Load Specifications
Load data in caliber .357 SIG with .356 | 115gr | Berry's Round Nose bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori 3N37, Alliant UNIQUE and Somchem MP200.
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>> | 84% | 36,085 psi | 82% | 1332 fps | 99.4% |
| Accurate No. 5*² | <<locked>> | 72% | 38,334 psi | 87% | 1444 fps | 94.5% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,753 psi | 85% | 1276 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,450 psi | 89% | 1355 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,949 psi | 63% | 1276 fps | 87.4% |
| ADI AP 70N² | <<locked>> | 76% | 35,476 psi | 80% | 1325 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,972 psi | 88% | 1171 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,566 psi | 89% | 1214 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,086 psi | 84% | 1234 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 36,854 psi | 83% | 1283 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 37,811 psi | 85% | 1329 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,377 psi | 87% | 1411 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,885 psi | 90% | 1322 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 30,110 psi | 68% | 1296 fps | 99.6% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 38,682 psi | 87% | 1493 fps | 92% |
| Alliant RED DOT | <<locked>> | 92% | 38,798 psi | 88% | 1276 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,680 psi | 83% | 1391 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 38,580 psi | 87% | 1424 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,695 psi | 85% | 1280 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,704 psi | 67% | 1207 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,319 psi | 87% | 1316 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 37,391 psi | 85% | 1352 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 37,768 psi | 85% | 1194 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,407 psi | 89% | 1335 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,056 psi | 82% | 1394 fps | 95.6% |
| Hodgdon Longshot² | <<locked>> | 72% | 35,476 psi | 80% | 1388 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,764 psi | 31% | 873 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 38,943 psi | 88% | 1365 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 38,261 psi | 86% | 1440 fps | 94.4% |
| Lovex S011² | <<locked>> | 76% | 37,057 psi | 84% | 1296 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 40,016 psi | 90% | 1391 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,102 psi | 88% | 1348 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 38,696 psi | 87% | 1358 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,739 psi | 85% | 1312 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,043 psi | 84% | 1280 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,986 psi | 88% | 1250 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 39,972 psi | 90% | 1434 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 37,014 psi | 84% | 1404 fps | 97.4% |
| Ramshot Zip² | <<locked>> | 68% | 39,218 psi | 89% | 1342 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,666 psi | 83% | 1316 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,981 psi | 29% | 876 fps | 99.7% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,477 psi | 82% | 1401 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 37,550 psi | 85% | 1289 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 32,111 psi | 73% | 1447 fps | 94.8% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 38,261 psi | 86% | 1440 fps | 94.4% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 40,030 psi | 90% | 1388 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 38,812 psi | 88% | 1329 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,550 psi | 85% | 1332 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,247 psi | 86% | 1201 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,027 psi | 79% | 1362 fps | 96.2% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,465 psi | 89% | 1365 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 38,986 psi | 88% | 1512 fps | 94.1% |
| Somchem MP200 | <<locked>> | 88% | 38,290 psi | 87% | 1404 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,681 psi | 85% | 1371 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 36,782 psi | 83% | 1424 fps | 88% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,029 psi | 86% | 1434 fps | 97.9% |
| Vihtavuori N310² | <<locked>> | 68% | 37,478 psi | 85% | 1198 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 37,072 psi | 84% | 1289 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,685 psi | 56% | 1066 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 38,885 psi | 88% | 1371 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 37,594 psi | 85% | 1375 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 35,708 psi | 81% | 1398 fps | 97.6% |
| Winchester 231² | <<locked>> | 76% | 39,218 psi | 89% | 1342 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,609 psi | 87% | 1325 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 39,537 psi | 89% | 1453 fps | 97.5% |
| Winchester AutoComp | <<locked>> | 96% | 39,030 psi | 88% | 1371 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% | 18,144 psi | 41% | 1027 fps | 92% |
| Accurate No. 5*² | <<locked>> | 60% | 25,933 psi | 59% | 1240 fps | 88.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 20,247 psi | 46% | 1024 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,636 psi | 38% | 994 fps | 98.6% |
| ADI AP 100* | <<locked>> | 96% | 25,686 psi | 58% | 1234 fps | 85.8% |
| ADI AP 70N² | <<locked>> | 60% | 23,177 psi | 52% | 1138 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,279 psi | 53% | 974 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,958 psi | 47% | 971 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,233 psi | 46% | 997 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,596 psi | 49% | 1060 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,868 psi | 38% | 1001 fps | 99.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,827 psi | 47% | 1115 fps | 97.2% |
| Alliant Green Dot² | <<locked>> | 60% | 19,711 psi | 45% | 1027 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,850 psi | 29% | 909 fps | 89.4% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 26,194 psi | 59% | 1280 fps | 85.2% |
| Alliant RED DOT² | <<locked>> | 60% | 19,551 psi | 44% | 1001 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,192 psi | 52% | 1168 fps | 97.7% |
| Alliant UNIQUE*² | 4.4 gr | 60% | 16,752 psi | 38% | 1024 fps | 93.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 18,913 psi | 43% | 1007 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,125 psi | 27% | 873 fps | 99.6% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,392 psi | 44% | 1050 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 29,515 psi | 67% | 1250 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 18,376 psi | 42% | 925 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,560 psi | 71% | 1243 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,785 psi | 49% | 1148 fps | 87.8% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,801 psi | 54% | 1191 fps | 91.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,455 psi | 17% | 656 fps | 98.1% |
| Hodgdon Universal² | <<locked>> | 60% | 20,073 psi | 45% | 1076 fps | 99.9% |
| Lovex D036*² | <<locked>> | 60% | 25,875 psi | 58% | 1240 fps | 88.3% |
| Lovex S011² | <<locked>> | 60% | 24,091 psi | 54% | 1119 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 18,463 psi | 42% | 1053 fps | 97.1% |
| Maxam CSB 1² | <<locked>> | 60% | 15,490 psi | 35% | 958 fps | 98% |
| Maxam CSB 2² | <<locked>> | 60% | 15,998 psi | 36% | 1001 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,854 psi | 40% | 1004 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,072 psi | 43% | 1014 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,988 psi | 50% | 1027 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,133 psi | 50% | 1152 fps | 95.4% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,990 psi | 56% | 1211 fps | 92.4% |
| Ramshot Zip² | <<locked>> | 60% | 30,443 psi | 69% | 1234 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,857 psi | 49% | 1109 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 7,107 psi | 16% | 643 fps | 93.9% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 14,721 psi | 33% | 994 fps | 94.1% |
| Rottweil P 801² | <<locked>> | 60% | 25,193 psi | 57% | 1129 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 19,943 psi | 45% | 1217 fps | 86.9% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,875 psi | 58% | 1240 fps | 88.3% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,853 psi | 36% | 971 fps | 92.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,319 psi | 44% | 1040 fps | 99.9% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,565 psi | 42% | 1030 fps | 98.2% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,786 psi | 54% | 1017 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 18,231 psi | 41% | 1053 fps | 86% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,405 psi | 42% | 1033 fps | 99.1% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 24,671 psi | 56% | 1276 fps | 86.6% |
| Somchem MP200*² | 5 gr | 60% | 18,797 psi | 42% | 1066 fps | 94% |
| Somchem MS200² | <<locked>> | 60% | 17,187 psi | 39% | 1014 fps | 95.1% |
| Somchem S221*² | <<locked>> | 76% | 32,343 psi | 73% | 1355 fps | 85.8% |
| Vihtavuori 3N37*² | 5.7 gr | 64% | 16,346 psi | 37% | 1033 fps | 85.4% |
| Vihtavuori N310² | <<locked>> | 60% | 29,631 psi | 67% | 1106 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 20,218 psi | 46% | 1050 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,037 psi | 25% | 791 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 18,289 psi | 41% | 1063 fps | 99.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 16,650 psi | 38% | 1007 fps | 94% |
| Vihtavuori N350*² | <<locked>> | 68% | 15,708 psi | 36% | 1014 fps | 85.1% |
| Winchester 231² | <<locked>> | 60% | 24,860 psi | 56% | 1148 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,113 psi | 77% | 1273 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 30,414 psi | 69% | 1319 fps | 94.5% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,317 psi | 37% | 994 fps | 97.6% |
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 66 powders for .357 SIG loaded with the .356 | 115gr | Berry's Round Nose. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,512 fps; across all powders the maximum-charge window runs from 873 fps to 1,512 fps. ADI AP 100 gives the best case fill at 100 %, and 49 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 29–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 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. Vihtavuori 3N37, Alliant UNIQUE, Somchem MP200 rank at the top here: for .357 SIG with the .356 | 115gr | Berry's Round Nose 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.