Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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 ReloadSwiss RS 60.
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% | 48,921 psi | 89% | 2428 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 46,731 psi | 85% | 2454 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 46,891 psi | 85% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 46,891 psi | 85% | 2503 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 47,877 psi | 87% | 2470 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,173 psi | 67% | 2421 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 47,007 psi | 85% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 49,342 psi | 90% | 2628 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 48,124 psi | 87% | 2533 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 49,313 psi | 89% | 2536 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 45,701 psi | 83% | 2562 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 47,398 psi | 86% | 2487 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 47,674 psi | 87% | 2457 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,181 psi | 86% | 2641 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 48,892 psi | 89% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 49,356 psi | 90% | 2575 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,254 psi | 88% | 2638 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 48,950 psi | 89% | 2667 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 44,701 psi | 81% | 2556 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,230 psi | 66% | 2457 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,059 psi | 73% | 2602 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 47,543 psi | 86% | 2549 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 48,820 psi | 89% | 2566 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 49,458 psi | 90% | 2543 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 49,342 psi | 90% | 2470 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 49,182 psi | 89% | 2559 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 46,905 psi | 85% | 2536 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 96% | 49,124 psi | 89% | 2631 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 92% | 47,326 psi | 86% | 2549 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 48,602 psi | 88% | 2543 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,630 psi | 86% | 2566 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 47,427 psi | 86% | 2572 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 49,748 psi | 90% | 2667 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 64% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 46,891 psi | 85% | 2500 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 48,312 psi | 88% | 2520 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 48,689 psi | 88% | 2516 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,791 psi | 89% | 2500 fps | 98.4% |
| IMR 4350 | <<locked>> | 98% | 49,530 psi | 90% | 2569 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,646 psi | 88% | 2533 fps | 98.4% |
| IMR 4831 | <<locked>> | 98% | 47,050 psi | 85% | 2579 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 47,442 psi | 86% | 2556 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 47,398 psi | 86% | 2487 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 47,210 psi | 86% | 2507 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,370 psi | 88% | 2467 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 48,298 psi | 88% | 2513 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 47,601 psi | 86% | 2523 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 48,138 psi | 87% | 2556 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 46,963 psi | 85% | 2480 fps | 100% |
| Norma 202 | <<locked>> | 84% | 47,369 psi | 86% | 2484 fps | 100% |
| Norma 203B | <<locked>> | 88% | 48,559 psi | 88% | 2562 fps | 100% |
| Norma 204 | <<locked>> | 96% | 46,746 psi | 85% | 2566 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 40,306 psi | 73% | 2562 fps | 97% |
| Norma URP | <<locked>> | 98% | 49,095 psi | 89% | 2625 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 48,791 psi | 89% | 2589 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 47,993 psi | 87% | 2621 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 47,355 psi | 86% | 2507 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 46,760 psi | 85% | 2523 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 65% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,398 psi | 86% | 2520 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 49,284 psi | 89% | 2631 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 48,660 psi | 88% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 48,907 psi | 89% | 2651 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 49,356 psi | 90% | 2680 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 48,109 psi | 87% | 2461 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 47,558 psi | 86% | 2484 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 48,660 psi | 88% | 2559 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 42,989 psi | 78% | 2533 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 49,458 psi | 90% | 2543 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,601 psi | 86% | 2523 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 47,210 psi | 86% | 2507 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,298 psi | 88% | 2513 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 48,138 psi | 87% | 2556 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 47,340 psi | 86% | 2575 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 48,849 psi | 89% | 2533 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 49,705 psi | 90% | 2556 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 48,660 psi | 88% | 2421 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 48,863 psi | 89% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,514 psi | 86% | 2477 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 42,627 psi | 77% | 2530 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 48,080 psi | 87% | 2425 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 48,486 psi | 88% | 2523 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 49,356 psi | 90% | 2559 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,572 psi | 85% | 2618 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 43,337 psi | 79% | 2516 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 48,965 psi | 89% | 2408 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 47,108 psi | 85% | 2448 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 47,805 psi | 87% | 2461 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 47,456 psi | 86% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 48,225 psi | 88% | 2569 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 47,703 psi | 87% | 2487 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 49,342 psi | 90% | 2510 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 47,123 psi | 86% | 2575 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,117 psi | 71% | 2520 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 48,428 psi | 88% | 2549 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,036 psi | 85% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 49,414 psi | 90% | 2635 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,169 psi | 58% | 2470 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 49,226 psi | 89% | 2559 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% | 46,064 psi | 84% | 2392 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,334 psi | 70% | 2333 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,888 psi | 80% | 2461 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,888 psi | 80% | 2461 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 39,102 psi | 71% | 2323 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 30,081 psi | 55% | 2274 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 36,274 psi | 66% | 2336 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 26,049 psi | 47% | 2182 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 42,337 psi | 77% | 2441 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,201 psi | 66% | 2316 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 98% | 42,830 psi | 78% | 2510 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,483 psi | 81% | 2441 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 44,454 psi | 81% | 2415 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,319 psi | 70% | 2480 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,491 psi | 64% | 2333 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,072 psi | 69% | 2388 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 27,615 psi | 50% | 2205 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,501 psi | 55% | 2316 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 41,959 psi | 76% | 2507 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 23,598 psi | 43% | 2123 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 28,384 psi | 52% | 2323 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,655 psi | 76% | 2454 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 34,867 psi | 63% | 2336 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 36,071 psi | 65% | 2310 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,354 psi | 84% | 2428 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,902 psi | 78% | 2467 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,795 psi | 65% | 2339 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 35,244 psi | 64% | 2382 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 39,073 psi | 71% | 2405 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,743 psi | 78% | 2451 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 24,976 psi | 45% | 2110 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,682 psi | 70% | 2431 fps | 99.9% |
| Hodgdon Superformance | 48.6 gr | 88% | 37,478 psi | 68% | 2448 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 47% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,176 psi | 75% | 2411 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 42,366 psi | 77% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,956 psi | 69% | 2339 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,364 psi | 73% | 2359 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 36,289 psi | 66% | 2339 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 35,505 psi | 64% | 2293 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 25,875 psi | 47% | 2156 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,030 psi | 71% | 2415 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 44,483 psi | 81% | 2441 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,031 psi | 74% | 2415 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,641 psi | 77% | 2379 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 37,478 psi | 68% | 2339 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 30,792 psi | 56% | 2205 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 34,940 psi | 63% | 2320 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 41,524 psi | 75% | 2395 fps | 100% |
| Norma 202 | <<locked>> | 80% | 41,858 psi | 76% | 2402 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,449 psi | 68% | 2379 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 40,770 psi | 74% | 2461 fps | 95% |
| Norma MRP | <<locked>> | 96% | 35,447 psi | 64% | 2461 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 27,209 psi | 49% | 2195 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 36,927 psi | 67% | 2392 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 32,416 psi | 59% | 2326 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 44,251 psi | 80% | 2457 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,903 psi | 80% | 2477 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,469 psi | 48% | 1411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 36,289 psi | 66% | 2323 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,842 psi | 72% | 2480 fps | 99.5% |
| ReloadSwiss RS 60 | 41.8 gr | 80% | 32,518 psi | 59% | 2372 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 28,224 psi | 51% | 2251 fps | 95.7% |
| ReloadSwiss RS 70 | 44.5 gr | 84% | 30,618 psi | 56% | 2306 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 45,121 psi | 82% | 2418 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,392 psi | 71% | 2352 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 32,706 psi | 59% | 2287 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 98% | 40,205 psi | 73% | 2484 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 36,071 psi | 65% | 2310 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 30,792 psi | 56% | 2205 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,031 psi | 74% | 2415 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,478 psi | 68% | 2339 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 34,940 psi | 63% | 2320 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,779 psi | 61% | 2336 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,337 psi | 77% | 2431 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,857 psi | 74% | 2415 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,149 psi | 78% | 2343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,708 psi | 65% | 2231 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 33,881 psi | 61% | 2241 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 39,871 psi | 72% | 2477 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 42,641 psi | 77% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,395 psi | 77% | 2431 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 33,794 psi | 61% | 2293 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 24,192 psi | 44% | 2149 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 35,520 psi | 64% | 2372 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 43,540 psi | 79% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,914 psi | 71% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,566 psi | 72% | 2339 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,053 psi | 58% | 2234 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 28,384 psi | 52% | 2192 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 44,657 psi | 81% | 2441 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 37,956 psi | 69% | 2339 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 27,804 psi | 50% | 2198 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 24,831 psi | 45% | 2188 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,529 psi | 52% | 2175 fps | 98% |
| Winchester 748 | <<locked>> | 80% | 44,048 psi | 80% | 2484 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 35,462 psi | 64% | 2385 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 23,438 psi | 43% | 2185 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,277 psi | 73% | 2421 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 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,680 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,680 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 58–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:12.0 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, ReloadSwiss RS 60 rank at the top here: for 7.5 x 55 Swiss with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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.