Load Specifications
Load data in caliber .357 Maximum with .358 | 180gr | Rim Rock TC 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.
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: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100* | <<locked>> | 84% | 39,233 psi | 87% | 1545 fps | 93.2% |
| Accurate No. 2² | <<locked>> | 64% | 37,550 psi | 84% | 1312 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 38,899 psi | 87% | 1519 fps | 99.7% |
| Accurate No. 9² | <<locked>> | 72% | 39,813 psi | 89% | 1539 fps | 97.7% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,972 psi | 87% | 1227 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 40,059 psi | 89% | 1289 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 39,407 psi | 88% | 1526 fps | 98.3% |
| ADI AP 100 | <<locked>> | 84% | 39,610 psi | 88% | 1447 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 37,594 psi | 84% | 1129 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,045 psi | 89% | 1184 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 37,681 psi | 84% | 1188 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 38,145 psi | 85% | 1230 fps | 100% |
| Alliant 2400 | <<locked>> | 80% | 38,508 psi | 86% | 1545 fps | 95.5% |
| Alliant BE-86² | <<locked>> | 68% | 37,594 psi | 84% | 1250 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 39,682 psi | 88% | 1526 fps | 99.5% |
| Alliant Green Dot² | <<locked>> | 68% | 38,392 psi | 85% | 1237 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 40,538 psi | 90% | 1368 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 38,711 psi | 86% | 1480 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 40,321 psi | 90% | 1601 fps | 91.3% |
| Alliant RED DOT² | <<locked>> | 72% | 40,321 psi | 90% | 1234 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 37,492 psi | 83% | 1335 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,827 psi | 86% | 1227 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,435 psi | 85% | 1230 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,189 psi | 87% | 1247 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 40,016 psi | 89% | 1178 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 36,608 psi | 81% | 1549 fps | 88.8% |
| Hodgdon LilGun | <<locked>> | 88% | 35,607 psi | 79% | 1578 fps | 95.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,134 psi | 51% | 994 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 38,159 psi | 85% | 1283 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 38,899 psi | 87% | 1519 fps | 99.7% |
| Lovex D037.2² | <<locked>> | 72% | 40,379 psi | 90% | 1545 fps | 97.8% |
| Lovex S020² | <<locked>> | 64% | 40,161 psi | 89% | 1319 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,898 psi | 84% | 1260 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 38,305 psi | 85% | 1257 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 37,434 psi | 83% | 1237 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,986 psi | 87% | 1234 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,826 psi | 84% | 1178 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 37,884 psi | 84% | 1542 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,698 psi | 48% | 1007 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 36,985 psi | 82% | 1316 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 36,782 psi | 82% | 1473 fps | 100% |
| ReloadSwiss RS 30*ᴾ | <<locked>> | 100% | 31,865 psi | 71% | 1490 fps | 89.6% |
| Rottweil P 806² | <<locked>> | 72% | 39,146 psi | 87% | 1467 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 40,379 psi | 90% | 1545 fps | 97.8% |
| Shooters World Major Pistol² | <<locked>> | 64% | 38,899 psi | 87% | 1519 fps | 99.7% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,927 psi | 84% | 1302 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 40,393 psi | 90% | 1280 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,914 psi | 89% | 1296 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,884 psi | 84% | 1158 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 30,284 psi | 67% | 1421 fps | 95.3% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,319 psi | 85% | 1378 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,465 psi | 88% | 1293 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 40,495 psi | 90% | 1490 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,435 psi | 85% | 1342 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,927 psi | 84% | 1312 fps | 100% |
| Somchem S265* | <<locked>> | 96% | 37,115 psi | 83% | 1486 fps | 87.8% |
| Vihtavuori 3N37² | <<locked>> | 68% | 37,652 psi | 84% | 1381 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 37,521 psi | 83% | 1467 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 39,494 psi | 88% | 1512 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 38,812 psi | 86% | 1568 fps | 96.2% |
| Vihtavuori N320² | <<locked>> | 64% | 38,957 psi | 87% | 1230 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 40,582 psi | 90% | 1178 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 39,914 psi | 89% | 1293 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 39,073 psi | 87% | 1325 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 36,448 psi | 81% | 1358 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,740 psi | 88% | 1302 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% | 26,063 psi | 58% | 1335 fps | 86.3% |
| Accurate No. 2² | <<locked>> | 60% | 32,967 psi | 73% | 1260 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 33,721 psi | 75% | 1447 fps | 99% |
| Accurate No. 9*² | <<locked>> | 60% | 25,730 psi | 57% | 1312 fps | 91.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,821 psi | 71% | 1145 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,486 psi | 66% | 1165 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 25,831 psi | 57% | 1309 fps | 93.2% |
| ADI AP 100² | <<locked>> | 60% | 20,653 psi | 46% | 1152 fps | 99.3% |
| ADI APS 350² | <<locked>> | 60% | 31,734 psi | 71% | 1056 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 31,038 psi | 69% | 1079 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 31,212 psi | 69% | 1109 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 34,548 psi | 77% | 1188 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 22,611 psi | 50% | 1266 fps | 86.8% |
| Alliant BE-86² | <<locked>> | 60% | 30,182 psi | 67% | 1165 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,566 psi | 44% | 1168 fps | 91.4% |
| Alliant Green Dot² | <<locked>> | 60% | 31,372 psi | 70% | 1155 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,394 psi | 50% | 1122 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 30,197 psi | 67% | 1358 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 80% | 30,472 psi | 68% | 1450 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 30,719 psi | 68% | 1119 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,327 psi | 67% | 1243 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,691 psi | 70% | 1145 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 21,147 psi | 47% | 1014 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,606 psi | 77% | 1201 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,165 psi | 58% | 1010 fps | 100% |
| Hodgdon H110* | <<locked>> | 80% | 31,575 psi | 70% | 1470 fps | 86.2% |
| Hodgdon LilGun*² | <<locked>> | 76% | 22,742 psi | 51% | 1348 fps | 87.7% |
| Hodgdon TrailBoss² | 4.4 gr | 60% | 10,660 psi | 24% | 751 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 34,693 psi | 77% | 1240 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 33,721 psi | 75% | 1447 fps | 99% |
| Lovex D037.2*² | <<locked>> | 60% | 26,179 psi | 58% | 1322 fps | 92.2% |
| Lovex S020² | <<locked>> | 60% | 35,650 psi | 79% | 1273 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,572 psi | 61% | 1135 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,763 psi | 68% | 1171 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,603 psi | 68% | 1155 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,850 psi | 71% | 1152 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,838 psi | 77% | 1142 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 21,509 psi | 48% | 1253 fps | 87.2% |
| ReloadSwiss RS 14² | 4.5 gr | 60% | 10,196 psi | 23% | 761 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 29,138 psi | 65% | 1217 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 28,108 psi | 63% | 1339 fps | 98.7% |
| ReloadSwiss RS 30* | <<locked>> | 96% | 28,326 psi | 63% | 1424 fps | 87.1% |
| Rottweil P 806² | <<locked>> | 60% | 26,078 psi | 58% | 1293 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 26,179 psi | 58% | 1322 fps | 92.2% |
| Shooters World Major Pistol² | <<locked>> | 60% | 33,721 psi | 75% | 1447 fps | 99% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,456 psi | 61% | 1171 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,677 psi | 73% | 1194 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 32,126 psi | 71% | 1207 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,389 psi | 76% | 1119 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 80% | 17,492 psi | 39% | 1152 fps | 85.4% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,729 psi | 55% | 1191 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 32,024 psi | 71% | 1204 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 35,215 psi | 78% | 1424 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 34,490 psi | 77% | 1296 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,763 psi | 68% | 1224 fps | 100% |
| Somchem S265* | <<locked>> | 92% | 33,185 psi | 74% | 1427 fps | 85.8% |
| Vihtavuori 3N37² | <<locked>> | 60% | 29,240 psi | 65% | 1273 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 60% | 20,233 psi | 45% | 1175 fps | 95.9% |
| Vihtavuori N105² | <<locked>> | 60% | 17,883 psi | 40% | 1161 fps | 97.6% |
| Vihtavuori N110* | <<locked>> | 80% | 20,755 psi | 46% | 1257 fps | 86% |
| Vihtavuori N320² | <<locked>> | 60% | 35,114 psi | 78% | 1191 fps | 100% |
| Vihtavuori N32C Tin Star² | 6 gr | 60% | 18,057 psi | 40% | 892 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 35,433 psi | 79% | 1243 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 30,893 psi | 69% | 1230 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,309 psi | 56% | 1207 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 29,037 psi | 65% | 1178 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 TC. Alliant Power Pro 300-MP delivers the highest muzzle velocity at 1,601 fps; across all powders the maximum-charge window runs from 994 fps to 1,601 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 20 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 48–90 %, 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 TC 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.