Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 208gr | Berger Long Range Hybrid Target bullet and 99 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% | 49,748 psi | 90% | 2359 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 47,776 psi | 87% | 2388 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 49,240 psi | 89% | 2444 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,485 psi | 86% | 2392 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,710 psi | 68% | 2356 fps | 97.6% |
| Accurate 4064 | <<locked>> | 88% | 47,761 psi | 87% | 2431 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 49,835 psi | 90% | 2556 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 48,559 psi | 88% | 2461 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 49,487 psi | 90% | 2461 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 46,180 psi | 84% | 2493 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 47,935 psi | 87% | 2415 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 48,066 psi | 87% | 2385 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,703 psi | 87% | 2569 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 49,298 psi | 89% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 49,719 psi | 90% | 2500 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,689 psi | 88% | 2562 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 49,327 psi | 90% | 2592 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 44,904 psi | 81% | 2484 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,753 psi | 67% | 2392 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 32,706 psi | 59% | 2306 fps | 96.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,582 psi | 74% | 2533 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,008 psi | 87% | 2477 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 49,574 psi | 90% | 2497 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 46,934 psi | 85% | 2425 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 49,763 psi | 90% | 2398 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 49,661 psi | 90% | 2487 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 47,181 psi | 86% | 2461 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 49,472 psi | 90% | 2556 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 47,601 psi | 86% | 2474 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 48,994 psi | 89% | 2467 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,877 psi | 87% | 2490 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 47,848 psi | 87% | 2500 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 46,499 psi | 84% | 2536 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,433 psi | 64% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,166 psi | 86% | 2428 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 48,834 psi | 89% | 2444 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,095 psi | 89% | 2444 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,284 psi | 89% | 2428 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 49,806 psi | 90% | 2493 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,805 psi | 89% | 2454 fps | 98.5% |
| IMR 4831 | <<locked>> | 98% | 47,413 psi | 86% | 2507 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 48,037 psi | 87% | 2484 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 47,935 psi | 87% | 2415 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 47,979 psi | 87% | 2438 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,878 psi | 89% | 2398 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 48,907 psi | 89% | 2441 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 47,993 psi | 87% | 2451 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 48,428 psi | 88% | 2480 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 47,761 psi | 87% | 2411 fps | 100% |
| Norma 202 | <<locked>> | 84% | 48,066 psi | 87% | 2411 fps | 100% |
| Norma 203B | <<locked>> | 88% | 48,936 psi | 89% | 2487 fps | 100% |
| Norma 204 | <<locked>> | 96% | 46,862 psi | 85% | 2490 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 40,857 psi | 74% | 2497 fps | 97.2% |
| Norma URP | <<locked>> | 98% | 49,371 psi | 90% | 2546 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 49,153 psi | 89% | 2513 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 48,225 psi | 88% | 2549 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 47,703 psi | 87% | 2434 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 47,355 psi | 86% | 2451 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,853 psi | 65% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,703 psi | 87% | 2444 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 49,661 psi | 90% | 2556 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 49,168 psi | 89% | 2589 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 49,255 psi | 89% | 2579 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 49,501 psi | 90% | 2605 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 49,110 psi | 89% | 2395 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,109 psi | 87% | 2408 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 49,400 psi | 90% | 2487 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 43,511 psi | 79% | 2464 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 92% | 46,934 psi | 85% | 2425 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,993 psi | 87% | 2451 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 47,979 psi | 87% | 2438 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,907 psi | 89% | 2441 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 48,428 psi | 88% | 2480 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 47,703 psi | 87% | 2500 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,110 psi | 89% | 2457 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 46,949 psi | 85% | 2434 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,385 psi | 90% | 2352 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,269 psi | 89% | 2356 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,037 psi | 87% | 2408 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 43,149 psi | 78% | 2461 fps | 96.3% |
| Somchem S335 | <<locked>> | 84% | 48,747 psi | 88% | 2356 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 48,979 psi | 89% | 2451 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 47,079 psi | 85% | 2448 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,079 psi | 85% | 2546 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 43,700 psi | 79% | 2448 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 84% | 49,617 psi | 90% | 2339 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 47,703 psi | 87% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,269 psi | 88% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,066 psi | 87% | 2425 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 48,414 psi | 88% | 2493 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 48,051 psi | 87% | 2411 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 49,472 psi | 90% | 2434 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 47,558 psi | 86% | 2503 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,668 psi | 72% | 2454 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 48,834 psi | 89% | 2477 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,543 psi | 86% | 2454 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 49,792 psi | 90% | 2562 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,808 psi | 60% | 2408 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 49,734 psi | 90% | 2487 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% | 46,818 psi | 85% | 2323 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,320 psi | 71% | 2270 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,035 psi | 84% | 2402 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 39,015 psi | 71% | 2251 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 30,850 psi | 56% | 2221 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 37,188 psi | 67% | 2270 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 26,861 psi | 49% | 2133 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 42,859 psi | 78% | 2372 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,521 psi | 66% | 2247 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 40,683 psi | 74% | 2395 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,875 psi | 81% | 2372 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,078 psi | 82% | 2346 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,827 psi | 70% | 2415 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,998 psi | 65% | 2267 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,653 psi | 70% | 2323 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 28,268 psi | 51% | 2152 fps | 96.1% |
| Alliant Reloder-17 | 39.8 gr | 80% | 31,038 psi | 56% | 2257 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 39,711 psi | 72% | 2388 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 24,265 psi | 44% | 2077 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 30,705 psi | 56% | 2254 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 29,037 psi | 53% | 2270 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,872 psi | 76% | 2382 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 35,636 psi | 65% | 2277 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 36,796 psi | 67% | 2247 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,992 psi | 85% | 2359 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,526 psi | 79% | 2398 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,535 psi | 66% | 2280 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 33,663 psi | 61% | 2274 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 86% | 39,378 psi | 71% | 2333 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,236 psi | 78% | 2382 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,701 psi | 47% | 2060 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,088 psi | 71% | 2362 fps | 100% |
| Hodgdon Superformance | 46.3 gr | 88% | 37,927 psi | 69% | 2382 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 48% | 1332 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,568 psi | 75% | 2339 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 42,975 psi | 78% | 2365 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,334 psi | 70% | 2274 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,857 psi | 74% | 2293 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 36,695 psi | 67% | 2274 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 36,013 psi | 65% | 2231 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 26,556 psi | 48% | 2103 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,566 psi | 72% | 2349 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,875 psi | 81% | 2372 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,901 psi | 76% | 2349 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,178 psi | 78% | 2313 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 38,247 psi | 69% | 2277 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 31,401 psi | 57% | 2146 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 33,547 psi | 61% | 2215 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 42,105 psi | 76% | 2326 fps | 100% |
| Norma 202 | <<locked>> | 80% | 42,293 psi | 77% | 2329 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,014 psi | 69% | 2313 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 41,321 psi | 75% | 2395 fps | 95.2% |
| Norma MRP | <<locked>> | 96% | 35,839 psi | 65% | 2395 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 27,804 psi | 50% | 2139 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 37,434 psi | 68% | 2326 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 32,938 psi | 60% | 2264 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,773 psi | 81% | 2388 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,106 psi | 80% | 2402 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,585 psi | 48% | 1362 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,014 psi | 67% | 2264 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,495 psi | 73% | 2415 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,025 psi | 60% | 2310 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 27,108 psi | 49% | 2152 fps | 95.2% |
| ReloadSwiss RS 70 | 41.4 gr | 82% | 29,254 psi | 53% | 2198 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 45,977 psi | 83% | 2349 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,219 psi | 73% | 2290 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 33,402 psi | 61% | 2224 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 98% | 40,625 psi | 74% | 2415 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 36,796 psi | 67% | 2247 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 31,401 psi | 57% | 2146 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,901 psi | 76% | 2349 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,247 psi | 69% | 2277 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 33,547 psi | 61% | 2215 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,447 psi | 63% | 2274 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,004 psi | 78% | 2365 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,481 psi | 75% | 2349 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,700 psi | 79% | 2274 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,230 psi | 66% | 2169 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 34,476 psi | 63% | 2182 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 40,292 psi | 73% | 2411 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 43,120 psi | 78% | 2277 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,685 psi | 77% | 2359 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 34,389 psi | 62% | 2231 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 24,860 psi | 45% | 2100 fps | 98% |
| Somchem S385 | <<locked>> | 94% | 36,187 psi | 66% | 2313 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 43,961 psi | 80% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,552 psi | 72% | 2260 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,001 psi | 73% | 2274 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,605 psi | 59% | 2172 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 28,964 psi | 53% | 2136 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 80% | 45,179 psi | 82% | 2372 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,624 psi | 70% | 2274 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 28,514 psi | 52% | 2146 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 24,105 psi | 44% | 2093 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,964 psi | 53% | 2116 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 44,425 psi | 81% | 2411 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 33,663 psi | 61% | 2274 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 24,120 psi | 44% | 2142 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,785 psi | 74% | 2356 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 99 powders for 7.5 x 55 Swiss loaded with the .308 | 208gr | Berger Long Range Hybrid Target. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,490 fps to 2,605 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 208.0 gr projectile in 0.308" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 | 208gr | Berger Long Range 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.