Load Specifications
Load data in caliber .357 SIG with .356 | 100gr | Rim Rock FP Top Shelf 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 N340, Alliant UNIQUE and Somchem MS200.
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% | 38,696 psi | 87% | 1522 fps | 99.3% |
| Accurate No. 5*² | <<locked>> | 72% | 36,970 psi | 84% | 1585 fps | 92.9% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,130 psi | 84% | 1424 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 37,898 psi | 86% | 1499 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 36,898 psi | 83% | 1509 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 36,709 psi | 83% | 1289 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 38,667 psi | 87% | 1352 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 38,914 psi | 88% | 1414 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 38,827 psi | 88% | 1467 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 36,056 psi | 82% | 1467 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 37,420 psi | 85% | 1562 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 38,174 psi | 86% | 1463 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 28,123 psi | 64% | 1414 fps | 98.8% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 37,782 psi | 85% | 1640 fps | 90.3% |
| Alliant RED DOT | <<locked>> | 96% | 39,233 psi | 89% | 1444 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 38,580 psi | 87% | 1581 fps | 100% |
| Alliant UNIQUEᴾ | <<locked>> | 100% | 39,871 psi | 90% | 1608 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 39,291 psi | 89% | 1453 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 28,645 psi | 65% | 1339 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 35,984 psi | 81% | 1444 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 35,665 psi | 81% | 1490 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 38,972 psi | 88% | 1355 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 38,058 psi | 86% | 1483 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 38,856 psi | 88% | 1594 fps | 95.6% |
| Hodgdon Longshot² | <<locked>> | 76% | 38,682 psi | 87% | 1591 fps | 97.1% |
| Hodgdon TiteGroup² | <<locked>> | 64% | 39,856 psi | 90% | 1447 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 11,922 psi | 27% | 948 fps | 100% |
| Hodgdon Universal | <<locked>> | 92% | 40,001 psi | 90% | 1549 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 36,970 psi | 84% | 1581 fps | 92.9% |
| Lovex S011² | <<locked>> | 76% | 35,955 psi | 81% | 1440 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 38,609 psi | 87% | 1542 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 37,246 psi | 84% | 1490 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 36,230 psi | 82% | 1493 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 39,233 psi | 89% | 1490 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 39,291 psi | 89% | 1467 fps | 100% |
| Maxam CSB 5 | <<locked>> | 88% | 40,001 psi | 90% | 1417 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 38,406 psi | 87% | 1575 fps | 99.6% |
| Ramshot True Blue² | <<locked>> | 72% | 35,708 psi | 81% | 1542 fps | 96.2% |
| Ramshot Zip² | <<locked>> | 68% | 37,681 psi | 85% | 1486 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 36,869 psi | 83% | 1486 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,776 psi | 24% | 932 fps | 97.7% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 38,827 psi | 88% | 1594 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 39,146 psi | 88% | 1470 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 30,110 psi | 68% | 1562 fps | 92.4% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 36,970 psi | 84% | 1581 fps | 92.9% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 38,537 psi | 87% | 1532 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 37,971 psi | 86% | 1476 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 92% | 39,769 psi | 90% | 1519 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 84% | 39,798 psi | 90% | 1365 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 33,678 psi | 76% | 1496 fps | 94.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 38,508 psi | 87% | 1519 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 36,912 psi | 83% | 1650 fps | 92.2% |
| Somchem MP200 | <<locked>> | 88% | 37,304 psi | 84% | 1552 fps | 99.7% |
| Somchem MS200 | <<locked>> | 96% | 39,610 psi | 90% | 1562 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 39,262 psi | 89% | 1621 fps | 87.9% |
| Vihtavuori 3N37 | <<locked>> | 96% | 36,274 psi | 82% | 1568 fps | 96.7% |
| Vihtavuori N310² | <<locked>> | 72% | 39,349 psi | 89% | 1368 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,102 psi | 88% | 1470 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,510 psi | 51% | 1171 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 36,825 psi | 83% | 1512 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 36,071 psi | 82% | 1516 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 34,534 psi | 78% | 1539 fps | 96.5% |
| Winchester 231² | <<locked>> | 76% | 37,681 psi | 85% | 1486 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 37,478 psi | 85% | 1473 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 38,856 psi | 88% | 1608 fps | 96.6% |
| Winchester AutoComp | <<locked>> | 96% | 36,448 psi | 82% | 1499 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% | 16,752 psi | 38% | 1115 fps | 89.3% |
| Accurate No. 5*² | <<locked>> | 60% | 24,569 psi | 56% | 1352 fps | 85.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 18,318 psi | 41% | 1112 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 14,866 psi | 34% | 1070 fps | 96.5% |
| ADI AP 70N² | <<locked>> | 60% | 21,466 psi | 49% | 1247 fps | 99.8% |
| ADI APS 350² | <<locked>> | 60% | 21,205 psi | 48% | 1066 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,392 psi | 46% | 1086 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,246 psi | 41% | 1089 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,725 psi | 45% | 1158 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,011 psi | 34% | 1076 fps | 98.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 19,450 psi | 44% | 1217 fps | 95.3% |
| Alliant Green Dot² | <<locked>> | 60% | 18,101 psi | 41% | 1125 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 11,864 psi | 27% | 994 fps | 86.1% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 30,211 psi | 68% | 1506 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 17,608 psi | 40% | 1093 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,031 psi | 50% | 1280 fps | 96.2% |
| Alliant UNIQUE*² | 5.1 gr | 60% | 14,939 psi | 34% | 1099 fps | 90.3% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,100 psi | 39% | 1096 fps | 99.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,269 psi | 23% | 925 fps | 97.6% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 17,593 psi | 40% | 1138 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 27,122 psi | 61% | 1362 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 16,476 psi | 37% | 1004 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 30,240 psi | 68% | 1375 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 20,508 psi | 46% | 1250 fps | 85.2% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,466 psi | 51% | 1299 fps | 89.2% |
| Hodgdon TiteGroup² | <<locked>> | 60% | 35,505 psi | 80% | 1394 fps | 100% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,569 psi | 13% | 673 fps | 92.6% |
| Hodgdon Universal² | <<locked>> | 60% | 17,521 psi | 40% | 1152 fps | 98.7% |
| Lovex D036*² | <<locked>> | 60% | 24,526 psi | 55% | 1348 fps | 85.8% |
| Lovex S011² | <<locked>> | 60% | 22,785 psi | 52% | 1230 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,071 psi | 39% | 1152 fps | 95.1% |
| Maxam CSB 1² | <<locked>> | 60% | 13,779 psi | 31% | 1033 fps | 95.7% |
| Maxam CSB 2² | <<locked>> | 60% | 14,228 psi | 32% | 1086 fps | 99.5% |
| Maxam CSB 3² | <<locked>> | 60% | 16,259 psi | 37% | 1093 fps | 99.7% |
| Maxam CSB 4² | <<locked>> | 60% | 17,637 psi | 40% | 1112 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,740 psi | 47% | 1138 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 20,479 psi | 46% | 1247 fps | 93% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,641 psi | 53% | 1322 fps | 90.2% |
| Ramshot Zip² | <<locked>> | 60% | 29,066 psi | 66% | 1365 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 18,681 psi | 42% | 1188 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,352 psi | 12% | 666 fps | 86.6% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,097 psi | 30% | 1063 fps | 90.3% |
| Rottweil P 801² | <<locked>> | 60% | 22,582 psi | 51% | 1227 fps | 100% |
| Rottweil P 806* | <<locked>> | 92% | 22,742 psi | 51% | 1417 fps | 87.5% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 24,526 psi | 55% | 1348 fps | 85.8% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,098 psi | 32% | 1037 fps | 89.1% |
| SNPE Vectan A1² | <<locked>> | 60% | 17,869 psi | 40% | 1132 fps | 99.3% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,071 psi | 39% | 1115 fps | 96.5% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,858 psi | 52% | 1132 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 20,595 psi | 47% | 1240 fps | 86.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 16,897 psi | 38% | 1125 fps | 97.7% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 26,150 psi | 59% | 1453 fps | 86.1% |
| Somchem MP200*² | <<locked>> | 60% | 17,231 psi | 39% | 1155 fps | 91.2% |
| Somchem MS200*² | 5.1 gr | 60% | 15,722 psi | 36% | 1099 fps | 92.5% |
| Somchem S221* | <<locked>> | 80% | 34,171 psi | 77% | 1542 fps | 85.4% |
| Vihtavuori 3N37*² | <<locked>> | 72% | 18,739 psi | 42% | 1224 fps | 86.4% |
| Vihtavuori N310² | <<locked>> | 60% | 28,732 psi | 65% | 1237 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,130 psi | 41% | 1145 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,108 psi | 21% | 850 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,404 psi | 37% | 1148 fps | 98.8% |
| Vihtavuori N340*² | 5.3 gr | 60% | 14,881 psi | 34% | 1083 fps | 90.8% |
| Vihtavuori N350*² | <<locked>> | 76% | 17,767 psi | 40% | 1198 fps | 85.8% |
| Winchester 231² | <<locked>> | 60% | 23,395 psi | 53% | 1263 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 32,460 psi | 73% | 1404 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 29,022 psi | 66% | 1444 fps | 92.6% |
| Winchester AutoComp *² | <<locked>> | 60% | 14,286 psi | 32% | 1060 fps | 94.8% |
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 | 100gr | Rim Rock FP Top Shelf. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,650 fps; across all powders the maximum-charge window runs from 932 fps to 1,650 fps. Alliant Herco gives the best case fill at 100 %, and 52 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 24–90 %, leaving at least 10 % headroom. Alliant Herco, Alliant UNIQUE, 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 N340, Alliant UNIQUE, Somchem MS200 rank at the top here: for .357 SIG with the .356 | 100gr | Rim Rock FP Top Shelf 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.