Load Specifications
Load data in caliber .357 SIG with .358 | 125gr | Rim Rock RNFP BP Lube bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, Vihtavuori 3N37 and ReloadSwiss RS 20.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 84% | 38,827 psi | 88% | 1332 fps | 100% |
| Accurate No. 5² | <<locked>> | 68% | 35,679 psi | 81% | 1375 fps | 95.4% |
| Accurate Solo 1000 | <<locked>> | 88% | 39,436 psi | 89% | 1257 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 38,305 psi | 87% | 1302 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 29,733 psi | 67% | 1283 fps | 90.9% |
| ADI AP 70N² | <<locked>> | 76% | 37,318 psi | 84% | 1312 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,697 psi | 90% | 1145 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 37,594 psi | 85% | 1158 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 38,493 psi | 87% | 1217 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 38,058 psi | 86% | 1260 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 39,726 psi | 90% | 1309 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 36,405 psi | 82% | 1348 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 38,653 psi | 87% | 1270 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 31,024 psi | 70% | 1280 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 38,014 psi | 86% | 1450 fps | 93.9% |
| Alliant RED DOT | <<locked>> | 88% | 36,521 psi | 83% | 1217 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 38,029 psi | 86% | 1371 fps | 100% |
| Alliant UNIQUE | <<locked>> | 92% | 37,072 psi | 84% | 1365 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 39,044 psi | 88% | 1257 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 31,241 psi | 71% | 1191 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 35,389 psi | 80% | 1247 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 88% | 38,334 psi | 87% | 1319 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 39,378 psi | 89% | 1175 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 37,057 psi | 84% | 1273 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 38,174 psi | 86% | 1394 fps | 97.8% |
| Hodgdon Longshot² | <<locked>> | 72% | 37,724 psi | 85% | 1385 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,329 psi | 30% | 853 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 37,318 psi | 84% | 1312 fps | 100% |
| Lovex D036² | <<locked>> | 68% | 35,665 psi | 81% | 1378 fps | 95.5% |
| Lovex S011² | <<locked>> | 76% | 40,016 psi | 90% | 1289 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 38,508 psi | 87% | 1339 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 37,942 psi | 86% | 1296 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 37,405 psi | 85% | 1302 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 39,175 psi | 89% | 1286 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,667 psi | 87% | 1260 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 39,566 psi | 89% | 1217 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 37,391 psi | 85% | 1365 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 39,421 psi | 89% | 1401 fps | 99.1% |
| Ramshot Zip² | <<locked>> | 64% | 35,708 psi | 81% | 1266 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 37,579 psi | 85% | 1286 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,140 psi | 27% | 850 fps | 99.9% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 38,914 psi | 88% | 1385 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 96% | 39,595 psi | 90% | 1457 fps | 88.3% |
| Rottweil P 801² | <<locked>> | 76% | 39,508 psi | 89% | 1273 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 35,114 psi | 79% | 1453 fps | 97.5% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 35,665 psi | 81% | 1378 fps | 95.5% |
| SNPE Vectan A0 | <<locked>> | 96% | 38,827 psi | 88% | 1335 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 37,594 psi | 85% | 1276 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 39,668 psi | 90% | 1319 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,783 psi | 88% | 1171 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 36,999 psi | 84% | 1362 fps | 98.2% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 38,116 psi | 86% | 1312 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 88% | 38,232 psi | 86% | 1470 fps | 95.8% |
| Somchem MP200 | <<locked>> | 84% | 36,796 psi | 83% | 1352 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 39,566 psi | 89% | 1358 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 37,927 psi | 86% | 1417 fps | 91.1% |
| Vihtavuori 3N37 | <<locked>> | 92% | 36,274 psi | 82% | 1378 fps | 98.8% |
| Vihtavuori N310² | <<locked>> | 68% | 38,276 psi | 87% | 1168 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 38,740 psi | 88% | 1266 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,366 psi | 55% | 1033 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 37,739 psi | 85% | 1319 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 39,639 psi | 90% | 1358 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 38,435 psi | 87% | 1398 fps | 99.3% |
| Winchester 231² | <<locked>> | 72% | 36,854 psi | 83% | 1280 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 37,028 psi | 84% | 1385 fps | 98.3% |
| Winchester AutoComp | <<locked>> | 92% | 37,304 psi | 84% | 1312 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% | 18,202 psi | 41% | 1014 fps | 94.1% |
| Accurate No. 5*² | <<locked>> | 60% | 26,977 psi | 61% | 1237 fps | 91.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,928 psi | 45% | 994 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,723 psi | 38% | 978 fps | 99.4% |
| ADI AP 100* | <<locked>> | 88% | 22,408 psi | 51% | 1148 fps | 85.9% |
| ADI AP 70N² | <<locked>> | 60% | 23,714 psi | 54% | 1122 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,264 psi | 53% | 951 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,727 psi | 49% | 958 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,552 psi | 46% | 981 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,900 psi | 47% | 1027 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,592 psi | 38% | 974 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 21,147 psi | 48% | 1102 fps | 98.6% |
| Alliant Green Dot² | <<locked>> | 60% | 19,827 psi | 45% | 1007 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,096 psi | 27% | 879 fps | 90.4% |
| Alliant POWER PISTOL*² | <<locked>> | 76% | 24,323 psi | 55% | 1220 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 19,043 psi | 43% | 971 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 24,279 psi | 55% | 1165 fps | 99.1% |
| Alliant UNIQUE² | 4.7 gr | 60% | 16,331 psi | 37% | 1004 fps | 95.1% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 19,043 psi | 43% | 991 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,618 psi | 26% | 846 fps | 99.9% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,464 psi | 44% | 1027 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 18,449 psi | 42% | 1024 fps | 99.7% |
| Hodgdon Clays² | <<locked>> | 60% | 18,144 psi | 41% | 899 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 32,706 psi | 74% | 1224 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,539 psi | 51% | 1145 fps | 90.8% |
| Hodgdon Longshot*² | <<locked>> | 60% | 24,772 psi | 56% | 1188 fps | 94.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,382 psi | 14% | 627 fps | 97.4% |
| Hodgdon Universal² | <<locked>> | 60% | 19,798 psi | 45% | 1053 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 26,977 psi | 61% | 1237 fps | 91.4% |
| Lovex S011² | <<locked>> | 60% | 24,627 psi | 56% | 1099 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 19,014 psi | 43% | 1050 fps | 98.7% |
| Maxam CSB 1² | <<locked>> | 60% | 15,432 psi | 35% | 942 fps | 99% |
| Maxam CSB 2² | <<locked>> | 60% | 15,751 psi | 36% | 978 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 18,043 psi | 41% | 988 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,450 psi | 44% | 1001 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,684 psi | 51% | 1014 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,626 psi | 51% | 1138 fps | 97.2% |
| Ramshot True Blue² | <<locked>> | 60% | 26,020 psi | 59% | 1207 fps | 95% |
| Ramshot Zip² | <<locked>> | 60% | 31,517 psi | 71% | 1214 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,611 psi | 49% | 1076 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,845 psi | 13% | 610 fps | 92.1% |
| ReloadSwiss RS 20² | 4.9 gr | 60% | 14,489 psi | 33% | 974 fps | 95.7% |
| ReloadSwiss RS 24* | <<locked>> | 92% | 34,751 psi | 79% | 1391 fps | 86.1% |
| Rottweil P 801² | <<locked>> | 60% | 24,976 psi | 56% | 1096 fps | 100% |
| Rottweil P 806* | <<locked>> | 80% | 18,275 psi | 41% | 1152 fps | 87.6% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,977 psi | 61% | 1237 fps | 91.4% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,780 psi | 36% | 955 fps | 94.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 20,102 psi | 45% | 1030 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 19,261 psi | 44% | 1024 fps | 99.4% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,569 psi | 56% | 1001 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 16,592 psi | 38% | 997 fps | 86.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,362 psi | 42% | 1014 fps | 99.7% |
| SNPE Vectan SP 2*² | <<locked>> | 68% | 20,030 psi | 45% | 1152 fps | 85.1% |
| Somchem MP200² | <<locked>> | 60% | 19,131 psi | 43% | 1060 fps | 96% |
| Somchem MS200² | <<locked>> | 60% | 17,666 psi | 40% | 1010 fps | 97.1% |
| Somchem S221*² | <<locked>> | 72% | 29,428 psi | 67% | 1289 fps | 86.9% |
| Vihtavuori 3N37*² | 5.7 gr | 60% | 14,330 psi | 32% | 965 fps | 85.3% |
| Vihtavuori N310² | <<locked>> | 60% | 30,472 psi | 69% | 1086 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 20,479 psi | 46% | 1030 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,993 psi | 23% | 758 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 18,347 psi | 41% | 1040 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 16,389 psi | 37% | 991 fps | 95.6% |
| Vihtavuori N350*² | <<locked>> | 64% | 14,199 psi | 32% | 958 fps | 85.6% |
| Winchester 231² | <<locked>> | 60% | 25,860 psi | 58% | 1135 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 32,039 psi | 72% | 1316 fps | 96.9% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,751 psi | 36% | 965 fps | 98.4% |
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 43 powders for .357 SIG loaded with the .358 | 125gr | Rim Rock RNFP BP Lube. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,470 fps; across all powders the maximum-charge window runs from 850 fps to 1,470 fps. Alliant Herco gives the best case fill at 100 %, and 43 of the 43 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 27–90 %, leaving at least 10 % headroom. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss 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. Alliant UNIQUE, Vihtavuori 3N37, ReloadSwiss RS 20 rank at the top here: for .357 SIG with the .358 | 125gr | Rim Rock RNFP BP Lube they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant POWER PISTOL burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, Alliant Herco, Baschieri & Pellagri 102 Pistol 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.