Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 220gr | Woodleigh RN SN bullet and 89 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-26 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.
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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>> | 82% | 48,733 psi | 88% | 2359 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,239 psi | 86% | 2375 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,571 psi | 83% | 2457 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 48,950 psi | 89% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 48,501 psi | 88% | 2503 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 47,239 psi | 86% | 2582 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 86% | 49,821 psi | 90% | 2441 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 46,920 psi | 85% | 2497 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 47,601 psi | 86% | 2536 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 47,892 psi | 87% | 2543 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 49,705 psi | 90% | 2543 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,137 psi | 86% | 2418 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,195 psi | 86% | 2434 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 49,661 psi | 90% | 2552 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 47,021 psi | 85% | 2530 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,994 psi | 89% | 2536 fps | 98.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,803 psi | 83% | 2536 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,192 psi | 78% | 2480 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,898 psi | 69% | 2418 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,414 psi | 88% | 2644 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 42,206 psi | 77% | 2474 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 47,326 psi | 86% | 2431 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,803 psi | 83% | 2536 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 47,355 psi | 86% | 2418 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 47,747 psi | 87% | 2444 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 47,558 psi | 86% | 2503 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 48,399 psi | 88% | 2470 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 98% | 47,819 psi | 87% | 2487 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 46,659 psi | 85% | 2467 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 49,487 psi | 90% | 2480 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 48,530 psi | 88% | 2470 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 37,159 psi | 67% | 2441 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 90% | 47,152 psi | 86% | 2536 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 66% | 1499 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,371 psi | 90% | 2421 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,052 psi | 89% | 2411 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 47,747 psi | 87% | 2448 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 48,994 psi | 89% | 2441 fps | 99.4% |
| IMR 4831 | <<locked>> | 94% | 49,153 psi | 89% | 2497 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 48,399 psi | 88% | 2457 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 49,806 psi | 90% | 2480 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 44,991 psi | 82% | 2503 fps | 96.7% |
| Lovex S062 | <<locked>> | 84% | 49,429 psi | 90% | 2418 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 48,747 psi | 88% | 2438 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 49,443 psi | 90% | 2474 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,029 psi | 69% | 2336 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 49,748 psi | 90% | 2467 fps | 100% |
| Norma 204 | <<locked>> | 92% | 47,587 psi | 86% | 2487 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 48,254 psi | 88% | 2608 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 47,630 psi | 86% | 2493 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 49,690 psi | 90% | 2487 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 44,759 psi | 81% | 2510 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 49,559 psi | 90% | 2543 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 39,726 psi | 72% | 2408 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 66% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 47,877 psi | 87% | 2428 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 46,760 psi | 85% | 2523 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 47,805 psi | 87% | 2523 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 47,166 psi | 86% | 2552 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 36,666 psi | 67% | 2431 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 82% | 48,399 psi | 88% | 2382 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 47,181 psi | 86% | 2425 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 48,399 psi | 88% | 2467 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 98% | 47,848 psi | 87% | 2520 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 47,355 psi | 86% | 2418 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 48,747 psi | 88% | 2438 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 49,429 psi | 90% | 2418 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 49,443 psi | 90% | 2474 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 48,602 psi | 88% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,342 psi | 90% | 2326 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,356 psi | 88% | 2395 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,384 psi | 86% | 2513 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 47,877 psi | 87% | 2425 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 49,792 psi | 90% | 2461 fps | 96.9% |
| Somchem S365 | <<locked>> | 96% | 49,284 psi | 89% | 2536 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 48,428 psi | 88% | 2497 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 48,298 psi | 88% | 2343 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 48,791 psi | 89% | 2362 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 48,776 psi | 89% | 2402 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 46,688 psi | 85% | 2441 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,570 psi | 81% | 2425 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 46,992 psi | 85% | 2365 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 48,936 psi | 89% | 2497 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,993 psi | 87% | 2543 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 49,052 psi | 89% | 2598 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 49,356 psi | 90% | 2457 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 47,863 psi | 87% | 2507 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,638 psi | 70% | 2530 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,428 psi | 88% | 2487 fps | 98.4% |
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% | 45,745 psi | 83% | 2320 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,266 psi | 80% | 2329 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 26,731 psi | 49% | 2096 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,294 psi | 79% | 2329 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,169 psi | 58% | 2228 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 98% | 44,193 psi | 80% | 2530 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,582 psi | 75% | 2316 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 36,361 psi | 66% | 2303 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 41,843 psi | 76% | 2434 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,701 psi | 81% | 2497 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 36,390 psi | 66% | 2310 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,481 psi | 75% | 2333 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,440 psi | 81% | 2392 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,242 psi | 59% | 2238 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,839 psi | 65% | 2343 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 35,984 psi | 65% | 2303 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 35,534 psi | 64% | 2346 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 23,482 psi | 43% | 2041 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 26,426 psi | 48% | 2133 fps | 95% |
| Alliant Reloder-26 | 44.8 gr | 80% | 24,468 psi | 44% | 2123 fps | 95.2% |
| Bofors RP15 | <<locked>> | 94% | 35,070 psi | 64% | 2333 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 41,510 psi | 75% | 2346 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 35,534 psi | 64% | 2346 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 36,999 psi | 67% | 2238 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 80% | 42,003 psi | 76% | 2352 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 34,345 psi | 62% | 2267 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 37,579 psi | 68% | 2283 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 41,785 psi | 76% | 2388 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 43,874 psi | 80% | 2425 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,646 psi | 54% | 2142 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,658 psi | 83% | 2431 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 35,041 psi | 64% | 2388 fps | 95.7% |
| Hodgdon Superformance | 46.2 gr | 80% | 33,286 psi | 60% | 2270 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,006 psi | 49% | 1339 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,714 psi | 79% | 2339 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,934 psi | 83% | 2362 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 32,924 psi | 60% | 2178 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,464 psi | 70% | 2264 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 31,183 psi | 57% | 2188 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 45,542 psi | 83% | 2415 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 41,423 psi | 75% | 2346 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 39,813 psi | 72% | 2408 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 43,801 psi | 79% | 2336 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,984 psi | 65% | 2224 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 34,098 psi | 62% | 2205 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 26,063 psi | 47% | 2077 fps | 95% |
| Norma 203B | <<locked>> | 80% | 43,801 psi | 79% | 2382 fps | 100% |
| Norma 204 | <<locked>> | 84% | 36,593 psi | 66% | 2293 fps | 95.6% |
| Norma MRP | <<locked>> | 86% | 30,472 psi | 55% | 2257 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 32,329 psi | 59% | 2224 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,482 psi | 79% | 2398 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 39,204 psi | 71% | 2408 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 31,604 psi | 57% | 2218 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 96% | 34,592 psi | 63% | 2306 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 49% | 1368 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,279 psi | 77% | 2339 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,130 psi | 69% | 2385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,807 psi | 58% | 2244 fps | 98.5% |
| ReloadSwiss RS 70 | 44.4 gr | 80% | 31,575 psi | 57% | 2251 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 31,981 psi | 58% | 2316 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 45,556 psi | 83% | 2343 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,899 psi | 71% | 2297 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 40,074 psi | 73% | 2329 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 34,592 psi | 63% | 2283 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 36,999 psi | 67% | 2238 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,984 psi | 65% | 2224 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 43,801 psi | 79% | 2336 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 34,098 psi | 62% | 2205 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,987 psi | 73% | 2349 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,944 psi | 74% | 2211 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,157 psi | 64% | 2175 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 34,301 psi | 62% | 2277 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 39,668 psi | 72% | 2300 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 43,758 psi | 79% | 2369 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 29,138 psi | 53% | 2192 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 30,951 psi | 56% | 2178 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 45,353 psi | 82% | 2306 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,629 psi | 83% | 2323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,608 psi | 68% | 2234 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 33,750 psi | 61% | 2221 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 32,474 psi | 59% | 2201 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 44,034 psi | 80% | 2326 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,228 psi | 60% | 2228 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 25,150 psi | 46% | 2103 fps | 97.2% |
| Vihtavuori N560 | <<locked>> | 94% | 40,234 psi | 73% | 2444 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,272 psi | 60% | 2198 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 34,345 psi | 62% | 2267 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 20,697 psi | 38% | 2014 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 34,766 psi | 63% | 2251 fps | 95.1% |
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 89 powders for 7.5 x 55 Swiss loaded with the .308 | 220gr | Woodleigh RN SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,644 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,644 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-26, Hodgdon Superformance rank at the top here: for 7.5 x 55 Swiss with the .308 | 220gr | Woodleigh RN SN 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.