001 psi | 73% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,240 psi | 53% | 2270 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 45,614 psi | 83% | 2510 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 38,870 psi | 71% | 2382 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 40,872 psi | 74% | 2497 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,379 psi | 75% | 2559 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 40,466 psi | 73% | 2497 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,479 psi | 70% | 2402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,307 psi | 75% | 2461 fps | 99.8% |
| Alliant Reloder-16 | 40.8 gr | 80% | 29,950 psi | 54% | 2283 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,286 psi | 60% | 2398 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 39,958 psi | 73% | 2490 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 39,494 psi | 72% | 2533 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 23,018 psi | 42% | 2113 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 96% | 31,053 psi | 56% | 2356 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 27,412 psi | 50% | 2310 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,788 psi | 81% | 2523 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 38,305 psi | 70% | 2411 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 39,494 psi | 72% | 2533 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 36,854 psi | 67% | 2339 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 38,928 psi | 71% | 2415 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 33,823 psi | 61% | 2365 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 37,043 psi | 67% | 2379 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 46,021 psi | 84% | 2516 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,383 psi | 50% | 2188 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,105 psi | 76% | 2503 fps | 100% |
| Hodgdon Superformance | 48.8 gr | 84% | 35,462 psi | 64% | 2421 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 48% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,222 psi | 80% | 2477 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 45,905 psi | 83% | 2497 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,828 psi | 74% | 2408 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,149 psi | 78% | 2428 fps | 97.8% |
| IMR 4350 | <<locked>> | 84% | 34,679 psi | 63% | 2320 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 35,969 psi | 65% | 2320 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 28,543 psi | 52% | 2234 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 42,293 psi | 77% | 2487 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 46,427 psi | 84% | 2539 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 80% | 44,918 psi | 82% | 2484 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,614 psi | 83% | 2444 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 40,814 psi | 74% | 2408 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 33,475 psi | 61% | 2277 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 33,765 psi | 61% | 2306 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 30,414 psi | 55% | 2290 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,730 psi | 81% | 2461 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,991 psi | 82% | 2461 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,654 psi | 74% | 2448 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 41,350 psi | 75% | 2493 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 34,055 psi | 62% | 2444 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 29,936 psi | 54% | 2277 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 40,118 psi | 73% | 2464 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 31,198 psi | 57% | 2310 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 49% | 1437 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,378 psi | 71% | 2398 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,642 psi | 79% | 2559 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,462 psi | 64% | 2451 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,080 psi | 53% | 2283 fps | 96.5% |
| ReloadSwiss RS 70 | 44.6 gr | 80% | 29,211 psi | 53% | 2283 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 42,583 psi | 77% | 2418 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 36,085 psi | 65% | 2362 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 96% | 45,020 psi | 82% | 2523 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 38,696 psi | 70% | 2474 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 36,854 psi | 67% | 2339 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,475 psi | 61% | 2277 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,918 psi | 82% | 2484 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,814 psi | 74% | 2408 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 33,765 psi | 61% | 2306 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,912 psi | 67% | 2411 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,977 psi | 83% | 2507 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,135 psi | 80% | 2487 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,948 psi | 83% | 2398 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,290 psi | 69% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 32,489 psi | 59% | 2224 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 38,363 psi | 70% | 2467 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 45,658 psi | 83% | 2405 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,600 psi | 83% | 2497 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,782 psi | 67% | 2362 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 26,760 psi | 49% | 2234 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 34,432 psi | 62% | 2362 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 46,311 psi | 84% | 2385 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,119 psi | 76% | 2385 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,757 psi | 78% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,041 psi | 64% | 2303 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 31,125 psi | 56% | 2270 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 36,230 psi | 66% | 2382 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 40,988 psi | 74% | 2402 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 30,545 psi | 55% | 2274 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 24,395 psi | 44% | 2178 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,908 psi | 56% | 2251 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 33,823 psi | 61% | 2365 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 22,858 psi | 41% | 2178 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,613 psi | 79% | 2490 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 38,972 psi | 71% | 2438 fps | 95% |
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 | 200gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,697 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 200.0 gr projectile in 0.308" calls for a 1:14.0 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, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for 7.5 x 55 Swiss with the .308 | 200gr | Sako Hammerhead 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.