Load Specifications
Load data in caliber 9 x 20 VGW with .358 | 148gr | Rim Rock SWC 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 3N37, Rottweil P 806 and Alliant UNIQUE.
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: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 84% | 37,260 psi | 86% | 1132 fps | 100% |
| Accurate No. 5² | <<locked>> | 68% | 34,490 psi | 79% | 1178 fps | 95.9% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,653 psi | 89% | 1073 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 36,521 psi | 84% | 1106 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 28,558 psi | 66% | 1096 fps | 91.4% |
| ADI AP 70N² | <<locked>> | 76% | 36,753 psi | 84% | 1125 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,334 psi | 90% | 981 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 36,782 psi | 85% | 991 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 38,145 psi | 88% | 1043 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 37,231 psi | 86% | 1076 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 39,044 psi | 90% | 1122 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 35,418 psi | 81% | 1155 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 38,029 psi | 87% | 1089 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 30,327 psi | 70% | 1102 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 36,347 psi | 84% | 1240 fps | 94.3% |
| Alliant RED DOT | <<locked>> | 92% | 38,566 psi | 89% | 1066 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 38,014 psi | 87% | 1184 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 39,305 psi | 90% | 1204 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,942 psi | 87% | 1073 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 30,632 psi | 70% | 1024 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,725 psi | 89% | 1102 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 88% | 36,985 psi | 85% | 1125 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 37,869 psi | 87% | 997 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 36,332 psi | 84% | 1089 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 37,028 psi | 85% | 1191 fps | 98.1% |
| Hodgdon Longshot² | <<locked>> | 72% | 37,072 psi | 85% | 1191 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,720 psi | 29% | 728 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 35,433 psi | 81% | 1112 fps | 100% |
| Lovex D036² | <<locked>> | 68% | 34,447 psi | 79% | 1178 fps | 95.8% |
| Lovex S011² | <<locked>> | 76% | 38,740 psi | 89% | 1099 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 37,782 psi | 87% | 1145 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 36,753 psi | 84% | 1106 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 35,781 psi | 82% | 1109 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 38,145 psi | 88% | 1099 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,072 psi | 88% | 1079 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 39,175 psi | 90% | 1043 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 36,245 psi | 83% | 1168 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 37,768 psi | 87% | 1194 fps | 99.2% |
| Ramshot Zip² | <<locked>> | 64% | 35,012 psi | 80% | 1083 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,637 psi | 84% | 1102 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,690 psi | 27% | 728 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 38,479 psi | 88% | 1194 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 96% | 37,739 psi | 87% | 1240 fps | 88.7% |
| Rottweil P 801² | <<locked>> | 76% | 38,653 psi | 89% | 1089 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 33,997 psi | 78% | 1253 fps | 98.1% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 34,447 psi | 79% | 1178 fps | 95.8% |
| SNPE Vectan A0 | <<locked>> | 96% | 37,797 psi | 87% | 1142 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 37,043 psi | 85% | 1096 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,406 psi | 88% | 1125 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,247 psi | 88% | 1004 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 36,680 psi | 84% | 1175 fps | 98.7% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 36,941 psi | 85% | 1119 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 88% | 36,260 psi | 83% | 1253 fps | 96.1% |
| Somchem MP200 | <<locked>> | 84% | 35,737 psi | 82% | 1155 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 38,087 psi | 88% | 1158 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 37,681 psi | 87% | 1224 fps | 92.1% |
| Vihtavuori 3N37 | <<locked>> | 96% | 39,233 psi | 90% | 1224 fps | 99.6% |
| Vihtavuori N310² | <<locked>> | 68% | 38,014 psi | 87% | 1004 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 38,319 psi | 88% | 1089 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 23,975 psi | 55% | 886 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 36,477 psi | 84% | 1125 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,508 psi | 89% | 1161 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 37,507 psi | 86% | 1198 fps | 99.5% |
| Winchester 231² | <<locked>> | 72% | 36,332 psi | 84% | 1096 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 35,824 psi | 82% | 1184 fps | 98.5% |
| Winchester AutoComp | <<locked>> | 92% | 35,955 psi | 83% | 1119 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 17,695 psi | 41% | 869 fps | 94.7% |
| Accurate No. 5*² | <<locked>> | 60% | 26,252 psi | 60% | 1063 fps | 92.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,972 psi | 46% | 860 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,592 psi | 36% | 827 fps | 99.5% |
| ADI AP 100* | <<locked>> | 88% | 21,567 psi | 50% | 984 fps | 86.5% |
| ADI AP 70N² | <<locked>> | 60% | 22,756 psi | 52% | 958 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,249 psi | 51% | 807 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,422 psi | 49% | 823 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,218 psi | 46% | 843 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,234 psi | 49% | 892 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,331 psi | 38% | 843 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,552 psi | 47% | 948 fps | 98.9% |
| Alliant Green Dot² | <<locked>> | 60% | 19,014 psi | 44% | 860 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,545 psi | 27% | 755 fps | 91% |
| Alliant POWER PISTOL*² | <<locked>> | 76% | 24,091 psi | 55% | 1056 fps | 87.6% |
| Alliant RED DOT² | <<locked>> | 60% | 19,305 psi | 44% | 843 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,743 psi | 55% | 1001 fps | 99.4% |
| Alliant UNIQUE² | 3.8 gr | 60% | 15,693 psi | 36% | 860 fps | 95.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,811 psi | 41% | 837 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,269 psi | 26% | 732 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,406 psi | 45% | 889 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 17,593 psi | 40% | 873 fps | 99.8% |
| Hodgdon Clays² | <<locked>> | 60% | 17,361 psi | 40% | 764 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 32,372 psi | 74% | 1050 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,176 psi | 51% | 991 fps | 91.8% |
| Hodgdon Longshot² | <<locked>> | 60% | 24,584 psi | 56% | 1030 fps | 95.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,092 psi | 14% | 535 fps | 97.7% |
| Hodgdon Universal² | <<locked>> | 60% | 19,043 psi | 44% | 899 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 26,208 psi | 60% | 1063 fps | 92.1% |
| Lovex S011² | <<locked>> | 60% | 24,178 psi | 56% | 942 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,999 psi | 41% | 892 fps | 98.8% |
| Maxam CSB 1² | <<locked>> | 60% | 15,011 psi | 35% | 810 fps | 99.3% |
| Maxam CSB 2² | <<locked>> | 60% | 15,360 psi | 35% | 843 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,419 psi | 40% | 846 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,595 psi | 45% | 866 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,524 psi | 49% | 856 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,626 psi | 52% | 988 fps | 97.9% |
| Ramshot True Blue² | <<locked>> | 60% | 25,034 psi | 58% | 1033 fps | 95.5% |
| Ramshot Zip² | <<locked>> | 60% | 31,183 psi | 72% | 1047 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,103 psi | 49% | 925 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,598 psi | 13% | 522 fps | 92.6% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 14,127 psi | 32% | 843 fps | 96.5% |
| ReloadSwiss RS 24* | <<locked>> | 92% | 34,272 psi | 79% | 1201 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 24,816 psi | 57% | 945 fps | 100% |
| Rottweil P 806*² | 7.5 gr | 76% | 15,156 psi | 35% | 945 fps | 86% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,208 psi | 60% | 1063 fps | 92.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,214 psi | 35% | 817 fps | 94.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,160 psi | 44% | 879 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,376 psi | 42% | 873 fps | 99.5% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,685 psi | 54% | 853 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 15,722 psi | 36% | 850 fps | 87.1% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,709 psi | 41% | 869 fps | 99.9% |
| SNPE Vectan SP 2*² | <<locked>> | 68% | 19,580 psi | 45% | 997 fps | 86.4% |
| Somchem MP200² | <<locked>> | 60% | 18,623 psi | 43% | 909 fps | 96.5% |
| Somchem MS200² | <<locked>> | 60% | 17,202 psi | 40% | 869 fps | 97.5% |
| Somchem S221*² | <<locked>> | 68% | 25,063 psi | 58% | 1053 fps | 85.3% |
| Vihtavuori 3N37*² | 4.6 gr | 60% | 13,648 psi | 31% | 827 fps | 86% |
| Vihtavuori N310² | <<locked>> | 60% | 30,066 psi | 69% | 932 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,072 psi | 44% | 873 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,776 psi | 22% | 656 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,869 psi | 41% | 896 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 16,041 psi | 37% | 853 fps | 96.2% |
| Vihtavuori N350*² | <<locked>> | 64% | 13,445 psi | 31% | 820 fps | 86.2% |
| Winchester 231² | <<locked>> | 60% | 25,483 psi | 59% | 978 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 31,125 psi | 72% | 1129 fps | 97.3% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,650 psi | 36% | 837 fps | 98.9% |
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 45 powders for 9 x 20 VGW loaded with the .358 | 148gr | Rim Rock SWC. Rottweil P 806 delivers the highest muzzle velocity at 1,253 fps; across all powders the maximum-charge window runs from 728 fps to 1,253 fps. ADI AP 100 gives the best case fill at 100 %, and 45 of the 45 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 27–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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 3N37, Rottweil P 806, Alliant UNIQUE rank at the top here: for 9 x 20 VGW with the .358 | 148gr | Rim Rock SWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 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.