Load Specifications
Load data in caliber .357 Maximum with .358 | 180gr | Rim Rock LBT-WFN Gas Check 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 N32C Tin Star, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100* | <<locked>> | 84% | 38,856 psi | 86% | 1539 fps | 92.9% |
| Accurate No. 2² | <<locked>> | 64% | 37,333 psi | 83% | 1309 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 38,943 psi | 87% | 1516 fps | 99.7% |
| Accurate No. 9² | <<locked>> | 72% | 39,291 psi | 87% | 1529 fps | 97.5% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,740 psi | 86% | 1224 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,842 psi | 89% | 1283 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 38,928 psi | 87% | 1516 fps | 98.1% |
| ADI AP 100 | <<locked>> | 84% | 39,537 psi | 88% | 1444 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 38,101 psi | 85% | 1129 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,596 psi | 90% | 1184 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 37,405 psi | 83% | 1181 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,913 psi | 84% | 1227 fps | 100% |
| Alliant 2400 | <<locked>> | 80% | 38,000 psi | 85% | 1535 fps | 95.2% |
| Alliant BE-86² | <<locked>> | 68% | 37,449 psi | 83% | 1247 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 39,088 psi | 87% | 1516 fps | 99.4% |
| Alliant Green Dot² | <<locked>> | 68% | 38,130 psi | 85% | 1230 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,813 psi | 89% | 1358 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 38,595 psi | 86% | 1476 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 39,972 psi | 89% | 1594 fps | 91.1% |
| Alliant RED DOT² | <<locked>> | 72% | 40,059 psi | 89% | 1227 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 37,289 psi | 83% | 1332 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,609 psi | 86% | 1220 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,363 psi | 85% | 1227 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,175 psi | 87% | 1247 fps | 100% |
| Hodgdon Clays² | <<locked>> | 68% | 38,986 psi | 87% | 1148 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 36,260 psi | 81% | 1542 fps | 88.6% |
| Hodgdon LilGun | <<locked>> | 88% | 34,635 psi | 77% | 1562 fps | 95% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,931 psi | 51% | 991 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,985 psi | 84% | 1276 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 38,943 psi | 87% | 1516 fps | 99.7% |
| Lovex D037.2² | <<locked>> | 72% | 39,900 psi | 89% | 1535 fps | 97.6% |
| Lovex S020² | <<locked>> | 64% | 39,972 psi | 89% | 1316 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,710 psi | 84% | 1257 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 38,072 psi | 85% | 1253 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 37,246 psi | 83% | 1230 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,754 psi | 86% | 1230 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,550 psi | 84% | 1171 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 37,405 psi | 83% | 1535 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,973 psi | 49% | 1010 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 36,782 psi | 82% | 1309 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 36,143 psi | 80% | 1460 fps | 99.9% |
| ReloadSwiss RS 30*ᴾ | <<locked>> | 100% | 31,531 psi | 70% | 1480 fps | 89.3% |
| Rottweil P 806² | <<locked>> | 72% | 38,624 psi | 86% | 1460 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 39,900 psi | 89% | 1535 fps | 97.6% |
| Shooters World Major Pistol² | <<locked>> | 64% | 38,943 psi | 87% | 1516 fps | 99.7% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,782 psi | 84% | 1299 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 40,277 psi | 90% | 1276 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,784 psi | 88% | 1289 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,652 psi | 84% | 1155 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 29,907 psi | 67% | 1411 fps | 95.1% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,276 psi | 85% | 1375 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,233 psi | 87% | 1286 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 40,379 psi | 90% | 1486 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,305 psi | 85% | 1339 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,768 psi | 84% | 1309 fps | 100% |
| Somchem S265* | <<locked>> | 96% | 36,767 psi | 82% | 1476 fps | 87.5% |
| Vihtavuori 3N37² | <<locked>> | 68% | 37,550 psi | 84% | 1378 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 37,492 psi | 83% | 1463 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 39,479 psi | 88% | 1509 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 38,363 psi | 85% | 1562 fps | 96% |
| Vihtavuori N320² | <<locked>> | 64% | 38,667 psi | 86% | 1227 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 40,480 psi | 90% | 1175 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 39,697 psi | 88% | 1289 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 38,174 psi | 85% | 1312 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 40,495 psi | 90% | 1404 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,639 psi | 88% | 1299 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 72% | 25,686 psi | 57% | 1325 fps | 85.9% |
| Accurate No. 2² | <<locked>> | 60% | 32,721 psi | 73% | 1253 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 33,156 psi | 74% | 1434 fps | 98.9% |
| Accurate No. 9*² | <<locked>> | 60% | 25,295 psi | 56% | 1302 fps | 91.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,546 psi | 70% | 1138 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,211 psi | 65% | 1161 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 25,382 psi | 56% | 1299 fps | 92.8% |
| ADI AP 100² | <<locked>> | 60% | 20,494 psi | 46% | 1145 fps | 99.2% |
| ADI APS 350² | <<locked>> | 60% | 31,430 psi | 70% | 1053 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,777 psi | 68% | 1073 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,893 psi | 69% | 1102 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 34,258 psi | 76% | 1184 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 22,568 psi | 50% | 1263 fps | 86.6% |
| Alliant BE-86² | <<locked>> | 60% | 29,994 psi | 67% | 1161 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,450 psi | 43% | 1165 fps | 91.2% |
| Alliant Green Dot² | <<locked>> | 60% | 31,749 psi | 71% | 1155 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,191 psi | 49% | 1115 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 30,037 psi | 67% | 1355 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 80% | 30,110 psi | 67% | 1440 fps | 86.1% |
| Alliant RED DOT² | <<locked>> | 60% | 30,400 psi | 68% | 1112 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,066 psi | 67% | 1240 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,444 psi | 70% | 1142 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 20,958 psi | 47% | 1007 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,563 psi | 77% | 1198 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 32,126 psi | 71% | 1070 fps | 100% |
| Hodgdon H110* | <<locked>> | 80% | 31,183 psi | 69% | 1460 fps | 85.8% |
| Hodgdon LilGun*² | <<locked>> | 76% | 22,350 psi | 50% | 1339 fps | 87.3% |
| Hodgdon TrailBoss² | 4.4 gr | 60% | 10,762 psi | 24% | 751 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 34,476 psi | 77% | 1237 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 33,156 psi | 74% | 1434 fps | 98.9% |
| Lovex D037.2*² | <<locked>> | 60% | 26,121 psi | 58% | 1319 fps | 92.1% |
| Lovex S020² | <<locked>> | 60% | 35,433 psi | 79% | 1266 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,311 psi | 61% | 1129 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,487 psi | 68% | 1165 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,327 psi | 67% | 1148 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 32,242 psi | 72% | 1152 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,519 psi | 77% | 1138 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 21,480 psi | 48% | 1253 fps | 87.1% |
| ReloadSwiss RS 14² | 4.5 gr | 60% | 10,283 psi | 23% | 764 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,950 psi | 64% | 1214 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 28,007 psi | 62% | 1332 fps | 98.6% |
| ReloadSwiss RS 30* | <<locked>> | 96% | 28,079 psi | 62% | 1414 fps | 86.7% |
| Rottweil P 806² | <<locked>> | 60% | 25,556 psi | 57% | 1283 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 26,121 psi | 58% | 1319 fps | 92.1% |
| Shooters World Major Pistol² | <<locked>> | 60% | 33,156 psi | 74% | 1434 fps | 98.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,789 psi | 62% | 1175 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,503 psi | 72% | 1191 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,937 psi | 71% | 1201 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,142 psi | 76% | 1112 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 80% | 17,463 psi | 39% | 1148 fps | 85.3% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,584 psi | 55% | 1188 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,792 psi | 71% | 1201 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 35,099 psi | 78% | 1421 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 34,301 psi | 76% | 1289 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,530 psi | 68% | 1220 fps | 100% |
| Somchem S265* | <<locked>> | 92% | 32,851 psi | 73% | 1417 fps | 85.5% |
| Vihtavuori 3N37² | <<locked>> | 60% | 29,109 psi | 65% | 1270 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 60% | 20,131 psi | 45% | 1168 fps | 95.8% |
| Vihtavuori N105² | <<locked>> | 60% | 17,738 psi | 39% | 1155 fps | 97.5% |
| Vihtavuori N110* | <<locked>> | 80% | 20,726 psi | 46% | 1253 fps | 85.9% |
| Vihtavuori N320² | <<locked>> | 60% | 34,853 psi | 78% | 1184 fps | 100% |
| Vihtavuori N32C Tin Star² | 5.9 gr | 60% | 17,796 psi | 40% | 886 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 35,172 psi | 78% | 1240 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 30,690 psi | 68% | 1224 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,135 psi | 56% | 1204 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,863 psi | 64% | 1171 fps | 100% |
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 Maximum loaded with the .358 | 180gr | Rim Rock LBT-WFN Gas Check. Alliant Power Pro 300-MP delivers the highest muzzle velocity at 1,594 fps; across all powders the maximum-charge window runs from 991 fps to 1,594 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 19 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, ReloadSwiss RS 30 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 N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Maximum with the .358 | 180gr | Rim Rock LBT-WFN Gas Check they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Alliant Power Pro 300-MP, Hodgdon H110 burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, ADI APS 450, ADI AS 30 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.