Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 200gr | Berger Hybrid Target bullet and 97 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 2015 | <<locked>> | 82% | 49,705 psi | 90% | 2425 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 47,776 psi | 87% | 2454 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 49,458 psi | 90% | 2513 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,514 psi | 86% | 2454 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,898 psi | 69% | 2421 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 47,964 psi | 87% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 49,835 psi | 90% | 2621 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 48,892 psi | 89% | 2533 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 49,661 psi | 90% | 2530 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 46,079 psi | 84% | 2556 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,080 psi | 87% | 2484 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 48,327 psi | 88% | 2454 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,630 psi | 86% | 2635 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 49,443 psi | 90% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 49,835 psi | 90% | 2569 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,776 psi | 89% | 2631 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 49,211 psi | 89% | 2661 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 45,034 psi | 82% | 2549 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,738 psi | 67% | 2454 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,698 psi | 74% | 2598 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,037 psi | 87% | 2543 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 49,559 psi | 90% | 2562 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 46,949 psi | 85% | 2490 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 84% | 49,734 psi | 90% | 2556 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 47,543 psi | 86% | 2533 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 96% | 49,748 psi | 90% | 2625 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 92% | 47,834 psi | 87% | 2543 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 49,313 psi | 89% | 2539 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,906 psi | 87% | 2556 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 47,921 psi | 87% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 46,760 psi | 85% | 2605 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,230 psi | 64% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,195 psi | 86% | 2493 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 49,008 psi | 89% | 2516 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,066 psi | 89% | 2510 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,182 psi | 89% | 2493 fps | 98.4% |
| IMR 4350 | <<locked>> | 96% | 47,021 psi | 85% | 2516 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,834 psi | 89% | 2520 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 47,442 psi | 86% | 2569 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 47,935 psi | 87% | 2549 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 48,080 psi | 87% | 2484 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 47,877 psi | 87% | 2503 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,704 psi | 88% | 2461 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 48,863 psi | 89% | 2507 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 48,240 psi | 88% | 2520 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 48,559 psi | 88% | 2546 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 47,848 psi | 87% | 2480 fps | 100% |
| Norma 202 | <<locked>> | 84% | 48,124 psi | 87% | 2480 fps | 100% |
| Norma 203B | <<locked>> | 88% | 49,095 psi | 89% | 2556 fps | 100% |
| Norma 204 | <<locked>> | 96% | 47,108 psi | 85% | 2559 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 40,857 psi | 74% | 2559 fps | 97% |
| Norma URP | <<locked>> | 98% | 49,385 psi | 90% | 2615 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 49,037 psi | 89% | 2579 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 48,341 psi | 88% | 2615 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 47,819 psi | 87% | 2500 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 47,210 psi | 86% | 2516 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,911 psi | 65% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,964 psi | 87% | 2516 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 49,792 psi | 90% | 2625 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 49,211 psi | 89% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 49,356 psi | 90% | 2644 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 49,763 psi | 90% | 2674 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 49,110 psi | 89% | 2461 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,153 psi | 87% | 2477 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 49,414 psi | 90% | 2552 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 43,410 psi | 79% | 2526 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 46,949 psi | 85% | 2490 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,240 psi | 88% | 2520 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 47,877 psi | 87% | 2503 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,863 psi | 89% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 48,559 psi | 88% | 2546 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 47,630 psi | 86% | 2566 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,487 psi | 90% | 2530 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 47,152 psi | 86% | 2503 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,327 psi | 90% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,240 psi | 89% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,182 psi | 87% | 2470 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 43,047 psi | 78% | 2523 fps | 96% |
| Somchem S335 | <<locked>> | 84% | 48,892 psi | 89% | 2421 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 49,008 psi | 89% | 2516 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 46,920 psi | 85% | 2510 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,978 psi | 85% | 2612 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 43,845 psi | 80% | 2513 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 49,574 psi | 90% | 2402 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 47,601 psi | 86% | 2441 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,544 psi | 88% | 2461 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,095 psi | 87% | 2490 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 48,544 psi | 88% | 2559 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 48,080 psi | 87% | 2477 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 49,864 psi | 90% | 2507 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 47,819 psi | 87% | 2575 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,929 psi | 72% | 2523 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 48,805 psi | 89% | 2543 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,790 psi | 87% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 49,748 psi | 90% | 2625 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,851 psi | 60% | 2470 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 49,719 psi | 90% | 2556 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% | 46,876 psi | 85% | 2388 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,320 psi | 71% | 2333 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,079 psi | 84% | 2467 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 39,059 psi | 71% | 2313 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 30,995 psi | 56% | 2280 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 37,217 psi | 68% | 2333 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 26,977 psi | 49% | 2192 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 43,062 psi | 78% | 2441 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,550 psi | 66% | 2306 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 98% | 43,482 psi | 79% | 2510 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,078 psi | 82% | 2438 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,136 psi | 82% | 2411 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,015 psi | 71% | 2480 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,984 psi | 65% | 2329 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,856 psi | 71% | 2388 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 28,282 psi | 51% | 2208 fps | 95.8% |
| Alliant Reloder-17 | 41.2 gr | 80% | 31,053 psi | 56% | 2316 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 98% | 42,322 psi | 77% | 2500 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 24,265 psi | 44% | 2129 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 90% | 29,051 psi | 53% | 2326 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,105 psi | 76% | 2448 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 35,578 psi | 65% | 2336 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 36,840 psi | 67% | 2310 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,743 psi | 79% | 2467 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,390 psi | 66% | 2339 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 35,824 psi | 65% | 2379 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 39,523 psi | 72% | 2398 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,439 psi | 79% | 2448 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,730 psi | 47% | 2116 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,131 psi | 71% | 2428 fps | 99.9% |
| Hodgdon Superformance | 47.9 gr | 88% | 37,927 psi | 69% | 2441 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 48% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,785 psi | 76% | 2408 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 43,018 psi | 78% | 2431 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,363 psi | 70% | 2336 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,988 psi | 74% | 2356 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 36,811 psi | 67% | 2336 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 36,143 psi | 66% | 2293 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 26,542 psi | 48% | 2156 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,769 psi | 72% | 2415 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 45,078 psi | 82% | 2438 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,974 psi | 76% | 2415 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,192 psi | 78% | 2375 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 38,290 psi | 69% | 2339 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 31,386 psi | 57% | 2201 fps | 95.4% |
| Lovex S070 | <<locked>> | 84% | 33,591 psi | 61% | 2274 fps | 95% |
| Norma 201 | <<locked>> | 80% | 42,119 psi | 76% | 2392 fps | 100% |
| Norma 202 | <<locked>> | 80% | 42,308 psi | 77% | 2395 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,218 psi | 69% | 2379 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 41,379 psi | 75% | 2461 fps | 95% |
| Norma MRP | <<locked>> | 96% | 35,998 psi | 65% | 2457 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 27,949 psi | 51% | 2198 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 37,666 psi | 68% | 2392 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 33,011 psi | 60% | 2326 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 44,991 psi | 82% | 2454 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,353 psi | 80% | 2470 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,672 psi | 48% | 1404 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,072 psi | 67% | 2326 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,553 psi | 74% | 2480 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,040 psi | 60% | 2369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 27,108 psi | 49% | 2205 fps | 95% |
| ReloadSwiss RS 70 | 43.9 gr | 84% | 31,227 psi | 57% | 2306 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,079 psi | 84% | 2418 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,219 psi | 73% | 2352 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 33,605 psi | 61% | 2290 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 98% | 40,901 psi | 74% | 2484 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 36,840 psi | 67% | 2310 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 31,386 psi | 57% | 2201 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,974 psi | 76% | 2415 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,290 psi | 69% | 2339 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 33,591 psi | 61% | 2274 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,534 psi | 63% | 2336 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,236 psi | 78% | 2431 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,568 psi | 75% | 2415 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,787 psi | 79% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,347 psi | 66% | 2228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 34,476 psi | 63% | 2241 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 40,567 psi | 74% | 2477 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 43,091 psi | 78% | 2339 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,888 psi | 78% | 2425 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 34,403 psi | 62% | 2290 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 24,990 psi | 45% | 2156 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 36,260 psi | 66% | 2372 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 44,092 psi | 80% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,668 psi | 72% | 2326 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,263 psi | 73% | 2339 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,822 psi | 60% | 2234 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 29,124 psi | 53% | 2195 fps | 96% |
| Vihtavuori N530 | <<locked>> | 80% | 45,049 psi | 82% | 2434 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,479 psi | 70% | 2333 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 28,413 psi | 52% | 2198 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 25,599 psi | 46% | 2195 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,109 psi | 53% | 2175 fps | 98% |
| Winchester 748 | <<locked>> | 80% | 44,454 psi | 81% | 2477 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 33,823 psi | 61% | 2336 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 90% | 24,091 psi | 44% | 2192 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,785 psi | 74% | 2418 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 115 powders for 7.5 x 55 Swiss loaded with the .308 | 200gr | Berger Hybrid Target. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,674 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,674 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 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 200.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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 | 200gr | Berger Hybrid Target they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.