Load Specifications
Load data in caliber .357 SIG with .358 | 148gr | Rim Rock SWC bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan SP 2, Rottweil P 806 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>> | 84% | 39,233 psi | 89% | 1181 fps | 100% |
| Accurate No. 5² | <<locked>> | 68% | 36,434 psi | 82% | 1234 fps | 97% |
| Accurate Solo 1000 | <<locked>> | 88% | 39,537 psi | 89% | 1106 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 38,537 psi | 87% | 1152 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 30,182 psi | 68% | 1152 fps | 93% |
| ADI AP 70N² | <<locked>> | 76% | 37,449 psi | 85% | 1158 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,189 psi | 89% | 1001 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 37,869 psi | 86% | 1024 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 39,320 psi | 89% | 1076 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 39,595 psi | 90% | 1122 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 36,535 psi | 83% | 1125 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 37,434 psi | 85% | 1201 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 38,943 psi | 88% | 1119 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 31,444 psi | 71% | 1142 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 92% | 38,232 psi | 86% | 1296 fps | 95.5% |
| Alliant RED DOT | <<locked>> | 92% | 39,798 psi | 90% | 1102 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 38,479 psi | 87% | 1214 fps | 100% |
| Alliant UNIQUE | <<locked>> | 92% | 38,203 psi | 86% | 1220 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 35,911 psi | 81% | 1076 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 32,082 psi | 73% | 1060 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 35,911 psi | 81% | 1106 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 88% | 38,450 psi | 87% | 1165 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 39,755 psi | 90% | 1017 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 38,261 psi | 86% | 1132 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 38,711 psi | 88% | 1243 fps | 98.8% |
| Hodgdon Longshot² | <<locked>> | 72% | 37,768 psi | 85% | 1230 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,779 psi | 31% | 761 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 37,449 psi | 85% | 1158 fps | 100% |
| Lovex D036² | <<locked>> | 68% | 36,376 psi | 82% | 1234 fps | 97% |
| Lovex S011² | <<locked>> | 76% | 39,479 psi | 89% | 1132 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 39,566 psi | 89% | 1191 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 38,580 psi | 87% | 1148 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 37,898 psi | 86% | 1152 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 36,216 psi | 82% | 1106 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,986 psi | 88% | 1112 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 37,420 psi | 85% | 1053 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 38,566 psi | 87% | 1220 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 39,566 psi | 89% | 1243 fps | 99.7% |
| Ramshot Zip² | <<locked>> | 64% | 36,941 psi | 84% | 1129 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 38,914 psi | 88% | 1145 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,082 psi | 27% | 751 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 39,943 psi | 90% | 1234 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 96% | 39,943 psi | 90% | 1306 fps | 90.4% |
| Rottweil P 801² | <<locked>> | 76% | 39,421 psi | 89% | 1119 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 36,753 psi | 83% | 1316 fps | 99% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 36,376 psi | 82% | 1234 fps | 97% |
| SNPE Vectan A0 | <<locked>> | 96% | 39,117 psi | 88% | 1184 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 37,246 psi | 84% | 1122 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 39,769 psi | 90% | 1165 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 39,291 psi | 89% | 1033 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 37,217 psi | 84% | 1211 fps | 99.1% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 38,740 psi | 88% | 1161 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 88% | 38,130 psi | 86% | 1309 fps | 97.1% |
| Somchem MP200 | <<locked>> | 84% | 37,173 psi | 84% | 1198 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 39,653 psi | 90% | 1201 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 38,856 psi | 88% | 1273 fps | 93.2% |
| Vihtavuori 3N37 | <<locked>> | 92% | 37,362 psi | 84% | 1234 fps | 99.6% |
| Vihtavuori N310² | <<locked>> | 68% | 39,610 psi | 90% | 1040 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 39,320 psi | 89% | 1119 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,990 psi | 56% | 915 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 38,464 psi | 87% | 1168 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 40,001 psi | 90% | 1204 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 39,610 psi | 90% | 1250 fps | 99.9% |
| Winchester 231² | <<locked>> | 72% | 36,941 psi | 84% | 1129 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 38,247 psi | 86% | 1243 fps | 99.3% |
| Winchester AutoComp | <<locked>> | 92% | 37,086 psi | 84% | 1155 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. 2² | <<locked>> | 60% | 18,753 psi | 42% | 909 fps | 96.1% |
| Accurate No. 5*² | <<locked>> | 60% | 27,282 psi | 62% | 1109 fps | 93.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 20,465 psi | 46% | 883 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,795 psi | 38% | 869 fps | 99.9% |
| ADI AP 100* | <<locked>> | 84% | 20,378 psi | 46% | 984 fps | 86.3% |
| ADI AP 70N² | <<locked>> | 60% | 23,917 psi | 54% | 997 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,032 psi | 52% | 833 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,959 psi | 50% | 846 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,842 psi | 47% | 866 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,712 psi | 49% | 915 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 17,231 psi | 39% | 876 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 21,712 psi | 49% | 988 fps | 99.5% |
| Alliant Green Dot² | <<locked>> | 60% | 19,580 psi | 44% | 886 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,328 psi | 28% | 791 fps | 92.7% |
| Alliant POWER PISTOL*² | <<locked>> | 72% | 21,988 psi | 50% | 1047 fps | 86.7% |
| Alliant RED DOT² | <<locked>> | 60% | 20,015 psi | 45% | 869 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 24,758 psi | 56% | 1040 fps | 99.8% |
| Alliant UNIQUE² | <<locked>> | 60% | 16,737 psi | 38% | 899 fps | 96.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 19,102 psi | 43% | 876 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,618 psi | 26% | 751 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,914 psi | 45% | 915 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 18,536 psi | 42% | 909 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,293 psi | 53% | 846 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 33,170 psi | 75% | 1083 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 23,235 psi | 53% | 1033 fps | 93.2% |
| Hodgdon Longshot² | <<locked>> | 60% | 25,686 psi | 58% | 1073 fps | 96.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,208 psi | 14% | 548 fps | 98.3% |
| Hodgdon Universal² | <<locked>> | 60% | 20,218 psi | 46% | 938 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 27,238 psi | 62% | 1106 fps | 93.3% |
| Lovex S011² | <<locked>> | 60% | 25,440 psi | 58% | 978 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 19,058 psi | 43% | 932 fps | 99.4% |
| Maxam CSB 1² | <<locked>> | 60% | 15,403 psi | 35% | 837 fps | 99.6% |
| Maxam CSB 2² | <<locked>> | 60% | 16,679 psi | 38% | 883 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,898 psi | 40% | 869 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 20,117 psi | 45% | 892 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,191 psi | 50% | 883 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 23,206 psi | 52% | 1020 fps | 98.5% |
| Ramshot True Blue² | <<locked>> | 60% | 26,121 psi | 59% | 1076 fps | 96.5% |
| Ramshot Zip² | <<locked>> | 60% | 31,966 psi | 72% | 1076 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,480 psi | 49% | 948 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 6,034 psi | 14% | 548 fps | 94.4% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 14,402 psi | 33% | 866 fps | 97.2% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 31,386 psi | 71% | 1194 fps | 86.4% |
| Rottweil P 801² | <<locked>> | 60% | 25,019 psi | 57% | 968 fps | 100% |
| Rottweil P 806*² | 7.6 gr | 72% | 14,315 psi | 32% | 942 fps | 85.5% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 27,238 psi | 62% | 1106 fps | 93.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 16,128 psi | 36% | 856 fps | 96.3% |
| SNPE Vectan A1² | <<locked>> | 60% | 20,102 psi | 45% | 912 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 19,290 psi | 44% | 909 fps | 99.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,105 psi | 54% | 876 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 64% | 15,084 psi | 34% | 856 fps | 87.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,782 psi | 42% | 906 fps | 100% |
| SNPE Vectan SP 2*² | 5.9 gr | 64% | 17,985 psi | 41% | 988 fps | 85.5% |
| Somchem MP200² | <<locked>> | 60% | 19,493 psi | 44% | 948 fps | 97.5% |
| Somchem MS200² | <<locked>> | 60% | 17,434 psi | 39% | 892 fps | 98.1% |
| Somchem S221*² | <<locked>> | 68% | 26,513 psi | 60% | 1106 fps | 87.1% |
| Vihtavuori 3N37*² | 5 gr | 60% | 14,866 psi | 34% | 876 fps | 88.4% |
| Vihtavuori N310² | <<locked>> | 60% | 31,952 psi | 72% | 968 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 20,610 psi | 47% | 912 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,370 psi | 23% | 679 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 19,087 psi | 43% | 932 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 16,998 psi | 38% | 892 fps | 97.4% |
| Vihtavuori N350*² | <<locked>> | 60% | 12,444 psi | 28% | 810 fps | 85.4% |
| Winchester 231² | <<locked>> | 60% | 26,469 psi | 60% | 1010 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 32,416 psi | 73% | 1171 fps | 98.1% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,476 psi | 37% | 873 fps | 99.5% |
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 | 148gr | Rim Rock SWC. Rottweil P 806 delivers the highest muzzle velocity at 1,316 fps; across all powders the maximum-charge window runs from 751 fps to 1,316 fps. ADI AP 100 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. 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. SNPE Vectan SP 2, Rottweil P 806, Vihtavuori 3N37 rank at the top here: for .357 SIG with the .358 | 148gr | Rim Rock SWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100 burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, ADI AP 100 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.