Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 210gr | Berger LRBTHP bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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>> | 84% | 47,210 psi | 86% | 2382 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,414 psi | 90% | 2431 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,379 psi | 73% | 2408 fps | 98.5% |
| Accurate 4064 | <<locked>> | 86% | 47,529 psi | 86% | 2431 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,371 psi | 90% | 2556 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 47,805 psi | 87% | 2454 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 48,820 psi | 89% | 2461 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 48,341 psi | 88% | 2539 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 46,673 psi | 85% | 2559 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,022 psi | 87% | 2543 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 48,762 psi | 88% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,182 psi | 89% | 2497 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 48,124 psi | 87% | 2562 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 48,660 psi | 88% | 2592 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 47,311 psi | 86% | 2536 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 41,118 psi | 75% | 2480 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,725 psi | 70% | 2438 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 34,316 psi | 62% | 2359 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,062 psi | 78% | 2592 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,094 psi | 85% | 2470 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 48,602 psi | 88% | 2490 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 41,118 psi | 75% | 2480 fps | 96.3% |
| Bofors RP7 | <<locked>> | 92% | 49,226 psi | 89% | 2470 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,791 psi | 89% | 2480 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 49,661 psi | 90% | 2503 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 48,878 psi | 89% | 2556 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 46,876 psi | 85% | 2474 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 48,240 psi | 88% | 2464 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 47,340 psi | 86% | 2490 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 47,065 psi | 85% | 2493 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 49,168 psi | 89% | 2592 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,476 psi | 64% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,458 psi | 90% | 2467 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 48,022 psi | 87% | 2438 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,211 psi | 87% | 2441 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 48,225 psi | 88% | 2425 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 49,400 psi | 90% | 2500 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,979 psi | 87% | 2454 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 47,007 psi | 85% | 2507 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 47,282 psi | 86% | 2480 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 48,269 psi | 88% | 2480 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 82% | 46,963 psi | 85% | 2428 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 47,718 psi | 87% | 2388 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 48,124 psi | 87% | 2438 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 47,543 psi | 86% | 2451 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 47,906 psi | 87% | 2480 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 33,591 psi | 61% | 2283 fps | 96.9% |
| Norma 201 | <<locked>> | 84% | 49,850 psi | 90% | 2448 fps | 100% |
| Norma 202 | <<locked>> | 82% | 47,079 psi | 85% | 2402 fps | 100% |
| Norma 203B | <<locked>> | 86% | 48,414 psi | 88% | 2487 fps | 100% |
| Norma 204 | <<locked>> | 96% | 49,443 psi | 90% | 2543 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 43,105 psi | 78% | 2549 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 48,878 psi | 89% | 2546 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 48,457 psi | 88% | 2510 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 47,805 psi | 87% | 2549 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 49,559 psi | 90% | 2490 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 66% | 1542 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 46,963 psi | 85% | 2444 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,907 psi | 89% | 2549 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 48,298 psi | 88% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 49,023 psi | 89% | 2579 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,747 psi | 88% | 2605 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 47,369 psi | 86% | 2405 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 48,820 psi | 89% | 2484 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 46,920 psi | 85% | 2467 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 45,774 psi | 83% | 2513 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 49,226 psi | 89% | 2470 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 47,543 psi | 86% | 2451 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 46,963 psi | 85% | 2428 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 48,124 psi | 87% | 2438 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 47,906 psi | 87% | 2480 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 47,079 psi | 85% | 2497 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 48,443 psi | 88% | 2457 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 49,124 psi | 89% | 2474 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,254 psi | 88% | 2343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 48,283 psi | 88% | 2349 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 47,094 psi | 85% | 2402 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 45,368 psi | 82% | 2510 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 47,674 psi | 87% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,979 psi | 87% | 2444 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 49,313 psi | 89% | 2484 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,835 psi | 90% | 2585 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,398 psi | 84% | 2497 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 48,602 psi | 88% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 46,891 psi | 85% | 2369 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 47,471 psi | 86% | 2385 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 47,355 psi | 86% | 2421 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 47,935 psi | 87% | 2493 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 40,277 psi | 73% | 2379 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 86% | 48,849 psi | 89% | 2431 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 47,036 psi | 85% | 2503 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,351 psi | 77% | 2500 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 48,095 psi | 87% | 2474 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 49,182 psi | 89% | 2559 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,650 psi | 63% | 2467 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,747 psi | 88% | 2480 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 43,714 psi | 79% | 2438 fps | 96.5% |
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% | 41,626 psi | 76% | 2306 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,669 psi | 74% | 2290 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 28,906 psi | 52% | 2182 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 39,392 psi | 71% | 2310 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 28,631 psi | 52% | 2182 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 44,875 psi | 81% | 2411 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 38,348 psi | 70% | 2290 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 40,132 psi | 73% | 2398 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,799 psi | 74% | 2461 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 39,740 psi | 72% | 2398 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,956 psi | 69% | 2310 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,611 psi | 74% | 2362 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,544 psi | 54% | 2195 fps | 97.2% |
| Alliant Reloder-17 | 41.5 gr | 80% | 32,735 psi | 59% | 2306 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 39,247 psi | 71% | 2392 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 38,624 psi | 70% | 2431 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 22,640 psi | 41% | 2031 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 96% | 30,560 psi | 55% | 2264 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 26,948 psi | 49% | 2221 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,961 psi | 80% | 2421 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 37,362 psi | 68% | 2313 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 38,624 psi | 70% | 2431 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 36,289 psi | 66% | 2247 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,774 psi | 83% | 2438 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,377 psi | 70% | 2323 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 33,257 psi | 60% | 2274 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 84% | 38,754 psi | 70% | 2333 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,324 psi | 82% | 2418 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,948 psi | 49% | 2103 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,336 psi | 75% | 2405 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 34,737 psi | 63% | 2326 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 48% | 1342 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,511 psi | 79% | 2379 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 45,165 psi | 82% | 2398 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,277 psi | 73% | 2313 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,569 psi | 77% | 2333 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 36,303 psi | 66% | 2277 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 35,346 psi | 64% | 2228 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 28,123 psi | 51% | 2149 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 41,611 psi | 76% | 2388 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 45,368 psi | 82% | 2434 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 44,005 psi | 80% | 2385 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,846 psi | 81% | 2346 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 39,958 psi | 73% | 2310 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 33,054 psi | 60% | 2192 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 33,228 psi | 60% | 2215 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 29,501 psi | 54% | 2195 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,150 psi | 80% | 2365 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,425 psi | 81% | 2365 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,987 psi | 73% | 2352 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 40,538 psi | 74% | 2395 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 33,272 psi | 60% | 2346 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 29,312 psi | 53% | 2185 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 39,479 psi | 72% | 2369 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 30,487 psi | 55% | 2215 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,267 psi | 84% | 2441 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 49% | 1378 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,682 psi | 70% | 2303 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,728 psi | 78% | 2457 fps | 99.9% |
| ReloadSwiss RS 60 | 41.5 gr | 80% | 34,824 psi | 63% | 2356 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 28,529 psi | 52% | 2195 fps | 96.5% |
| ReloadSwiss RS 70 | 42.1 gr | 80% | 28,834 psi | 52% | 2198 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 41,959 psi | 76% | 2323 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 35,346 psi | 64% | 2267 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 96% | 44,295 psi | 80% | 2425 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 37,913 psi | 69% | 2375 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 36,289 psi | 66% | 2247 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,054 psi | 60% | 2192 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,005 psi | 80% | 2385 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,958 psi | 73% | 2310 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 33,228 psi | 60% | 2215 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,158 psi | 66% | 2313 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,150 psi | 82% | 2408 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,366 psi | 79% | 2388 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,498 psi | 83% | 2306 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,884 psi | 69% | 2198 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 34,113 psi | 62% | 2182 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 37,594 psi | 68% | 2369 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 45,107 psi | 82% | 2310 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,744 psi | 81% | 2398 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,245 psi | 66% | 2274 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 26,252 psi | 48% | 2146 fps | 98.9% |
| Somchem S385 | <<locked>> | 92% | 35,781 psi | 65% | 2313 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 45,847 psi | 83% | 2293 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,553 psi | 75% | 2293 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,032 psi | 76% | 2306 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,389 psi | 62% | 2211 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 30,545 psi | 55% | 2182 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 98% | 37,782 psi | 69% | 2333 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 40,437 psi | 73% | 2310 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 30,052 psi | 55% | 2188 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 23,917 psi | 43% | 2093 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,356 psi | 55% | 2162 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 33,257 psi | 60% | 2274 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 22,524 psi | 41% | 2096 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,931 psi | 78% | 2395 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 40,886 psi | 74% | 2388 fps | 95.7% |
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 97 powders for 7.5 x 55 Swiss loaded with the .308 | 210gr | Berger LRBTHP. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,503 fps to 2,605 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 210.0 gr projectile in 0.308" calls for a 1:11.5 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. Alliant Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for 7.5 x 55 Swiss with the .308 | 210gr | Berger LRBTHP 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.