Load Specifications
Load data in caliber .357 SIG with .356 | 124gr | LEE Mold 356-124-2R bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem MP200, Alliant BULLSEYE and Vihtavuori 3N37.
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% | 37,579 psi | 85% | 1286 fps | 99.7% |
| Accurate No. 5*² | <<locked>> | 72% | 34,577 psi | 78% | 1329 fps | 93.6% |
| Accurate Solo 1000 | <<locked>> | 92% | 38,421 psi | 87% | 1220 fps | 100% |
| Accurate Solo 1250ᴾ | <<locked>> | 100% | 39,059 psi | 88% | 1289 fps | 100% |
| ADI AP 70N | <<locked>> | 84% | 38,145 psi | 86% | 1302 fps | 100% |
| ADI APS 350 | <<locked>> | 88% | 39,378 psi | 89% | 1115 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 37,724 psi | 85% | 1135 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 36,201 psi | 82% | 1175 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 35,984 psi | 81% | 1220 fps | 100% |
| Alliant BE-86 | <<locked>> | 96% | 37,492 psi | 85% | 1266 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 88% | 39,436 psi | 89% | 1358 fps | 100% |
| Alliant Green Dot | <<locked>> | 96% | 39,508 psi | 89% | 1260 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 25,469 psi | 58% | 1181 fps | 99% |
| Alliant POWER PISTOL*ᴾ | <<locked>> | 100% | 39,436 psi | 89% | 1437 fps | 93% |
| Alliant RED DOT | <<locked>> | 96% | 37,956 psi | 86% | 1217 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 37,608 psi | 85% | 1339 fps | 100% |
| Alliant UNIQUEᴾ | <<locked>> | 100% | 37,333 psi | 84% | 1348 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 36,753 psi | 83% | 1211 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 26,194 psi | 59% | 1115 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 88% | 38,551 psi | 87% | 1260 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 72% | 37,811 psi | 85% | 1299 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 38,479 psi | 87% | 1142 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 36,216 psi | 82% | 1243 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 36,506 psi | 83% | 1342 fps | 96.2% |
| Hodgdon Longshot² | <<locked>> | 76% | 36,709 psi | 83% | 1345 fps | 97.7% |
| Hodgdon TiteGroup² | <<locked>> | 64% | 37,724 psi | 85% | 1207 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,153 psi | 23% | 778 fps | 100% |
| Hodgdon Universal | <<locked>> | 92% | 38,145 psi | 86% | 1302 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 34,534 psi | 78% | 1329 fps | 93.6% |
| Lovex S011 | <<locked>> | 80% | 38,043 psi | 86% | 1243 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 36,593 psi | 83% | 1293 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 36,056 psi | 82% | 1253 fps | 100% |
| Maxam CSB 2ᴾ | <<locked>> | 100% | 36,767 psi | 83% | 1283 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 38,189 psi | 86% | 1257 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 37,289 psi | 84% | 1227 fps | 100% |
| Maxam CSB 5 | <<locked>> | 88% | 39,146 psi | 88% | 1194 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 35,621 psi | 81% | 1316 fps | 99.8% |
| Ramshot True Blue² | <<locked>> | 76% | 37,550 psi | 85% | 1348 fps | 97.9% |
| Ramshot Zip² | <<locked>> | 68% | 36,027 psi | 81% | 1250 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 88% | 37,768 psi | 85% | 1280 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 8,862 psi | 20% | 761 fps | 97.1% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 36,390 psi | 82% | 1335 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 36,085 psi | 82% | 1224 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 26,121 psi | 59% | 1302 fps | 92.7% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 34,534 psi | 78% | 1329 fps | 93.6% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 36,782 psi | 83% | 1286 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 92% | 39,030 psi | 88% | 1270 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 92% | 37,768 psi | 85% | 1273 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 84% | 39,117 psi | 88% | 1152 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 31,067 psi | 70% | 1250 fps | 95.3% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 36,216 psi | 82% | 1270 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 96% | 39,160 psi | 89% | 1453 fps | 94.8% |
| Somchem MP200 | <<locked>> | 92% | 37,811 psi | 85% | 1335 fps | 100% |
| Somchem MS200 | <<locked>> | 96% | 36,912 psi | 83% | 1306 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 35,549 psi | 80% | 1352 fps | 88.2% |
| Vihtavuori 3N37ᴾ | <<locked>> | 100% | 37,405 psi | 85% | 1365 fps | 98.2% |
| Vihtavuori N310² | <<locked>> | 72% | 38,479 psi | 87% | 1152 fps | 100% |
| Vihtavuori N320 | <<locked>> | 92% | 40,001 psi | 90% | 1260 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 20,537 psi | 46% | 978 fps | 100% |
| Vihtavuori N330 | <<locked>> | 92% | 39,740 psi | 90% | 1319 fps | 100% |
| Vihtavuori N340 | <<locked>> | 96% | 37,159 psi | 84% | 1309 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 32,416 psi | 73% | 1293 fps | 97.1% |
| Winchester 231² | <<locked>> | 76% | 36,027 psi | 81% | 1250 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 35,302 psi | 80% | 1230 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 36,187 psi | 82% | 1345 fps | 97.1% |
| Winchester AutoComp ᴾ | <<locked>> | 100% | 37,463 psi | 85% | 1293 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% | 15,040 psi | 34% | 925 fps | 89.6% |
| Accurate No. 5*² | <<locked>> | 60% | 22,379 psi | 51% | 1129 fps | 86.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 17,709 psi | 40% | 942 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 13,053 psi | 30% | 883 fps | 96.6% |
| ADI AP 70N² | <<locked>> | 60% | 18,710 psi | 42% | 1027 fps | 99.8% |
| ADI APS 350² | <<locked>> | 60% | 20,711 psi | 47% | 899 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 19,653 psi | 44% | 915 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 16,650 psi | 38% | 909 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,303 psi | 39% | 955 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 13,271 psi | 30% | 896 fps | 98.7% |
| Alliant BULLSEYE² | 4.1 gr | 60% | 17,709 psi | 40% | 1014 fps | 95.8% |
| Alliant Green Dot² | <<locked>> | 60% | 16,215 psi | 37% | 935 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 10,370 psi | 23% | 827 fps | 86.1% |
| Alliant POWER PISTOL* | <<locked>> | 84% | 24,947 psi | 56% | 1211 fps | 85.2% |
| Alliant RED DOT² | <<locked>> | 60% | 15,751 psi | 36% | 906 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 20,363 psi | 46% | 1073 fps | 96.8% |
| Alliant UNIQUE*² | <<locked>> | 60% | 12,676 psi | 29% | 899 fps | 89.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 15,142 psi | 34% | 906 fps | 99.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 8,862 psi | 20% | 768 fps | 97.6% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 15,679 psi | 35% | 948 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 25,643 psi | 58% | 1148 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 15,780 psi | 36% | 846 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 27,789 psi | 63% | 1142 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 18,652 psi | 42% | 1047 fps | 85.8% |
| Hodgdon Longshot*² | <<locked>> | 60% | 20,682 psi | 47% | 1093 fps | 90.1% |
| Hodgdon TiteGroup² | <<locked>> | 60% | 33,678 psi | 76% | 1168 fps | 100% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,192 psi | 9% | 538 fps | 89.6% |
| Hodgdon Universal² | <<locked>> | 60% | 15,534 psi | 35% | 958 fps | 98.8% |
| Lovex D036*² | <<locked>> | 60% | 22,336 psi | 50% | 1129 fps | 86.5% |
| Lovex S011² | <<locked>> | 60% | 21,190 psi | 48% | 1027 fps | 100% |
| Lovex S020*² | <<locked>> | 60% | 14,620 psi | 33% | 942 fps | 94.8% |
| Maxam CSB 1² | <<locked>> | 60% | 12,502 psi | 28% | 866 fps | 96.1% |
| Maxam CSB 2² | <<locked>> | 60% | 11,995 psi | 27% | 892 fps | 99.3% |
| Maxam CSB 3² | <<locked>> | 60% | 14,881 psi | 34% | 915 fps | 99.8% |
| Maxam CSB 4² | <<locked>> | 60% | 16,128 psi | 36% | 928 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 18,985 psi | 43% | 945 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 18,681 psi | 42% | 1043 fps | 93.6% |
| Ramshot True Blue*² | <<locked>> | 60% | 21,219 psi | 48% | 1099 fps | 90.6% |
| Ramshot Zip² | <<locked>> | 60% | 27,746 psi | 63% | 1148 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 16,752 psi | 38% | 994 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 72% | 5,004 psi | 11% | 597 fps | 87.6% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 11,473 psi | 26% | 879 fps | 90.5% |
| Rottweil P 801² | <<locked>> | 60% | 20,320 psi | 46% | 1024 fps | 100% |
| Rottweil P 806* | <<locked>> | 88% | 17,318 psi | 39% | 1129 fps | 85.3% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 22,336 psi | 50% | 1129 fps | 86.5% |
| SNPE Vectan A0*² | <<locked>> | 60% | 12,850 psi | 29% | 866 fps | 89.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 16,418 psi | 37% | 945 fps | 99.5% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 15,708 psi | 36% | 935 fps | 97% |
| SNPE Vectan BA10² | <<locked>> | 60% | 21,683 psi | 49% | 945 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 76% | 16,694 psi | 38% | 988 fps | 85.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 14,794 psi | 33% | 928 fps | 97.7% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 23,322 psi | 53% | 1211 fps | 86.5% |
| Somchem MP200*² | 4.6 gr | 60% | 15,331 psi | 35% | 958 fps | 91.5% |
| Somchem MS200*² | <<locked>> | 60% | 14,344 psi | 32% | 922 fps | 93.2% |
| Somchem S221* | <<locked>> | 80% | 31,444 psi | 71% | 1293 fps | 86.2% |
| Vihtavuori 3N37*² | 5.9 gr | 72% | 16,911 psi | 38% | 1024 fps | 87% |
| Vihtavuori N310² | <<locked>> | 60% | 26,643 psi | 60% | 1027 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 15,983 psi | 36% | 945 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,513 psi | 17% | 699 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 14,475 psi | 33% | 951 fps | 98.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,126 psi | 30% | 899 fps | 90.9% |
| Vihtavuori N350*² | <<locked>> | 76% | 16,360 psi | 37% | 1007 fps | 86.8% |
| Winchester 231² | <<locked>> | 60% | 21,741 psi | 49% | 1056 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 30,371 psi | 69% | 1175 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 26,469 psi | 60% | 1204 fps | 93.2% |
| Winchester AutoComp ² | <<locked>> | 60% | 12,647 psi | 29% | 883 fps | 95% |
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 66 powders for .357 SIG loaded with the .356 | 124gr | LEE Mold 356-124-2R. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,453 fps; across all powders the maximum-charge window runs from 761 fps to 1,453 fps. Accurate Solo 1250 gives the best case fill at 100 %, and 53 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 20–90 %, leaving at least 10 % headroom. Accurate Solo 1250, 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, Alliant BULLSEYE, Vihtavuori 3N37 rank at the top here: for .357 SIG with the .356 | 124gr | LEE Mold 356-124-2R they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, Alliant POWER PISTOL, Lovex D036 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.