Load Specifications
Load data in caliber .357 Mag. with .357 | 180gr | Geco HEXAGON bullet and 72 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 N105 and ADI AP 100.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 37,536 psi | 86% | 1109 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 39,088 psi | 90% | 1217 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 34,606 psi | 80% | 1227 fps | 93.4% |
| Accurate No. 9* | <<locked>> | 88% | 38,377 psi | 88% | 1257 fps | 89.2% |
| Accurate Solo 1000² | <<locked>> | 76% | 35,534 psi | 82% | 1007 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 38,972 psi | 90% | 1089 fps | 100% |
| Accurate TCM* | <<locked>> | 88% | 38,435 psi | 88% | 1253 fps | 90.6% |
| ADI AP 100ᴾ | <<locked>> | 100% | 37,913 psi | 87% | 1207 fps | 99.7% |
| ADI AP 70N² | <<locked>> | 68% | 37,115 psi | 85% | 1086 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,305 psi | 88% | 942 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 35,795 psi | 82% | 948 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 37,927 psi | 87% | 1004 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,551 psi | 89% | 1047 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 36,898 psi | 85% | 1063 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 36,172 psi | 83% | 1234 fps | 92.9% |
| Alliant BULLSEYE² | <<locked>> | 72% | 36,811 psi | 85% | 1132 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 37,971 psi | 87% | 1047 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 38,580 psi | 89% | 1155 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 39,131 psi | 90% | 1263 fps | 99.7% |
| Alliant RED DOT | <<locked>> | 80% | 37,304 psi | 86% | 1014 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,797 psi | 87% | 1145 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 38,029 psi | 87% | 1152 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,798 psi | 89% | 1037 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 35,897 psi | 83% | 1030 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 39,117 psi | 90% | 1066 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 37,956 psi | 87% | 968 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 37,942 psi | 87% | 1184 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 36,143 psi | 83% | 1161 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,201 psi | 37% | 758 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,115 psi | 85% | 1086 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 39,117 psi | 90% | 1217 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 34,606 psi | 80% | 1227 fps | 93.4% |
| Lovex D037.2* | <<locked>> | 84% | 34,432 psi | 79% | 1214 fps | 87.5% |
| Lovex S011² | <<locked>> | 68% | 37,985 psi | 87% | 1053 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 38,899 psi | 89% | 1115 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 39,015 psi | 90% | 1086 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 39,349 psi | 90% | 1089 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 36,695 psi | 84% | 1043 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 39,233 psi | 90% | 1047 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,986 psi | 90% | 1001 fps | 100% |
| Ramshot Enforcer*ᴾ | <<locked>> | 100% | 38,261 psi | 88% | 1289 fps | 87.5% |
| Ramshot Silhouette² | <<locked>> | 68% | 36,811 psi | 85% | 1142 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 37,695 psi | 87% | 1171 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 37,782 psi | 87% | 1063 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,982 psi | 34% | 768 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 37,420 psi | 86% | 1138 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 84% | 36,274 psi | 83% | 1230 fps | 96% |
| Rottweil P 801² | <<locked>> | 68% | 38,957 psi | 90% | 1043 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 35,128 psi | 81% | 1240 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 39,117 psi | 90% | 1217 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 84% | 34,432 psi | 79% | 1214 fps | 87.5% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 34,606 psi | 80% | 1227 fps | 93.4% |
| SNPE Vectan A0 | <<locked>> | 88% | 39,363 psi | 90% | 1122 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,202 psi | 86% | 1060 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,216 psi | 83% | 1066 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,072 psi | 85% | 961 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 38,493 psi | 88% | 1171 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 39,146 psi | 90% | 1099 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 35,621 psi | 82% | 1227 fps | 99.9% |
| Somchem MP200² | <<locked>> | 76% | 36,680 psi | 84% | 1132 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 36,390 psi | 84% | 1106 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 38,363 psi | 88% | 1230 fps | 98.5% |
| Vihtavuori 3N37 | <<locked>> | 84% | 38,232 psi | 88% | 1188 fps | 100% |
| Vihtavuori 3N38ᴾ | <<locked>> | 100% | 38,841 psi | 89% | 1247 fps | 97.3% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 33,388 psi | 77% | 1237 fps | 98.8% |
| Vihtavuori N320² | <<locked>> | 76% | 38,537 psi | 89% | 1043 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 29,950 psi | 69% | 909 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,203 psi | 88% | 1093 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 36,666 psi | 84% | 1109 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,593 psi | 84% | 1165 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,071 psi | 83% | 1053 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 37,550 psi | 86% | 1096 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 23,264 psi | 53% | 951 fps | 100% |
| Accurate No. 5² | <<locked>> | 60% | 33,808 psi | 78% | 1161 fps | 99.8% |
| Accurate No. 7*² | <<locked>> | 64% | 22,466 psi | 52% | 1050 fps | 86.4% |
| Accurate No. 9* | <<locked>> | 84% | 33,446 psi | 77% | 1201 fps | 87% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,163 psi | 56% | 886 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,436 psi | 47% | 886 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 30,008 psi | 69% | 1152 fps | 86.6% |
| ADI AP 100*² | 4.8 gr | 60% | 13,097 psi | 30% | 804 fps | 86.4% |
| ADI AP 70N² | <<locked>> | 60% | 29,196 psi | 67% | 1004 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,774 psi | 62% | 830 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,396 psi | 58% | 843 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,728 psi | 55% | 856 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,686 psi | 59% | 915 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,379 psi | 49% | 896 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 24,004 psi | 55% | 1060 fps | 86.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,672 psi | 61% | 1017 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,366 psi | 54% | 889 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,953 psi | 34% | 830 fps | 99.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,595 psi | 45% | 978 fps | 92.6% |
| Alliant RED DOT² | <<locked>> | 60% | 23,076 psi | 53% | 863 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,776 psi | 68% | 1060 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,291 psi | 47% | 932 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,858 psi | 53% | 876 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,417 psi | 33% | 771 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,511 psi | 56% | 925 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,292 psi | 49% | 791 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 28,311 psi | 65% | 1076 fps | 99.7% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,140 psi | 74% | 1115 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,774 psi | 18% | 574 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,207 psi | 56% | 945 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 33,765 psi | 78% | 1158 fps | 99.8% |
| Lovex D037.1*² | <<locked>> | 64% | 22,466 psi | 52% | 1050 fps | 86.4% |
| Lovex D037.2* | <<locked>> | 80% | 30,008 psi | 69% | 1155 fps | 85.1% |
| Lovex S011² | <<locked>> | 60% | 30,530 psi | 70% | 984 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 23,975 psi | 55% | 961 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,566 psi | 45% | 866 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,943 psi | 48% | 896 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 21,611 psi | 50% | 879 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,047 psi | 55% | 892 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,440 psi | 61% | 883 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 96% | 33,286 psi | 77% | 1234 fps | 85.2% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,660 psi | 66% | 1053 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 32,532 psi | 75% | 1119 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,296 psi | 63% | 958 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,121 psi | 16% | 571 fps | 99.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,710 psi | 43% | 912 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 19,537 psi | 45% | 978 fps | 86.4% |
| Rottweil P 801² | <<locked>> | 60% | 30,647 psi | 70% | 968 fps | 100% |
| Rottweil P 806*² | 7 gr | 60% | 13,387 psi | 31% | 892 fps | 93% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 33,765 psi | 78% | 1158 fps | 99.8% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 30,008 psi | 69% | 1155 fps | 85.1% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 22,466 psi | 52% | 1050 fps | 86.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,232 psi | 44% | 883 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,192 psi | 56% | 922 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,322 psi | 54% | 925 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,543 psi | 63% | 866 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 16,534 psi | 38% | 866 fps | 95.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,350 psi | 51% | 915 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 20,581 psi | 47% | 1010 fps | 95.4% |
| Somchem MP200² | <<locked>> | 60% | 23,815 psi | 55% | 981 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,567 psi | 50% | 928 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 25,266 psi | 58% | 1060 fps | 93.9% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,594 psi | 43% | 928 fps | 98.1% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 17,738 psi | 41% | 938 fps | 85.7% |
| Vihtavuori N105*² | 6.6 gr | 72% | 14,315 psi | 33% | 906 fps | 85.9% |
| Vihtavuori N320² | <<locked>> | 60% | 25,034 psi | 58% | 912 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,720 psi | 29% | 682 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 23,438 psi | 54% | 942 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,465 psi | 47% | 919 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 15,867 psi | 36% | 873 fps | 96.7% |
| Winchester 231² | <<locked>> | 60% | 31,502 psi | 72% | 1010 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,609 psi | 45% | 886 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 72 powders for .357 Mag. loaded with the .357 | 180gr | Geco HEXAGON. Ramshot Enforcer delivers the highest muzzle velocity at 1,289 fps; across all powders the maximum-charge window runs from 758 fps to 1,289 fps. ADI AP 100 gives the best case fill at 100 %, and 38 of the 72 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 34–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, Alliant Herco 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 N105, ADI AP 100 rank at the top here: for .357 Mag. with the .357 | 180gr | Geco HEXAGON they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Accurate No. 9, Accurate TCM 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.