Load Specifications
Load data in caliber .357 SIG with .358 | 125gr | Rim Rock TC 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 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% | 36,564 psi | 83% | 1293 fps | 99.9% |
| Accurate No. 5² | <<locked>> | 72% | 38,580 psi | 87% | 1401 fps | 96% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,218 psi | 86% | 1234 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,813 psi | 90% | 1309 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,601 psi | 62% | 1237 fps | 89.1% |
| ADI AP 70N | <<locked>> | 80% | 38,276 psi | 87% | 1316 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,116 psi | 86% | 1119 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 36,274 psi | 82% | 1135 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 39,479 psi | 89% | 1217 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 36,477 psi | 82% | 1234 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 37,840 psi | 86% | 1283 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,899 psi | 88% | 1368 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,639 psi | 90% | 1273 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,196 psi | 66% | 1247 fps | 99.9% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 38,856 psi | 88% | 1447 fps | 93.7% |
| Alliant RED DOT | <<locked>> | 92% | 38,537 psi | 87% | 1230 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 35,940 psi | 81% | 1335 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 38,232 psi | 86% | 1371 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 36,550 psi | 83% | 1224 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,269 psi | 66% | 1161 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,043 psi | 86% | 1263 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 37,231 psi | 84% | 1302 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,203 psi | 86% | 1155 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,624 psi | 90% | 1289 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 35,984 psi | 81% | 1352 fps | 96.8% |
| Hodgdon Longshot² | <<locked>> | 72% | 35,331 psi | 80% | 1345 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,299 psi | 28% | 830 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 38,276 psi | 87% | 1316 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 38,522 psi | 87% | 1401 fps | 95.9% |
| Lovex S011² | <<locked>> | 76% | 37,608 psi | 85% | 1253 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,143 psi | 82% | 1302 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,320 psi | 89% | 1299 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 38,305 psi | 87% | 1306 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,971 psi | 86% | 1266 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,318 psi | 84% | 1237 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 37,985 psi | 86% | 1194 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 35,795 psi | 81% | 1332 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 37,115 psi | 84% | 1362 fps | 98.4% |
| Ramshot Zip² | <<locked>> | 68% | 39,407 psi | 89% | 1296 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 38,305 psi | 87% | 1289 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,544 psi | 24% | 807 fps | 99.1% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,883 psi | 83% | 1355 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 36,666 psi | 83% | 1237 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 32,256 psi | 73% | 1404 fps | 96.3% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 38,522 psi | 87% | 1401 fps | 95.9% |
| SNPE Vectan A0 | <<locked>> | 96% | 37,028 psi | 84% | 1306 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,189 psi | 89% | 1283 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,942 psi | 86% | 1289 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,565 psi | 85% | 1148 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 34,853 psi | 79% | 1322 fps | 97.4% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,479 psi | 89% | 1316 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 92% | 38,827 psi | 88% | 1467 fps | 95.6% |
| Somchem MP200 | <<locked>> | 88% | 38,203 psi | 86% | 1355 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,608 psi | 85% | 1325 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 35,955 psi | 81% | 1378 fps | 89.7% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,116 psi | 86% | 1388 fps | 98.9% |
| Vihtavuori N310² | <<locked>> | 68% | 36,201 psi | 82% | 1138 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,958 psi | 90% | 1270 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,698 psi | 51% | 1007 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 39,160 psi | 89% | 1322 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 37,608 psi | 85% | 1329 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 35,781 psi | 81% | 1355 fps | 98.6% |
| Winchester 231² | <<locked>> | 76% | 39,407 psi | 89% | 1296 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,841 psi | 88% | 1280 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 39,827 psi | 90% | 1407 fps | 98.6% |
| Winchester AutoComp | <<locked>> | 96% | 38,812 psi | 88% | 1319 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% | 17,564 psi | 40% | 991 fps | 93.1% |
| Accurate No. 5*² | <<locked>> | 60% | 25,483 psi | 58% | 1201 fps | 90% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,043 psi | 43% | 971 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,127 psi | 34% | 938 fps | 98.6% |
| ADI AP 100* | <<locked>> | 92% | 23,018 psi | 52% | 1152 fps | 85.8% |
| ADI AP 70N² | <<locked>> | 60% | 21,944 psi | 50% | 1089 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,278 psi | 50% | 928 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,900 psi | 47% | 938 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,421 psi | 44% | 958 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,827 psi | 45% | 1004 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,766 psi | 36% | 955 fps | 99.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,436 psi | 46% | 1079 fps | 98% |
| Alliant Green Dot² | <<locked>> | 60% | 17,956 psi | 41% | 968 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 10,776 psi | 24% | 837 fps | 87.8% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 25,672 psi | 58% | 1237 fps | 86.8% |
| Alliant RED DOT² | <<locked>> | 60% | 17,753 psi | 40% | 945 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,902 psi | 52% | 1132 fps | 98.5% |
| Alliant UNIQUE*² | 4.4 gr | 60% | 14,765 psi | 33% | 958 fps | 93.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,361 psi | 39% | 955 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,225 psi | 23% | 807 fps | 99.2% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,318 psi | 41% | 1004 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 28,863 psi | 65% | 1201 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,231 psi | 39% | 879 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,459 psi | 71% | 1201 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,002 psi | 47% | 1106 fps | 89.1% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,134 psi | 52% | 1148 fps | 92.8% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,366 psi | 12% | 587 fps | 94.8% |
| Hodgdon Universal² | <<locked>> | 60% | 17,970 psi | 41% | 1010 fps | 99.8% |
| Lovex D036*² | <<locked>> | 60% | 25,440 psi | 58% | 1201 fps | 89.9% |
| Lovex S011² | <<locked>> | 60% | 24,033 psi | 54% | 1079 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,405 psi | 39% | 1010 fps | 97.6% |
| Maxam CSB 1² | <<locked>> | 60% | 14,533 psi | 33% | 919 fps | 98.3% |
| Maxam CSB 2² | <<locked>> | 60% | 14,489 psi | 33% | 951 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,100 psi | 39% | 965 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,463 psi | 42% | 978 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,653 psi | 47% | 974 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 21,480 psi | 49% | 1109 fps | 96.3% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,424 psi | 55% | 1168 fps | 93.7% |
| Ramshot Zip² | <<locked>> | 60% | 30,255 psi | 68% | 1191 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,551 psi | 44% | 1040 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,105 psi | 12% | 581 fps | 89% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,169 psi | 30% | 935 fps | 93.9% |
| Rottweil P 801² | <<locked>> | 60% | 22,960 psi | 52% | 1063 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 18,333 psi | 41% | 1155 fps | 87.3% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,440 psi | 58% | 1201 fps | 89.9% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,518 psi | 33% | 919 fps | 92.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,782 psi | 42% | 1001 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,999 psi | 41% | 991 fps | 98.8% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,844 psi | 54% | 984 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 17,245 psi | 39% | 1010 fps | 87% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 16,824 psi | 38% | 978 fps | 99.2% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 20,784 psi | 47% | 1165 fps | 85.3% |
| Somchem MP200*² | 5.1 gr | 60% | 17,753 psi | 40% | 1024 fps | 94.6% |
| Somchem MS200² | <<locked>> | 60% | 16,244 psi | 37% | 971 fps | 95.7% |
| Somchem S221*² | <<locked>> | 76% | 31,401 psi | 71% | 1309 fps | 87.4% |
| Vihtavuori 3N37*² | 5.7 gr | 64% | 14,707 psi | 33% | 971 fps | 85.4% |
| Vihtavuori N310² | <<locked>> | 60% | 29,501 psi | 67% | 1066 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,536 psi | 42% | 994 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 8,804 psi | 20% | 728 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,665 psi | 38% | 1001 fps | 99.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 14,982 psi | 34% | 948 fps | 93.9% |
| Vihtavuori N350*² | <<locked>> | 68% | 14,649 psi | 33% | 968 fps | 85.7% |
| Winchester 231² | <<locked>> | 60% | 24,424 psi | 55% | 1109 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,055 psi | 77% | 1227 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 30,255 psi | 68% | 1276 fps | 95.8% |
| Winchester AutoComp ² | <<locked>> | 60% | 14,431 psi | 33% | 928 fps | 97.3% |
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 .358 | 125gr | Rim Rock TC Top Shelf. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,467 fps; across all powders the maximum-charge window runs from 807 fps to 1,467 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 24–90 %, 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 .358 | 125gr | Rim Rock TC Top Shelf they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, Somchem S221 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.