Load Specifications
Load data in caliber .357 Mag. with .358 | 180gr | LOS HP bullet and 66 powders. The key underlying parameters are shown in the table above.
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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 38,406 psi | 88% | 1145 fps | 100% |
| Accurate No. 7² | <<locked>> | 72% | 36,579 psi | 84% | 1280 fps | 95.4% |
| Accurate No. 9* | <<locked>> | 80% | 36,201 psi | 83% | 1266 fps | 90% |
| Accurate Solo 1000² | <<locked>> | 72% | 36,172 psi | 83% | 1037 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 35,679 psi | 82% | 1079 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 36,390 psi | 84% | 1266 fps | 91.4% |
| ADI AP 100 | <<locked>> | 92% | 36,492 psi | 84% | 1220 fps | 99.9% |
| ADI AP 70N² | <<locked>> | 64% | 38,159 psi | 88% | 1112 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 37,652 psi | 87% | 961 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 36,114 psi | 83% | 978 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 38,928 psi | 89% | 1033 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 36,056 psi | 83% | 1047 fps | 100% |
| Alliant 2400* | <<locked>> | 92% | 37,463 psi | 86% | 1302 fps | 87.8% |
| Alliant BE-86² | <<locked>> | 76% | 37,666 psi | 87% | 1089 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 35,346 psi | 81% | 1253 fps | 93.9% |
| Alliant BULLSEYE² | <<locked>> | 68% | 37,246 psi | 86% | 1161 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 38,885 psi | 89% | 1076 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 38,203 psi | 88% | 1171 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 36,274 psi | 83% | 1257 fps | 99.7% |
| Alliant RED DOT² | <<locked>> | 76% | 37,507 psi | 86% | 1037 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 37,840 psi | 87% | 1171 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 36,506 psi | 84% | 1155 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 38,943 psi | 90% | 1063 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 37,565 psi | 86% | 1063 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 36,085 psi | 83% | 1060 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,927 psi | 87% | 991 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 38,638 psi | 89% | 1217 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 20,059 psi | 46% | 817 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 39,247 psi | 90% | 1125 fps | 100% |
| Lovex D037.1² | <<locked>> | 72% | 36,579 psi | 84% | 1280 fps | 95.4% |
| Lovex D037.2* | <<locked>> | 80% | 37,043 psi | 85% | 1276 fps | 90.4% |
| Lovex S011² | <<locked>> | 64% | 38,058 psi | 87% | 1079 fps | 100% |
| Lovex S020² | <<locked>> | 68% | 35,665 psi | 82% | 1109 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 36,811 psi | 85% | 1086 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 38,174 psi | 88% | 1096 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 37,318 psi | 86% | 1073 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 36,274 psi | 83% | 1043 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 36,230 psi | 83% | 1001 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 92% | 36,651 psi | 84% | 1306 fps | 88.6% |
| Ramshot Silhouette² | <<locked>> | 64% | 37,347 psi | 86% | 1168 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 36,071 psi | 83% | 1060 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,405 psi | 42% | 823 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 76% | 35,462 psi | 82% | 1138 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 38,406 psi | 88% | 1286 fps | 97.6% |
| Rottweil P 806 | <<locked>> | 80% | 34,882 psi | 80% | 1250 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 37,043 psi | 85% | 1276 fps | 90.4% |
| Shooters World Major Pistol² | <<locked>> | 72% | 36,579 psi | 84% | 1280 fps | 95.4% |
| SNPE Vectan A0 | <<locked>> | 80% | 36,651 psi | 84% | 1122 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 36,767 psi | 85% | 1079 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 35,853 psi | 82% | 1089 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 36,100 psi | 83% | 978 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 36,201 psi | 83% | 1175 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 39,117 psi | 90% | 1122 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 37,739 psi | 87% | 1273 fps | 100% |
| Somchem MP200² | <<locked>> | 72% | 38,667 psi | 89% | 1171 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 37,594 psi | 86% | 1138 fps | 100% |
| Somchem S221² | <<locked>> | 64% | 34,693 psi | 80% | 1214 fps | 98.4% |
| Vihtavuori 3N37² | <<locked>> | 76% | 35,447 psi | 81% | 1181 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 37,840 psi | 87% | 1266 fps | 98% |
| Vihtavuori N105 | <<locked>> | 96% | 37,376 psi | 86% | 1306 fps | 99.8% |
| Vihtavuori N320² | <<locked>> | 68% | 35,897 psi | 83% | 1040 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 35,012 psi | 80% | 971 fps | 100% |
| Vihtavuori N330² | <<locked>> | 68% | 35,404 psi | 81% | 1086 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 37,797 psi | 87% | 1142 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 37,898 psi | 87% | 1201 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 39,131 psi | 90% | 1132 fps | 100% |
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 26,585 psi | 61% | 1017 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 23,931 psi | 55% | 1089 fps | 89% |
| Accurate No. 9*² | <<locked>> | 72% | 27,572 psi | 63% | 1148 fps | 85.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 27,006 psi | 62% | 935 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,467 psi | 54% | 938 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 27,659 psi | 64% | 1145 fps | 86.9% |
| ADI AP 100*² | <<locked>> | 60% | 16,346 psi | 38% | 892 fps | 91.8% |
| ADI AP 70N² | <<locked>> | 60% | 34,055 psi | 78% | 1073 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 28,689 psi | 66% | 873 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,006 psi | 62% | 879 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 27,224 psi | 63% | 912 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 28,906 psi | 66% | 968 fps | 100% |
| Alliant 2400* | <<locked>> | 88% | 33,547 psi | 77% | 1253 fps | 85.9% |
| Alliant BE-86² | <<locked>> | 60% | 24,700 psi | 57% | 948 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 72% | 21,205 psi | 49% | 1024 fps | 85.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 30,081 psi | 69% | 1079 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 26,701 psi | 61% | 945 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 18,347 psi | 42% | 902 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 23,076 psi | 53% | 1060 fps | 96% |
| Alliant RED DOT² | <<locked>> | 60% | 25,947 psi | 60% | 909 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 33,736 psi | 78% | 1125 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 24,178 psi | 56% | 1001 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 25,831 psi | 59% | 928 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,985 psi | 41% | 833 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 28,964 psi | 67% | 988 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,264 psi | 53% | 833 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 33,359 psi | 77% | 1161 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,776 psi | 22% | 614 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 28,427 psi | 65% | 1007 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 23,931 psi | 55% | 1089 fps | 89% |
| Lovex D037.2*² | <<locked>> | 72% | 28,210 psi | 65% | 1158 fps | 85.8% |
| Lovex S011² | <<locked>> | 60% | 33,678 psi | 77% | 1037 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 27,847 psi | 64% | 1024 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 22,568 psi | 52% | 922 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 24,845 psi | 57% | 951 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 25,643 psi | 59% | 942 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 27,209 psi | 63% | 945 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,704 psi | 68% | 932 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 88% | 31,966 psi | 73% | 1243 fps | 86.3% |
| Ramshot Silhouette² | <<locked>> | 60% | 33,605 psi | 77% | 1129 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 32,024 psi | 74% | 1020 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,602 psi | 22% | 627 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 22,408 psi | 52% | 978 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 21,248 psi | 49% | 1027 fps | 89.4% |
| Rottweil P 806² | <<locked>> | 60% | 18,652 psi | 43% | 1007 fps | 98.1% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 28,210 psi | 65% | 1158 fps | 85.8% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 23,931 psi | 55% | 1089 fps | 89% |
| SNPE Vectan A0² | <<locked>> | 60% | 22,408 psi | 52% | 945 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 27,021 psi | 62% | 974 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 26,165 psi | 60% | 978 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,892 psi | 69% | 915 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 19,261 psi | 44% | 932 fps | 98.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 26,005 psi | 60% | 978 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 26,150 psi | 60% | 1115 fps | 98.7% |
| Somchem MP200² | <<locked>> | 60% | 27,804 psi | 64% | 1050 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 25,034 psi | 58% | 991 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 30,908 psi | 71% | 1165 fps | 97.4% |
| Vihtavuori 3N37² | <<locked>> | 60% | 22,263 psi | 51% | 1004 fps | 99.7% |
| Vihtavuori 3N38*² | <<locked>> | 64% | 17,709 psi | 41% | 948 fps | 87.2% |
| Vihtavuori N105*² | <<locked>> | 60% | 12,937 psi | 30% | 869 fps | 85.3% |
| Vihtavuori N320² | <<locked>> | 60% | 28,471 psi | 65% | 965 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,766 psi | 36% | 732 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 28,355 psi | 65% | 1014 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 24,831 psi | 57% | 994 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 19,624 psi | 45% | 955 fps | 99.3% |
| Winchester AutoComp ² | <<locked>> | 60% | 23,583 psi | 54% | 955 fps | 100% |
* 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 Mag. loaded with the .358 | 180gr | LOS HP. Ramshot Enforcer delivers the highest muzzle velocity at 1,306 fps; across all powders the maximum-charge window runs from 817 fps to 1,306 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 23 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 42–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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. As outliers, Accurate No. 9, Accurate TCM, Alliant 2400 burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate No. 7, 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.