Load Specifications
Load data in caliber .357 SIG with .358 | 155gr | Rim Rock DEWC bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Vihtavuori 3N37 and Alliant UNIQUE.
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% | 39,117 psi | 88% | 1148 fps | 100% |
| Accurate No. 5² | <<locked>> | 68% | 37,855 psi | 86% | 1220 fps | 97.9% |
| Accurate Solo 1000 | <<locked>> | 84% | 37,826 psi | 86% | 1060 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 39,987 psi | 90% | 1132 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 30,516 psi | 69% | 1125 fps | 93.8% |
| ADI AP 70N² | <<locked>> | 76% | 38,783 psi | 88% | 1138 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 37,072 psi | 84% | 955 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 38,841 psi | 88% | 1001 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 37,492 psi | 85% | 1030 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 39,421 psi | 89% | 1089 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 37,855 psi | 86% | 1106 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 38,769 psi | 88% | 1181 fps | 100% |
| Alliant Green Dot | <<locked>> | 84% | 36,071 psi | 82% | 1060 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 32,721 psi | 74% | 1125 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 92% | 39,885 psi | 90% | 1283 fps | 96.6% |
| Alliant RED DOT | <<locked>> | 88% | 38,000 psi | 86% | 1053 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 39,813 psi | 90% | 1194 fps | 100% |
| Alliant UNIQUE | <<locked>> | 92% | 38,406 psi | 87% | 1188 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 40,016 psi | 90% | 1083 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 33,315 psi | 75% | 1040 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 37,231 psi | 84% | 1086 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 36,042 psi | 81% | 1115 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 39,784 psi | 90% | 1007 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 38,189 psi | 86% | 1102 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 72% | 35,665 psi | 81% | 1178 fps | 98.6% |
| Hodgdon Longshot² | <<locked>> | 72% | 39,291 psi | 89% | 1214 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,648 psi | 31% | 738 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 38,783 psi | 88% | 1138 fps | 100% |
| Lovex D036² | <<locked>> | 68% | 37,840 psi | 86% | 1220 fps | 97.9% |
| Lovex S011² | <<locked>> | 72% | 36,347 psi | 82% | 1070 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 39,653 psi | 90% | 1158 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 39,914 psi | 90% | 1129 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 39,465 psi | 89% | 1132 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 37,420 psi | 85% | 1086 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 37,376 psi | 84% | 1066 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 38,537 psi | 87% | 1030 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 38,783 psi | 88% | 1188 fps | 100% |
| Ramshot True Blue² | <<locked>> | 68% | 36,390 psi | 82% | 1178 fps | 99.6% |
| Ramshot Zip² | <<locked>> | 64% | 38,159 psi | 86% | 1106 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 39,001 psi | 88% | 1112 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,531 psi | 28% | 738 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 92% | 37,550 psi | 85% | 1175 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 92% | 37,086 psi | 84% | 1240 fps | 90.1% |
| Rottweil P 801² | <<locked>> | 72% | 36,709 psi | 83% | 1063 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 38,014 psi | 86% | 1296 fps | 99.5% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 37,840 psi | 86% | 1220 fps | 97.9% |
| SNPE Vectan A0 | <<locked>> | 92% | 36,738 psi | 83% | 1129 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 38,421 psi | 87% | 1102 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 37,289 psi | 84% | 1109 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 37,376 psi | 84% | 991 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 38,682 psi | 87% | 1194 fps | 99.6% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 36,158 psi | 82% | 1106 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 84% | 35,172 psi | 80% | 1240 fps | 96.8% |
| Somchem MP200 | <<locked>> | 84% | 38,551 psi | 87% | 1178 fps | 100% |
| Somchem MS200 | <<locked>> | 88% | 37,086 psi | 84% | 1142 fps | 100% |
| Somchem S221*² | <<locked>> | 76% | 35,070 psi | 79% | 1198 fps | 92.5% |
| Vihtavuori 3N37 | <<locked>> | 92% | 39,044 psi | 88% | 1220 fps | 99.9% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 30,153 psi | 68% | 1145 fps | 87.6% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 24,772 psi | 56% | 1112 fps | 88.3% |
| Vihtavuori N310² | <<locked>> | 68% | 39,073 psi | 88% | 1004 fps | 100% |
| Vihtavuori N320 | <<locked>> | 80% | 36,230 psi | 82% | 1060 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 25,904 psi | 59% | 899 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 38,566 psi | 87% | 1135 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 37,362 psi | 84% | 1145 fps | 100% |
| Vihtavuori N350 | <<locked>> | 96% | 36,158 psi | 82% | 1184 fps | 99.8% |
| Winchester 231² | <<locked>> | 72% | 38,159 psi | 86% | 1106 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 38,508 psi | 87% | 1214 fps | 99.6% |
| Winchester AutoComp | <<locked>> | 92% | 38,450 psi | 87% | 1135 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% | 19,435 psi | 44% | 899 fps | 97% |
| Accurate No. 5*² | <<locked>> | 60% | 28,398 psi | 64% | 1096 fps | 94.7% |
| Accurate Solo 1000² | <<locked>> | 60% | 21,074 psi | 48% | 869 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 17,419 psi | 39% | 856 fps | 100% |
| ADI AP 100* | <<locked>> | 80% | 19,116 psi | 43% | 938 fps | 86.1% |
| ADI AP 70N² | <<locked>> | 60% | 24,801 psi | 56% | 981 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,583 psi | 53% | 814 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 22,539 psi | 51% | 830 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 21,466 psi | 49% | 853 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 22,423 psi | 51% | 899 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 17,898 psi | 40% | 866 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 22,510 psi | 51% | 974 fps | 99.8% |
| Alliant Green Dot² | <<locked>> | 60% | 20,160 psi | 46% | 869 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,763 psi | 29% | 784 fps | 94.1% |
| Alliant POWER PISTOL*² | <<locked>> | 68% | 20,610 psi | 47% | 994 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 19,624 psi | 44% | 840 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 25,599 psi | 58% | 1027 fps | 100% |
| Alliant UNIQUE² | 4.1 gr | 60% | 17,390 psi | 39% | 889 fps | 97.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 19,769 psi | 45% | 860 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,082 psi | 27% | 741 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 20,697 psi | 47% | 902 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 31,473 psi | 71% | 1066 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 18,478 psi | 42% | 774 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 34,301 psi | 78% | 1063 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 23,409 psi | 53% | 1010 fps | 94% |
| Hodgdon Longshot² | <<locked>> | 60% | 25,817 psi | 58% | 1047 fps | 96.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,411 psi | 14% | 541 fps | 99% |
| Hodgdon Universal² | <<locked>> | 60% | 20,088 psi | 45% | 909 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 28,340 psi | 64% | 1096 fps | 94.7% |
| Lovex S011² | <<locked>> | 60% | 26,237 psi | 59% | 961 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 19,841 psi | 45% | 922 fps | 99.8% |
| Maxam CSB 1² | <<locked>> | 60% | 15,969 psi | 36% | 823 fps | 99.9% |
| Maxam CSB 2² | <<locked>> | 60% | 16,592 psi | 38% | 856 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 18,507 psi | 42% | 856 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 20,769 psi | 47% | 876 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,872 psi | 52% | 866 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 24,091 psi | 54% | 1007 fps | 99.2% |
| Ramshot True Blue² | <<locked>> | 60% | 27,238 psi | 62% | 1063 fps | 97.5% |
| Ramshot Zip² | <<locked>> | 60% | 33,127 psi | 75% | 1060 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 22,394 psi | 51% | 932 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,237 psi | 14% | 545 fps | 95.6% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 15,011 psi | 34% | 856 fps | 98.2% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 29,080 psi | 66% | 1135 fps | 86% |
| Rottweil P 801² | <<locked>> | 60% | 25,962 psi | 59% | 951 fps | 100% |
| Rottweil P 806*² | 7.6 gr | 72% | 15,200 psi | 34% | 942 fps | 87.7% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 28,340 psi | 64% | 1096 fps | 94.7% |
| SNPE Vectan A0² | <<locked>> | 60% | 16,012 psi | 36% | 830 fps | 96.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 20,769 psi | 47% | 899 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 19,943 psi | 45% | 896 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,729 psi | 56% | 856 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 13,460 psi | 30% | 794 fps | 85.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 19,450 psi | 44% | 892 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 64% | 18,855 psi | 43% | 981 fps | 87.3% |
| Somchem MP200² | <<locked>> | 60% | 19,421 psi | 44% | 922 fps | 98% |
| Somchem MS200² | <<locked>> | 60% | 18,057 psi | 41% | 883 fps | 98.8% |
| Somchem S221*² | <<locked>> | 64% | 23,685 psi | 54% | 1030 fps | 86% |
| Vihtavuori 3N37*² | 4.9 gr | 60% | 14,881 psi | 34% | 853 fps | 89.4% |
| Vihtavuori 3N38* | <<locked>> | 96% | 27,369 psi | 62% | 1106 fps | 85.9% |
| Vihtavuori N105* | <<locked>> | 96% | 22,365 psi | 51% | 1070 fps | 86.2% |
| Vihtavuori N310² | <<locked>> | 60% | 31,444 psi | 71% | 935 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 21,379 psi | 48% | 896 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,776 psi | 24% | 669 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 19,029 psi | 43% | 906 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 16,882 psi | 38% | 866 fps | 97.8% |
| Vihtavuori N350*² | <<locked>> | 60% | 12,981 psi | 29% | 804 fps | 87.3% |
| Winchester 231² | <<locked>> | 60% | 27,369 psi | 62% | 994 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 33,765 psi | 76% | 1161 fps | 98.8% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,433 psi | 37% | 846 fps | 99.7% |
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 68 powders for .357 SIG loaded with the .358 | 155gr | Rim Rock DEWC. Rottweil P 806 delivers the highest muzzle velocity at 1,296 fps; across all powders the maximum-charge window runs from 738 fps to 1,296 fps. ADI AP 100 gives the best case fill at 100 %, and 49 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 28–90 %, 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. Rottweil P 806, Vihtavuori 3N37, Alliant UNIQUE rank at the top here: for .357 SIG with the .358 | 155gr | Rim Rock DEWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, ReloadSwiss RS 24, Somchem S221 burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate No. 5, Accurate Solo 1000 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.