Load Specifications
Load data in caliber .357 SIG with .356 | 125gr | H&N RN F bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem MP200, Vihtavuori 3N37 and Alliant UNIQUE.
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 ≥ 60% and propellant combustion ≥ 80%. 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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Max Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 88% | 38,682 psi | 87% | 1302 fps | 99.9% |
| Accurate No. 5*² | <<locked>> | 72% | 36,216 psi | 82% | 1355 fps | 94.7% |
| Accurate Solo 1000 | <<locked>> | 92% | 39,653 psi | 90% | 1237 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 37,362 psi | 84% | 1273 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 25,367 psi | 57% | 1184 fps | 87% |
| ADI AP 70N | <<locked>> | 84% | 39,247 psi | 89% | 1316 fps | 100% |
| ADI APS 350 | <<locked>> | 88% | 39,392 psi | 89% | 1119 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 37,623 psi | 85% | 1138 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 37,637 psi | 85% | 1191 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 37,318 psi | 84% | 1237 fps | 100% |
| Alliant BE-86 | <<locked>> | 96% | 38,305 psi | 87% | 1276 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 36,564 psi | 83% | 1329 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 38,464 psi | 87% | 1240 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 26,208 psi | 59% | 1194 fps | 99.3% |
| Alliant POWER PISTOL*ᴾ | <<locked>> | 100% | 39,943 psi | 90% | 1447 fps | 93.5% |
| Alliant RED DOT | <<locked>> | 96% | 37,942 psi | 86% | 1217 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 38,624 psi | 87% | 1355 fps | 100% |
| Alliant UNIQUEᴾ | <<locked>> | 100% | 38,276 psi | 87% | 1362 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 37,942 psi | 86% | 1224 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 27,079 psi | 61% | 1129 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 88% | 39,015 psi | 88% | 1263 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 36,709 psi | 83% | 1280 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 38,319 psi | 87% | 1142 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 37,246 psi | 84% | 1257 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 38,072 psi | 86% | 1365 fps | 97% |
| Hodgdon Longshot² | <<locked>> | 76% | 37,217 psi | 84% | 1355 fps | 98.1% |
| Hodgdon TiteGroup² | <<locked>> | 64% | 38,972 psi | 88% | 1224 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,457 psi | 24% | 787 fps | 100% |
| Hodgdon Universal | <<locked>> | 92% | 39,247 psi | 89% | 1316 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 36,187 psi | 82% | 1355 fps | 94.7% |
| Lovex S011 | <<locked>> | 80% | 39,276 psi | 89% | 1260 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 37,652 psi | 85% | 1306 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 37,072 psi | 84% | 1266 fps | 100% |
| Maxam CSB 2ᴾ | <<locked>> | 100% | 38,014 psi | 86% | 1296 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 38,029 psi | 86% | 1257 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 38,551 psi | 87% | 1240 fps | 100% |
| Maxam CSB 5 | <<locked>> | 88% | 39,102 psi | 88% | 1194 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 37,478 psi | 85% | 1342 fps | 100% |
| Ramshot True Blue² | <<locked>> | 76% | 39,218 psi | 89% | 1371 fps | 98.5% |
| Ramshot Zip² | <<locked>> | 68% | 37,086 psi | 84% | 1263 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 88% | 39,073 psi | 88% | 1293 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,108 psi | 21% | 771 fps | 97.6% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 37,318 psi | 84% | 1348 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 37,333 psi | 84% | 1237 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 27,311 psi | 62% | 1322 fps | 93.7% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 36,187 psi | 82% | 1355 fps | 94.7% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 37,594 psi | 85% | 1299 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 37,362 psi | 84% | 1253 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 92% | 39,871 psi | 90% | 1296 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 36,245 psi | 82% | 1122 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 32,576 psi | 74% | 1276 fps | 96.2% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 37,260 psi | 84% | 1283 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 96% | 39,697 psi | 90% | 1467 fps | 95.4% |
| Somchem MP200 | <<locked>> | 92% | 39,856 psi | 90% | 1365 fps | 100% |
| Somchem MS200 | <<locked>> | 96% | 37,826 psi | 86% | 1316 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 36,883 psi | 83% | 1375 fps | 89.4% |
| Vihtavuori 3N37ᴾ | <<locked>> | 100% | 39,233 psi | 89% | 1388 fps | 98.8% |
| Vihtavuori N310² | <<locked>> | 72% | 38,566 psi | 87% | 1155 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 38,319 psi | 87% | 1243 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 20,755 psi | 47% | 978 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 36,535 psi | 83% | 1289 fps | 100% |
| Vihtavuori N340 | <<locked>> | 96% | 39,479 psi | 89% | 1335 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 33,098 psi | 75% | 1306 fps | 97.6% |
| Winchester 231² | <<locked>> | 76% | 37,086 psi | 84% | 1263 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 36,390 psi | 82% | 1243 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 36,927 psi | 83% | 1358 fps | 97.6% |
| Winchester AutoComp ᴾ | <<locked>> | 100% | 39,436 psi | 89% | 1316 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 16,027 psi | 36% | 948 fps | 91.1% |
| Accurate No. 5*² | <<locked>> | 60% | 23,830 psi | 54% | 1161 fps | 88.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 18,014 psi | 41% | 948 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 14,040 psi | 32% | 909 fps | 97.7% |
| ADI AP 100* | <<locked>> | 96% | 22,989 psi | 52% | 1142 fps | 85.1% |
| ADI AP 70N² | <<locked>> | 60% | 19,812 psi | 45% | 1050 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 21,147 psi | 48% | 909 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 19,986 psi | 45% | 919 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 17,056 psi | 39% | 915 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 18,507 psi | 42% | 978 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 14,141 psi | 32% | 919 fps | 99.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 18,768 psi | 42% | 1040 fps | 96.8% |
| Alliant Green Dot² | <<locked>> | 60% | 18,173 psi | 41% | 958 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 10,544 psi | 24% | 833 fps | 86.9% |
| Alliant POWER PISTOL* | <<locked>> | 84% | 26,484 psi | 60% | 1243 fps | 86.8% |
| Alliant RED DOT² | <<locked>> | 60% | 16,215 psi | 37% | 915 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 21,393 psi | 48% | 1093 fps | 97.6% |
| Alliant UNIQUE*² | 4.2 gr | 60% | 13,547 psi | 31% | 925 fps | 91.4% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 16,230 psi | 37% | 928 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,094 psi | 21% | 778 fps | 98% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 16,375 psi | 37% | 965 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 28,181 psi | 64% | 1175 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 16,157 psi | 37% | 853 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 28,921 psi | 65% | 1158 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 19,261 psi | 44% | 1063 fps | 86.9% |
| Hodgdon Longshot*² | <<locked>> | 60% | 21,350 psi | 48% | 1109 fps | 91.1% |
| Hodgdon TiteGroup² | <<locked>> | 60% | 34,954 psi | 79% | 1181 fps | 100% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,438 psi | 10% | 551 fps | 91.1% |
| Hodgdon Universal² | <<locked>> | 60% | 15,824 psi | 36% | 965 fps | 99.1% |
| Lovex D036*² | <<locked>> | 60% | 23,801 psi | 54% | 1158 fps | 88.1% |
| Lovex S011² | <<locked>> | 60% | 22,365 psi | 51% | 1047 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 15,577 psi | 35% | 968 fps | 96% |
| Maxam CSB 1² | <<locked>> | 60% | 12,778 psi | 29% | 873 fps | 96.7% |
| Maxam CSB 2² | <<locked>> | 60% | 12,343 psi | 28% | 902 fps | 99.6% |
| Maxam CSB 3² | <<locked>> | 60% | 15,185 psi | 34% | 922 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 16,491 psi | 37% | 935 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 19,392 psi | 44% | 951 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 19,479 psi | 44% | 1060 fps | 94.6% |
| Ramshot True Blue*² | <<locked>> | 60% | 22,655 psi | 51% | 1125 fps | 92% |
| Ramshot Zip² | <<locked>> | 60% | 27,760 psi | 63% | 1152 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 17,114 psi | 39% | 997 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 64% | 4,351 psi | 10% | 558 fps | 85.1% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 11,676 psi | 26% | 889 fps | 91.2% |
| Rottweil P 801² | <<locked>> | 60% | 20,624 psi | 47% | 1030 fps | 100% |
| Rottweil P 806* | <<locked>> | 88% | 18,362 psi | 42% | 1152 fps | 86.8% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 23,801 psi | 54% | 1158 fps | 88.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 13,039 psi | 29% | 873 fps | 90.4% |
| SNPE Vectan A1² | <<locked>> | 60% | 17,318 psi | 39% | 968 fps | 99.8% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 16,578 psi | 37% | 955 fps | 97.8% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,002 psi | 50% | 951 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 76% | 17,332 psi | 39% | 1004 fps | 86.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 15,780 psi | 36% | 951 fps | 98.5% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 21,611 psi | 49% | 1178 fps | 85.6% |
| Somchem MP200*² | 4.7 gr | 60% | 15,490 psi | 35% | 965 fps | 92.1% |
| Somchem MS200*² | <<locked>> | 60% | 14,562 psi | 33% | 928 fps | 93.8% |
| Somchem S221* | <<locked>> | 80% | 32,721 psi | 74% | 1319 fps | 87.5% |
| Vihtavuori 3N37*² | 5.7 gr | 68% | 15,098 psi | 34% | 981 fps | 85.3% |
| Vihtavuori N310² | <<locked>> | 60% | 27,035 psi | 61% | 1033 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 17,231 psi | 39% | 968 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,353 psi | 17% | 692 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 14,779 psi | 33% | 958 fps | 99.2% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,343 psi | 30% | 906 fps | 91.6% |
| Vihtavuori N350*² | <<locked>> | 72% | 15,142 psi | 34% | 978 fps | 85.8% |
| Winchester 231² | <<locked>> | 60% | 22,814 psi | 52% | 1076 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 31,517 psi | 71% | 1188 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 27,325 psi | 62% | 1220 fps | 94% |
| Winchester AutoComp ² | <<locked>> | 60% | 12,836 psi | 29% | 889 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 67 powders for .357 SIG loaded with the .356 | 125gr | H&N RN F. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,467 fps; across all powders the maximum-charge window runs from 771 fps to 1,467 fps. ADI AP 100 gives the best case fill at 100 %, and 54 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 21–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Alliant POWER PISTOL 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. Somchem MP200, Vihtavuori 3N37, Alliant UNIQUE rank at the top here: for .357 SIG with the .356 | 125gr | H&N RN F they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, ADI AP 100, Alliant POWER PISTOL burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.