Load Specifications
Load data in caliber .357 Maximum with .358 | 170gr | Rim Rock LBT?RNFP 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.
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% | 38,305 psi | 85% | 1581 fps | 92% |
| Accurate No. 2² | <<locked>> | 64% | 37,115 psi | 83% | 1355 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 37,971 psi | 84% | 1555 fps | 99.4% |
| Accurate No. 9² | <<locked>> | 72% | 38,667 psi | 86% | 1572 fps | 96.8% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,101 psi | 85% | 1263 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,581 psi | 88% | 1332 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 38,363 psi | 85% | 1562 fps | 97.5% |
| ADI AP 100 | <<locked>> | 84% | 39,131 psi | 87% | 1493 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 37,826 psi | 84% | 1171 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,074 psi | 89% | 1227 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,654 psi | 90% | 1263 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,275 psi | 83% | 1266 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 37,362 psi | 83% | 1578 fps | 94.3% |
| Alliant BE-86² | <<locked>> | 68% | 37,028 psi | 82% | 1293 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 38,841 psi | 86% | 1565 fps | 99.1% |
| Alliant Green Dot² | <<locked>> | 68% | 38,203 psi | 85% | 1280 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,711 psi | 88% | 1407 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 38,377 psi | 85% | 1529 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 39,059 psi | 87% | 1631 fps | 89.9% |
| Alliant RED DOT² | <<locked>> | 72% | 39,494 psi | 88% | 1270 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 36,970 psi | 82% | 1378 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,537 psi | 86% | 1266 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,855 psi | 84% | 1270 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,450 psi | 86% | 1286 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,262 psi | 87% | 1214 fps | 100% |
| Hodgdon H110* | <<locked>> | 88% | 40,480 psi | 90% | 1654 fps | 89.6% |
| Hodgdon LilGun | <<locked>> | 92% | 39,566 psi | 88% | 1686 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,582 psi | 50% | 1024 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,782 psi | 84% | 1325 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 37,971 psi | 84% | 1555 fps | 99.4% |
| Lovex D037.2² | <<locked>> | 72% | 39,247 psi | 87% | 1578 fps | 97% |
| Lovex S020² | <<locked>> | 64% | 38,827 psi | 86% | 1355 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 36,796 psi | 82% | 1296 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 37,159 psi | 83% | 1293 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 37,173 psi | 83% | 1280 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,783 psi | 86% | 1276 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,826 psi | 84% | 1220 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 37,043 psi | 82% | 1578 fps | 95.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,596 psi | 48% | 1043 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 40,524 psi | 90% | 1401 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 40,364 psi | 90% | 1572 fps | 100% |
| ReloadSwiss RS 30*ᴾ | <<locked>> | 100% | 31,096 psi | 69% | 1519 fps | 87.9% |
| Rottweil P 806² | <<locked>> | 72% | 38,101 psi | 85% | 1506 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 39,247 psi | 87% | 1578 fps | 97% |
| Shooters World Major Pistol² | <<locked>> | 64% | 37,971 psi | 84% | 1555 fps | 99.4% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,362 psi | 83% | 1342 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,885 psi | 89% | 1322 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,363 psi | 88% | 1335 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,231 psi | 83% | 1194 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 29,211 psi | 65% | 1447 fps | 94.1% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,014 psi | 85% | 1424 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,957 psi | 87% | 1332 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 39,291 psi | 87% | 1529 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,826 psi | 84% | 1385 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,420 psi | 83% | 1355 fps | 100% |
| Somchem S265*ᴾ | <<locked>> | 100% | 40,524 psi | 90% | 1578 fps | 88.3% |
| Vihtavuori 3N37² | <<locked>> | 68% | 36,738 psi | 82% | 1421 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 36,811 psi | 82% | 1506 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 38,464 psi | 86% | 1552 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 37,159 psi | 83% | 1594 fps | 94.9% |
| Vihtavuori N320² | <<locked>> | 64% | 37,927 psi | 84% | 1266 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 40,176 psi | 89% | 1217 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,609 psi | 86% | 1325 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,768 psi | 84% | 1358 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 40,277 psi | 90% | 1453 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,044 psi | 87% | 1342 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>> | 76% | 28,921 psi | 64% | 1430 fps | 87.2% |
| Accurate No. 2² | <<locked>> | 60% | 32,634 psi | 73% | 1302 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 32,996 psi | 73% | 1483 fps | 98.5% |
| Accurate No. 9*² | <<locked>> | 60% | 24,787 psi | 55% | 1335 fps | 90.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,169 psi | 69% | 1181 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,689 psi | 64% | 1198 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,918 psi | 55% | 1335 fps | 91.8% |
| ADI AP 100² | <<locked>> | 60% | 20,320 psi | 45% | 1184 fps | 98.8% |
| ADI APS 350² | <<locked>> | 60% | 31,372 psi | 70% | 1093 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,574 psi | 68% | 1112 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,661 psi | 68% | 1145 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,750 psi | 75% | 1224 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 22,162 psi | 49% | 1296 fps | 85.3% |
| Alliant BE-86² | <<locked>> | 60% | 29,849 psi | 66% | 1204 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,087 psi | 42% | 1194 fps | 90% |
| Alliant Green Dot² | <<locked>> | 60% | 31,328 psi | 70% | 1198 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,698 psi | 48% | 1148 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,544 psi | 66% | 1398 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 33,750 psi | 75% | 1549 fps | 87.3% |
| Alliant RED DOT² | <<locked>> | 60% | 30,182 psi | 67% | 1155 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,385 psi | 65% | 1276 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,937 psi | 69% | 1178 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 21,016 psi | 47% | 1050 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,548 psi | 77% | 1243 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,802 psi | 57% | 1043 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 35,012 psi | 78% | 1572 fps | 87.1% |
| Hodgdon LilGun*² | <<locked>> | 76% | 21,785 psi | 48% | 1362 fps | 85.6% |
| Hodgdon TrailBoss² | 4.5 gr | 60% | 10,530 psi | 23% | 774 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,750 psi | 75% | 1276 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 32,996 psi | 73% | 1483 fps | 98.5% |
| Lovex D037.2*² | <<locked>> | 60% | 25,614 psi | 57% | 1352 fps | 91% |
| Lovex S020² | <<locked>> | 60% | 34,490 psi | 77% | 1306 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,818 psi | 60% | 1168 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,530 psi | 68% | 1211 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,878 psi | 66% | 1188 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,792 psi | 71% | 1194 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,200 psi | 76% | 1178 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 20,900 psi | 46% | 1280 fps | 85.6% |
| ReloadSwiss RS 14² | 4.6 gr | 60% | 10,037 psi | 22% | 787 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,747 psi | 64% | 1257 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 27,325 psi | 61% | 1368 fps | 98% |
| ReloadSwiss RS 30* | <<locked>> | 96% | 27,717 psi | 62% | 1450 fps | 85.3% |
| Rottweil P 806² | <<locked>> | 60% | 25,135 psi | 56% | 1322 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,614 psi | 57% | 1352 fps | 91% |
| Shooters World Major Pistol² | <<locked>> | 60% | 32,996 psi | 73% | 1483 fps | 98.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,166 psi | 60% | 1211 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,372 psi | 72% | 1234 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,778 psi | 71% | 1247 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,823 psi | 75% | 1152 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 84% | 18,971 psi | 42% | 1227 fps | 86% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,844 psi | 53% | 1217 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,749 psi | 71% | 1247 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 34,229 psi | 76% | 1460 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,953 psi | 76% | 1335 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,458 psi | 68% | 1266 fps | 100% |
| Somchem S265* | <<locked>> | 96% | 36,318 psi | 81% | 1519 fps | 86.4% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,616 psi | 64% | 1309 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,740 psi | 44% | 1201 fps | 94.9% |
| Vihtavuori N105² | <<locked>> | 60% | 17,318 psi | 39% | 1188 fps | 96.6% |
| Vihtavuori N110* | <<locked>> | 84% | 22,931 psi | 51% | 1345 fps | 86.8% |
| Vihtavuori N320² | <<locked>> | 60% | 34,229 psi | 76% | 1224 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.1 gr | 60% | 17,695 psi | 39% | 919 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,330 psi | 76% | 1280 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,921 psi | 67% | 1260 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,845 psi | 55% | 1243 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,152 psi | 63% | 1207 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 | 170gr | Rim Rock LBT?RNFP Gas Check. Hodgdon LilGun delivers the highest muzzle velocity at 1,686 fps; across all powders the maximum-charge window runs from 1,024 fps to 1,686 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 | 170gr | Rim Rock LBT?RNFP Gas Check they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Alliant 2400, Alliant Power Pro 300-MP burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, ADI APS 450, Baschieri & Pellagri 102 Pistol 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.